diff --git a/.vscode/launch.json b/.vscode/launch.json
index 9d9bfa7..7977fdd 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -6,7 +6,7 @@
     "configurations": [
         {
             "name": "Python: Aktuelle Datei",
-            "type": "python",
+            "type": "debugpy",
             "request": "launch",
             "program": "${file}",
             "console": "integratedTerminal",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7a4454d..934a71e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,33 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [unreleased]
+
+## [0.9.0] - 2024-07-01
+
+- fix exception in MODBUS timeout callback
+
+## [0.9.0-RC1] - 2024-06-29
+
+- add asyncio log and debug mode
+- stop the HTTP server on shutdown gracefully
+- Synchronize regular MODBUS commands with the status of the inverter to prevent the inverter from crashing due to
+  unexpected packets. [#111](https://github.com/s-allius/tsun-gen3-proxy/issues/111)
+- GEN3: avoid sending MODBUS commands to the inverter during the inverter's reporting phase
+- GEN3: determine the connection timeout based on the connection state
+- GEN3: support more data encodings for DSP version V5.0.17 [#108](https://github.com/s-allius/tsun-gen3-proxy/issues/108)
+- detect dead connections [#100](https://github.com/s-allius/tsun-gen3-proxy/issues/100)
+- improve connection logging wirt a unique connection id
+- Add healthcheck, readiness and liveness checks [#91](https://github.com/s-allius/tsun-gen3-proxy/issues/91)
+- MODBUS close handler releases internal resource [#93](https://github.com/s-allius/tsun-gen3-proxy/issues/93)
+- add exception handling for message forwarding [#94](https://github.com/s-allius/tsun-gen3-proxy/issues/94)
+- GEN3: make timestamp handling stateless, to avoid blocking when the TSUN cloud is down [#56](https://github.com/s-allius/tsun-gen3-proxy/issues/56)
+- GEN3PLUS: dump invalid packages with wrong start or stop byte
+- label debug imagages als `debug`
+- print imgae build time during proxy start
+- add type annotations
+- improve async unit test and fix pytest warnings
+- run github tests even for pulls on issue branches
 
 ## [0.8.1] - 2024-06-21
 
@@ -24,7 +50,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - catch all OSError errors in the read loop
 - log Modbus traces with different log levels
 - add Modbus fifo and timeout handler
-- build version string in the same format as TSUN for GEN3 invterts
+- build version string in the same format as TSUN for GEN3 inverters
 - add graceful shutdown
 - parse Modbus values and store them in the database
 - add cron task to request the output power every minute
diff --git a/app/Dockerfile b/app/Dockerfile
index 30cdae8..68440d1 100644
--- a/app/Dockerfile
+++ b/app/Dockerfile
@@ -15,7 +15,7 @@ RUN apk upgrade --no-cache && \
 
 #
 # second stage for building wheels packages
-FROM base as builder
+FROM base AS builder
 
 # copy the dependencies file to the root dir and install requirements
 COPY ./requirements.txt /root/
@@ -26,7 +26,7 @@ RUN apk add --no-cache build-base && \
 
 #
 # third stage for our runtime image
-FROM base as runtime
+FROM base AS runtime
 ARG SERVICE_NAME
 ARG VERSION
 ARG UID
@@ -63,8 +63,8 @@ RUN python -m pip install --no-cache --no-index /root/wheels/* && \
 COPY --chmod=0700 entrypoint.sh /root/entrypoint.sh
 COPY config .
 COPY src .
-
-EXPOSE 5005
+RUN date > /build-date.txt
+EXPOSE 5005 8127 10000
 
 # command to run on container start
 ENTRYPOINT ["/root/entrypoint.sh"]
@@ -73,7 +73,7 @@ CMD [ "python3", "./server.py" ]
 
 LABEL org.opencontainers.image.title="TSUN Gen3 Proxy"
 LABEL org.opencontainers.image.authors="Stefan Allius"
-LABEL org.opencontainers.image.source https://github.com/s-allius/tsun-gen3-proxy
-LABEL org.opencontainers.image.description 'This proxy enables a reliable connection between TSUN third generation inverters (eg. TSOL MS600, MS800, MS2000) and an MQTT broker to integrate the inverter into typical home automations.'
+LABEL org.opencontainers.image.source=https://github.com/s-allius/tsun-gen3-proxy
+LABEL org.opencontainers.image.description='This proxy enables a reliable connection between TSUN third generation inverters (eg. TSOL MS600, MS800, MS2000) and an MQTT broker to integrate the inverter into typical home automations.'
 LABEL org.opencontainers.image.licenses="BSD-3-Clause"
 LABEL org.opencontainers.image.vendor="Stefan Allius"
diff --git a/app/build.sh b/app/build.sh
index c654c1c..dbb1f86 100755
--- a/app/build.sh
+++ b/app/build.sh
@@ -4,7 +4,7 @@
 # rc: release candidate build
 # rel: release build and push to ghcr.io
 # Note: for release build, you need to set GHCR_TOKEN
-# export GHCR_TOKEN=<YOUR_GITHUB_TOKEN> in your .profile
+# export GHCR_TOKEN=<YOUR_GITHUB_TOKEN> in your .zprofile
 # see also: https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry
 
 
@@ -31,7 +31,7 @@ fi
 
 echo version: $VERSION  build-date: $BUILD_DATE   image: $IMAGE
 if [[ $1 == debug ]];then
-docker build --build-arg "VERSION=${VERSION}" --build-arg environment=dev --build-arg "LOG_LVL=DEBUG" --label "org.opencontainers.image.created=${BUILD_DATE}" --label "org.opencontainers.image.version=${VERSION}" --label "org.opencontainers.image.revision=${BRANCH}" -t ${IMAGE}:dev app
+docker build --build-arg "VERSION=${VERSION}" --build-arg environment=dev --build-arg "LOG_LVL=DEBUG" --label "org.opencontainers.image.created=${BUILD_DATE}" --label "org.opencontainers.image.version=${VERSION}" --label "org.opencontainers.image.revision=${BRANCH}" -t ${IMAGE}:debug app
 elif [[ $1 == dev ]];then
 docker build --build-arg "VERSION=${VERSION}" --build-arg environment=production --label "org.opencontainers.image.created=${BUILD_DATE}" --label "org.opencontainers.image.version=${VERSION}" --label "org.opencontainers.image.revision=${BRANCH}" -t ${IMAGE}:dev app
 
@@ -39,16 +39,16 @@ elif [[ $1 == rc ]];then
 docker build --build-arg "VERSION=${VERSION}" --build-arg environment=production --label "org.opencontainers.image.created=${BUILD_DATE}" --label "org.opencontainers.image.version=${VERSION}" --label "org.opencontainers.image.revision=${BRANCH}" -t ${IMAGE}:rc -t ${IMAGE}:${VERSION} app
 echo 'login to ghcr.io'    
 echo $GHCR_TOKEN | docker login ghcr.io -u s-allius --password-stdin
-docker push ghcr.io/s-allius/tsun-gen3-proxy:rc
-docker push ghcr.io/s-allius/tsun-gen3-proxy:${VERSION}
+docker push -q ghcr.io/s-allius/tsun-gen3-proxy:rc
+docker push -q ghcr.io/s-allius/tsun-gen3-proxy:${VERSION}
 
 elif [[ $1 == rel ]];then
 docker build --no-cache --build-arg "VERSION=${VERSION}" --build-arg environment=production --label "org.opencontainers.image.created=${BUILD_DATE}" --label "org.opencontainers.image.version=${VERSION}" --label "org.opencontainers.image.revision=${BRANCH}" -t ${IMAGE}:latest -t ${IMAGE}:${MAJOR} -t ${IMAGE}:${VERSION} app
 echo 'login to ghcr.io'    
 echo $GHCR_TOKEN | docker login ghcr.io -u s-allius --password-stdin
-docker push ghcr.io/s-allius/tsun-gen3-proxy:latest
-docker push ghcr.io/s-allius/tsun-gen3-proxy:${MAJOR}
-docker push ghcr.io/s-allius/tsun-gen3-proxy:${VERSION}
+docker push -q ghcr.io/s-allius/tsun-gen3-proxy:latest
+docker push -q ghcr.io/s-allius/tsun-gen3-proxy:${MAJOR}
+docker push -q ghcr.io/s-allius/tsun-gen3-proxy:${VERSION}
 fi
 
 echo 'check docker-compose.yaml file'
diff --git a/app/entrypoint.sh b/app/entrypoint.sh
index 7698d41..b6f3d11 100644
--- a/app/entrypoint.sh
+++ b/app/entrypoint.sh
@@ -5,6 +5,7 @@ user="$(id -u)"
 echo "######################################################"
 echo "# prepare: '$SERVICE_NAME' Version:$VERSION"
 echo "# for running with UserID:$UID, GroupID:$GID"
+echo "# Image built: $(cat /build-date.txt) "
 echo "#"
 
 if [ "$user" = '0' ]; then
diff --git a/app/hardening_final.sh b/app/hardening_final.sh
index c6896bb..279e1b6 100644
--- a/app/hardening_final.sh
+++ b/app/hardening_final.sh
@@ -17,6 +17,5 @@ if [ "$environment" = "production" ] ; then \
   -name od -o \
   -name strings -o \
   -name su -o \
-  -name wget -o \
   \) -delete  \
 ; fi
diff --git a/app/requirements.txt b/app/requirements.txt
index b151101..ed9dcb0 100644
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -1,3 +1,4 @@
     aiomqtt==2.0.1
     schema==0.7.5
-    aiocron==1.8
\ No newline at end of file
+    aiocron==1.8
+    aiohttp==3.9.5
\ No newline at end of file
diff --git a/app/src/async_stream.py b/app/src/async_stream.py
index 17f5f59..f4b0ff9 100644
--- a/app/src/async_stream.py
+++ b/app/src/async_stream.py
@@ -1,44 +1,77 @@
+import asyncio
 import logging
 import traceback
-from messages import hex_dump_memory
+import time
+from asyncio import StreamReader, StreamWriter
+from messages import hex_dump_memory, State
+from typing import Self
+from itertools import count
 
+import gc
 logger = logging.getLogger('conn')
 
 
 class AsyncStream():
+    _ids = count(0)
+    MAX_PROC_TIME = 2
+    '''maximum processing time for a received msg in sec'''
+    MAX_START_TIME = 400
+    '''maximum time without a received msg in sec'''
+    MAX_INV_IDLE_TIME = 90
+    '''maximum time without a received msg from the inverter in sec'''
+    MAX_CLOUD_IDLE_TIME = 360
+    '''maximum time without a received msg from cloud side in sec'''
 
-    def __init__(self, reader, writer, addr) -> None:
+    def __init__(self, reader: StreamReader, writer: StreamWriter,
+                 addr) -> None:
         logger.debug('AsyncStream.__init__')
         self.reader = reader
         self.writer = writer
         self.addr = addr
         self.r_addr = ''
         self.l_addr = ''
+        self.conn_no = next(self._ids)
+        self.proc_start = None  # start processing start timestamp
+        self.proc_max = 0
 
-    async def server_loop(self, addr):
+    def __timeout(self) -> int:
+        if self.state == State.init:
+            to = self.MAX_START_TIME
+        else:
+            if self.server_side:
+                to = self.MAX_INV_IDLE_TIME
+            else:
+                to = self.MAX_CLOUD_IDLE_TIME
+        return to
+
+    async def server_loop(self, addr: str) -> None:
         '''Loop for receiving messages from the inverter (server-side)'''
-        logging.info(f'[{self.node_id}] Accept connection from {addr}')
+        logger.info(f'[{self.node_id}:{self.conn_no}] '
+                    f'Accept connection from {addr}')
         self.inc_counter('Inverter_Cnt')
         await self.loop()
         self.dec_counter('Inverter_Cnt')
-        logging.info(f'[{self.node_id}] Server loop stopped for'
-                     f' r{self.r_addr}')
+        logger.info(f'[{self.node_id}:{self.conn_no}] Server loop stopped for'
+                    f' r{self.r_addr}')
 
         # if the server connection closes, we also have to disconnect
         # the connection to te TSUN cloud
         if self.remoteStream:
-            logging.debug("disconnect client connection")
+            logger.info(f'[{self.node_id}:{self.conn_no}] disc client '
+                        f'connection: [{self.remoteStream.node_id}:'
+                        f'{self.remoteStream.conn_no}]')
             await self.remoteStream.disc()
         try:
             await self._async_publ_mqtt_proxy_stat('proxy')
         except Exception:
             pass
 
-    async def client_loop(self, addr):
+    async def client_loop(self, addr: str) -> None:
         '''Loop for receiving messages from the TSUN cloud (client-side)'''
         clientStream = await self.remoteStream.loop()
-        logging.info(f'[{self.node_id}] Client loop stopped for'
-                     f' l{clientStream.l_addr}')
+        logger.info(f'[{clientStream.node_id}:{clientStream.conn_no}] '
+                    'Client loop stopped for'
+                    f' l{clientStream.l_addr}')
 
         # if the client connection closes, we don't touch the server
         # connection. Instead we erase the client connection stream,
@@ -54,28 +87,45 @@ class AsyncStream():
             # than erase client connection
             self.remoteStream = None
 
-    async def loop(self):
+    async def loop(self) -> Self:
+        """Async loop handler for precessing all received messages"""
         self.r_addr = self.writer.get_extra_info('peername')
         self.l_addr = self.writer.get_extra_info('sockname')
-
+        self.proc_start = time.time()
         while True:
             try:
-                await self.__async_read()
+                proc = time.time() - self.proc_start
+                if proc > self.proc_max:
+                    self.proc_max = proc
+                self.proc_start = None
+                dead_conn_to = self.__timeout()
+                await asyncio.wait_for(self.__async_read(),
+                                       dead_conn_to)
 
                 if self.unique_id:
                     await self.async_write()
                     await self.__async_forward()
                     await self.async_publ_mqtt()
 
+            except asyncio.TimeoutError:
+                logger.warning(f'[{self.node_id}:{self.conn_no}] Dead '
+                               f'connection timeout ({dead_conn_to}s) '
+                               f'for {self.l_addr}')
+                await self.disc()
+                self.close()
+                return self
+
             except OSError as error:
-                logger.error(f'[{self.node_id}] {error} for l{self.l_addr} | '
+                logger.error(f'[{self.node_id}:{self.conn_no}] '
+                             f'{error} for l{self.l_addr} | '
                              f'r{self.r_addr}')
                 await self.disc()
                 self.close()
                 return self
 
             except RuntimeError as error:
-                logger.info(f"[{self.node_id}] {error} for {self.l_addr}")
+                logger.info(f'[{self.node_id}:{self.conn_no}] '
+                            f'{error} for {self.l_addr}')
                 await self.disc()
                 self.close()
                 return self
@@ -86,31 +136,8 @@ class AsyncStream():
                     f"Exception for {self.addr}:\n"
                     f"{traceback.format_exc()}")
 
-    async def disc(self) -> None:
-        if self.writer.is_closing():
-            return
-        logger.debug(f'AsyncStream.disc() l{self.l_addr} | r{self.r_addr}')
-        self.writer.close()
-        await self.writer.wait_closed()
-
-    def close(self):
-        if self.writer.is_closing():
-            return
-        logger.debug(f'AsyncStream.close() l{self.l_addr} | r{self.r_addr}')
-        self.writer.close()
-
-    '''
-    Our private methods
-    '''
-    async def __async_read(self) -> None:
-        data = await self.reader.read(4096)
-        if data:
-            self._recv_buffer += data
-            self.read()                # call read in parent class
-        else:
-            raise RuntimeError("Peer closed.")
-
-    async def async_write(self, headline='Transmit to ') -> None:
+    async def async_write(self, headline: str = 'Transmit to ') -> None:
+        """Async write handler to transmit the send_buffer"""
         if self._send_buffer:
             hex_dump_memory(logging.INFO, f'{headline}{self.addr}:',
                             self._send_buffer, len(self._send_buffer))
@@ -118,8 +145,57 @@ class AsyncStream():
             await self.writer.drain()
             self._send_buffer = bytearray(0)  # self._send_buffer[sent:]
 
+    async def disc(self) -> None:
+        """Async disc handler for graceful disconnect"""
+        if self.writer.is_closing():
+            return
+        logger.debug(f'AsyncStream.disc() l{self.l_addr} | r{self.r_addr}')
+        self.writer.close()
+        await self.writer.wait_closed()
+
+    def close(self) -> None:
+        """close handler for a no waiting disconnect
+
+           hint: must be called before releasing the connection instance
+        """
+        self.reader.feed_eof()          # abort awaited read
+        if self.writer.is_closing():
+            return
+        logger.debug(f'AsyncStream.close() l{self.l_addr} | r{self.r_addr}')
+        self.writer.close()
+
+    def healthy(self) -> bool:
+        elapsed = 0
+        if self.proc_start is not None:
+            elapsed = time.time() - self.proc_start
+        if self.state == State.closed or elapsed > self.MAX_PROC_TIME:
+            logging.debug(f'[{self.node_id}:{self.conn_no}:'
+                          f'{type(self).__name__}]'
+                          f' act:{round(1000*elapsed)}ms'
+                          f' max:{round(1000*self.proc_max)}ms')
+            logging.debug(f'Healthy()) refs: {gc.get_referrers(self)}')
+        return elapsed < 5
+
+    '''
+    Our private methods
+    '''
+    async def __async_read(self) -> None:
+        """Async read handler to read received data from TCP stream"""
+        data = await self.reader.read(4096)
+        if data:
+            self.proc_start = time.time()
+            self._recv_buffer += data
+            wait = self.read()                # call read in parent class
+            if wait > 0:
+                await asyncio.sleep(wait)
+        else:
+            raise RuntimeError("Peer closed.")
+
     async def __async_forward(self) -> None:
-        if self._forward_buffer:
+        """forward handler transmits data over the remote connection"""
+        if not self._forward_buffer:
+            return
+        try:
             if not self.remoteStream:
                 await self.async_create_remote()
                 if self.remoteStream:
@@ -136,6 +212,30 @@ class AsyncStream():
                 await self.remoteStream.writer.drain()
                 self._forward_buffer = bytearray(0)
 
+        except OSError as error:
+            if self.remoteStream:
+                rmt = self.remoteStream
+                self.remoteStream = None
+                logger.error(f'[{rmt.node_id}:{rmt.conn_no}] Fwd: {error} for '
+                             f'l{rmt.l_addr} | r{rmt.r_addr}')
+                await rmt.disc()
+                rmt.close()
+
+        except RuntimeError as error:
+            if self.remoteStream:
+                rmt = self.remoteStream
+                self.remoteStream = None
+                logger.info(f'[{rmt.node_id}:{rmt.conn_no}] '
+                            f'Fwd: {error} for {rmt.l_addr}')
+                await rmt.disc()
+                rmt.close()
+
+        except Exception:
+            self.inc_counter('SW_Exception')
+            logger.error(
+                f"Fwd Exception for {self.addr}:\n"
+                f"{traceback.format_exc()}")
+
     def __del__(self):
         logger.debug(
             f"AsyncStream.__del__  l{self.l_addr} | r{self.r_addr}")
diff --git a/app/src/config.py b/app/src/config.py
index e1ef749..8121c86 100644
--- a/app/src/config.py
+++ b/app/src/config.py
@@ -84,7 +84,7 @@ class Config():
         )
 
     @classmethod
-    def class_init(cls):  # pragma: no cover
+    def class_init(cls) -> None | str:  # pragma: no cover
         try:
             # make the default config transparaent by copying it
             # in the config.example file
@@ -94,7 +94,9 @@ class Config():
                          "config/config.example.toml")
         except Exception:
             pass
-        cls.read()
+        err_str = cls.read()
+        del cls.conf_schema
+        return err_str
 
     @classmethod
     def _read_config_file(cls) -> dict:  # pragma: no cover
diff --git a/app/src/gen3/connection_g3.py b/app/src/gen3/connection_g3.py
index c93156e..7e7b96d 100644
--- a/app/src/gen3/connection_g3.py
+++ b/app/src/gen3/connection_g3.py
@@ -1,5 +1,6 @@
 import logging
 # import gc
+from asyncio import StreamReader, StreamWriter
 from async_stream import AsyncStream
 from gen3.talent import Talent
 
@@ -8,12 +9,13 @@ logger = logging.getLogger('conn')
 
 class ConnectionG3(AsyncStream, Talent):
 
-    def __init__(self, reader, writer, addr, remote_stream, server_side: bool,
+    def __init__(self, reader: StreamReader, writer: StreamWriter,
+                 addr, remote_stream: 'ConnectionG3', server_side: bool,
                  id_str=b'') -> None:
         AsyncStream.__init__(self, reader, writer, addr)
         Talent.__init__(self, server_side, id_str)
 
-        self.remoteStream = remote_stream
+        self.remoteStream: 'ConnectionG3' = remote_stream
 
     '''
     Our puplic methods
@@ -29,6 +31,10 @@ class ConnectionG3(AsyncStream, Talent):
     async def async_publ_mqtt(self) -> None:
         pass
 
+    def healthy(self) -> bool:
+        logger.debug('ConnectionG3 healthy()')
+        return AsyncStream.healthy(self)
+
     '''
     Our private methods
     '''
diff --git a/app/src/gen3/infos_g3.py b/app/src/gen3/infos_g3.py
index 0dc6a35..04e5c69 100644
--- a/app/src/gen3/infos_g3.py
+++ b/app/src/gen3/infos_g3.py
@@ -132,11 +132,24 @@ class InfosG3(Infos):
                                                            errors='replace')
                 ind += str_len+1
 
+            elif data_type == 0x00:  # 'Nul' -> end
+                i = elms  # abort the loop
+
+            elif data_type == 0x41:  # 'A' -> Nop ??
+                # result = struct.unpack_from('!l', buf, ind)[0]
+                ind += 0
+                i += 1
+                continue
+
+            elif data_type == 0x42:  # 'B' -> byte, int8
+                result = struct.unpack_from('!B', buf, ind)[0]
+                ind += 1
+
             elif data_type == 0x49:  # 'I' -> int32
                 result = struct.unpack_from('!l', buf, ind)[0]
                 ind += 4
 
-            elif data_type == 0x53:  # 'S' -> short
+            elif data_type == 0x53:  # 'S' -> short, int16
                 result = struct.unpack_from('!h', buf, ind)[0]
                 ind += 2
 
@@ -144,13 +157,14 @@ class InfosG3(Infos):
                 result = round(struct.unpack_from('!f', buf, ind)[0], 2)
                 ind += 4
 
-            elif data_type == 0x4c:  # 'L' -> int64
+            elif data_type == 0x4c:  # 'L' -> long, int64
                 result = struct.unpack_from('!q', buf, ind)[0]
                 ind += 8
 
             else:
                 self.inc_counter('Invalid_Data_Type')
                 logging.error(f"Infos.parse: data_type: {data_type}"
+                              f" @0x{addr:04x} No:{i}"
                               " not supported")
                 return
 
diff --git a/app/src/gen3/inverter_g3.py b/app/src/gen3/inverter_g3.py
index 1930f0e..a20dc77 100644
--- a/app/src/gen3/inverter_g3.py
+++ b/app/src/gen3/inverter_g3.py
@@ -1,7 +1,8 @@
-import asyncio
 import logging
 import traceback
 import json
+import asyncio
+from asyncio import StreamReader, StreamWriter
 from config import Config
 from inverter import Inverter
 from gen3.connection_g3 import ConnectionG3
@@ -44,7 +45,7 @@ class InverterG3(Inverter, ConnectionG3):
                  destroyed
     '''
 
-    def __init__(self, reader, writer, addr):
+    def __init__(self, reader: StreamReader, writer: StreamWriter, addr):
         super().__init__(reader, writer, addr, None, True)
         self.__ha_restarts = -1
 
@@ -56,11 +57,14 @@ class InverterG3(Inverter, ConnectionG3):
         addr = (host, port)
 
         try:
-            logging.info(f'[{self.node_id}] Connected to {addr}')
+            logging.info(f'[{self.node_id}] Connect to {addr}')
             connect = asyncio.open_connection(host, port)
             reader, writer = await connect
             self.remoteStream = ConnectionG3(reader, writer, addr, self,
                                              False, self.id_str)
+            logging.info(f'[{self.remoteStream.node_id}:'
+                         f'{self.remoteStream.conn_no}] '
+                         f'Connected to {addr}')
             asyncio.create_task(self.client_loop(addr))
 
         except (ConnectionRefusedError, TimeoutError) as error:
@@ -121,7 +125,7 @@ class InverterG3(Inverter, ConnectionG3):
     def close(self) -> None:
         logging.debug(f'InverterG3.close() l{self.l_addr} | r{self.r_addr}')
         super().close()         # call close handler in the parent class
-#        logger.debug (f'Inverter refs: {gc.get_referrers(self)}')
+#         logging.info(f'Inverter refs: {gc.get_referrers(self)}')
 
     def __del__(self):
         logging.debug("InverterG3.__del__")
diff --git a/app/src/gen3/talent.py b/app/src/gen3/talent.py
index 18a336f..c6b0091 100644
--- a/app/src/gen3/talent.py
+++ b/app/src/gen3/talent.py
@@ -4,13 +4,15 @@ import time
 from datetime import datetime
 
 if __name__ == "app.src.gen3.talent":
-    from app.src.messages import hex_dump_memory, Message
+    from app.src.messages import hex_dump_memory, Message, State
     from app.src.modbus import Modbus
+    from app.src.my_timer import Timer
     from app.src.config import Config
     from app.src.gen3.infos_g3 import InfosG3
 else:  # pragma: no cover
-    from messages import hex_dump_memory, Message
+    from messages import hex_dump_memory, Message, State
     from modbus import Modbus
+    from my_timer import Timer
     from config import Config
     from gen3.infos_g3 import InfosG3
 
@@ -35,12 +37,16 @@ class Control:
 
 
 class Talent(Message):
+    MB_START_TIMEOUT = 40
+    MB_REGULAR_TIMEOUT = 60
+
     def __init__(self, server_side: bool, id_str=b''):
         super().__init__(server_side, self.send_modbus_cb, mb_timeout=11)
         self.await_conn_resp_cnt = 0
         self.id_str = id_str
         self.contact_name = b''
         self.contact_mail = b''
+        self.ts_offset = 0        # time offset between tsun cloud and local
         self.db = InfosG3()
         self.switch = {
             0x00: self.msg_contact_info,
@@ -64,19 +70,20 @@ class Talent(Message):
         }
         self.modbus_elms = 0    # for unit tests
         self.node_id = 'G3'     # will be overwritten in __set_serial_no
-        # self.forwarding = Config.get('tsun')['enabled']
+        self.mb_timer = Timer(self.mb_timout_cb, self.node_id)
 
     '''
     Our puplic methods
     '''
     def close(self) -> None:
         logging.debug('Talent.close()')
-        # we have refernces to methods of this class in self.switch
+        # we have references to methods of this class in self.switch
         # so we have to erase self.switch, otherwise this instance can't be
         # deallocated by the garbage collector ==> we get a memory leak
         self.switch.clear()
         self.log_lvl.clear()
-        self.state = self.STATE_CLOSED
+        self.state = State.closed
+        self.mb_timer.close()
         super().close()
 
     def __set_serial_no(self, serial_no: str):
@@ -105,7 +112,7 @@ class Talent(Message):
 
             self.unique_id = serial_no
 
-    def read(self) -> None:
+    def read(self) -> float:
         self._read()
 
         if not self.header_valid:
@@ -113,6 +120,9 @@ class Talent(Message):
 
         if self.header_valid and len(self._recv_buffer) >= (self.header_len +
                                                             self.data_len):
+            if self.state == State.init:
+                self.state = State.received     # received 1st package
+
             log_lvl = self.log_lvl.get(self.msg_id, logging.WARNING)
             if callable(log_lvl):
                 log_lvl = log_lvl()
@@ -123,7 +133,7 @@ class Talent(Message):
             self.__set_serial_no(self.id_str.decode("utf-8"))
             self.__dispatch_msg()
             self.__flush_recv_msg()
-        return
+        return 0.5  # wait 500ms before sending a response
 
     def forward(self, buffer, buflen) -> None:
         tsun = Config.get('tsun')
@@ -140,9 +150,9 @@ class Talent(Message):
         return
 
     def send_modbus_cb(self, modbus_pdu: bytearray, log_lvl: int, state: str):
-        if self.state != self.STATE_UP:
-            logger.warn(f'[{self.node_id}] ignore MODBUS cmd,'
-                        ' cause the state is not UP anymore')
+        if self.state != State.up:
+            logger.warning(f'[{self.node_id}] ignore MODBUS cmd,'
+                           ' cause the state is not UP anymore')
             return
 
         self.__build_header(0x70, 0x77)
@@ -156,13 +166,25 @@ class Talent(Message):
         self.writer.write(self._send_buffer)
         self._send_buffer = bytearray(0)  # self._send_buffer[sent:]
 
-    async def send_modbus_cmd(self, func, addr, val, log_lvl) -> None:
-        if self.state != self.STATE_UP:
+    def _send_modbus_cmd(self, func, addr, val, log_lvl) -> None:
+        if self.state != State.up:
             logger.log(log_lvl, f'[{self.node_id}] ignore MODBUS cmd,'
                        ' as the state is not UP')
             return
         self.mb.build_msg(Modbus.INV_ADDR, func, addr, val, log_lvl)
 
+    async def send_modbus_cmd(self, func, addr, val, log_lvl) -> None:
+        self._send_modbus_cmd(func, addr, val, log_lvl)
+
+    def mb_timout_cb(self, exp_cnt):
+        self.mb_timer.start(self.MB_REGULAR_TIMEOUT)
+
+        if 0 == (exp_cnt % 30):
+            # logging.info("Regular Modbus Status request")
+            self._send_modbus_cmd(Modbus.READ_REGS, 0x2007, 2, logging.DEBUG)
+        else:
+            self._send_modbus_cmd(Modbus.READ_REGS, 0x3008, 21, logging.DEBUG)
+
     def _init_new_client_conn(self) -> bool:
         contact_name = self.contact_name
         contact_mail = self.contact_mail
@@ -204,6 +226,24 @@ class Talent(Message):
             ts = (datetime.now() - datetime(1970, 1, 1)).total_seconds()
         return round(ts*1000)
 
+    def _update_header(self, _forward_buffer):
+        '''update header for message before forwarding,
+        add time offset to timestamp'''
+        _len = len(_forward_buffer)
+        result = struct.unpack_from('!lB', _forward_buffer, 0)
+        id_len = result[1]    # len of variable id string
+        if _len < 2*id_len + 21:
+            return
+
+        result = struct.unpack_from('!B', _forward_buffer, id_len+6)
+        msg_code = result[0]
+        if msg_code == 0x71 or msg_code == 0x04:
+            result = struct.unpack_from('!q', _forward_buffer, 13+2*id_len)
+            ts = result[0] + self.ts_offset
+            logger.debug(f'offset: {self.ts_offset:08x}'
+                         f'  proxy-time: {ts:08x}')
+            struct.pack_into('!q', _forward_buffer, 13+2*id_len, ts)
+
     # check if there is a complete header in the buffer, parse it
     # and set
     #   self.header_len
@@ -256,7 +296,8 @@ class Talent(Message):
         fnc = self.switch.get(self.msg_id, self.msg_unknown)
         if self.unique_id:
             logger.info(self.__flow_str(self.server_side, 'rx') +
-                        f' Ctl: {int(self.ctrl):#02x} Msg: {fnc.__name__!r}')
+                        f' Ctl: {int(self.ctrl):#02x} ({self.state}) '
+                        f'Msg: {fnc.__name__!r}')
             fnc()
         else:
             logger.info(self.__flow_str(self.server_side, 'drop') +
@@ -305,39 +346,37 @@ class Talent(Message):
         return True
 
     def msg_get_time(self):
-        tsun = Config.get('tsun')
-        if tsun['enabled']:
-            if self.ctrl.is_ind():
-                if self.data_len >= 8:
-                    ts = self._timestamp()
-                    result = struct.unpack_from('!q', self._recv_buffer,
-                                                self.header_len)
-                    logger.debug(f'tsun-time: {result[0]:08x}'
-                                 f'  proxy-time: {ts:08x}')
-            else:
-                logger.warning('Unknown Ctrl')
-                self.inc_counter('Unknown_Ctrl')
-            self.forward(self._recv_buffer, self.header_len+self.data_len)
+        if self.ctrl.is_ind():
+            if self.data_len == 0:
+                self.state = State.pend     # block MODBUS cmds
+                self.mb_timer.start(self.MB_START_TIMEOUT)
+                ts = self._timestamp()
+                logger.debug(f'time: {ts:08x}')
+                self.__build_header(0x91)
+                self._send_buffer += struct.pack('!q', ts)
+                self.__finish_send_msg()
+
+            elif self.data_len >= 8:
+                ts = self._timestamp()
+                result = struct.unpack_from('!q', self._recv_buffer,
+                                            self.header_len)
+                self.ts_offset = result[0]-ts
+                logger.debug(f'tsun-time: {int(result[0]):08x}'
+                             f'  proxy-time: {ts:08x}'
+                             f'  offset: {self.ts_offset}')
+                return  # ignore received response
         else:
-            if self.ctrl.is_ind():
-                if self.data_len == 0:
-                    ts = self._timestamp()
-                    logger.debug(f'time: {ts:08x}')
+            logger.warning('Unknown Ctrl')
+            self.inc_counter('Unknown_Ctrl')
 
-                    self.__build_header(0x91)
-                    self._send_buffer += struct.pack('!q', ts)
-                    self.__finish_send_msg()
-
-            else:
-                logger.warning('Unknown Ctrl')
-                self.inc_counter('Unknown_Ctrl')
+        self.forward(self._recv_buffer, self.header_len+self.data_len)
 
     def parse_msg_header(self):
         result = struct.unpack_from('!lB', self._recv_buffer, self.header_len)
 
         data_id = result[0]    # len of complete message
         id_len = result[1]     # len of variable id string
-        logger.debug(f'Data_ID: {data_id}   id_len:  {id_len}')
+        logger.debug(f'Data_ID: 0x{data_id:08x}   id_len:  {id_len}')
 
         msg_hdr_len = 5+id_len+9
 
@@ -356,7 +395,6 @@ class Talent(Message):
             self._send_buffer += b'\x01'
             self.__finish_send_msg()
             self.__process_data()
-            self.state = self.STATE_UP
 
         elif self.ctrl.is_resp():
             return  # ignore received response
@@ -372,7 +410,7 @@ class Talent(Message):
             self._send_buffer += b'\x01'
             self.__finish_send_msg()
             self.__process_data()
-            self.state = self.STATE_UP
+            self.state = State.up  # allow MODBUS cmds
 
         elif self.ctrl.is_resp():
             return  # ignore received response
@@ -432,8 +470,13 @@ class Talent(Message):
             else:
                 self.inc_counter('Invalid_Msg_Format')
         elif self.ctrl.is_ind():
-            # logger.debug(f'Modbus Ind  MsgLen: {modbus_len}')
             self.modbus_elms = 0
+            # logger.debug(f'Modbus Ind  MsgLen: {modbus_len}')
+            if not self.server_side:
+                logger.warning('Unknown Message')
+                self.inc_counter('Unknown_Msg')
+                return
+
             for key, update, _ in self.mb.recv_resp(self.db, data[
                     hdr_len:],
                     self.node_id):
diff --git a/app/src/gen3plus/connection_g3p.py b/app/src/gen3plus/connection_g3p.py
index a9362ce..352ba5e 100644
--- a/app/src/gen3plus/connection_g3p.py
+++ b/app/src/gen3plus/connection_g3p.py
@@ -1,5 +1,6 @@
 import logging
 # import gc
+from asyncio import StreamReader, StreamWriter
 from async_stream import AsyncStream
 from gen3plus.solarman_v5 import SolarmanV5
 
@@ -8,12 +9,13 @@ logger = logging.getLogger('conn')
 
 class ConnectionG3P(AsyncStream, SolarmanV5):
 
-    def __init__(self, reader, writer, addr, remote_stream,
+    def __init__(self, reader: StreamReader, writer: StreamWriter,
+                 addr, remote_stream: 'ConnectionG3P',
                  server_side: bool) -> None:
         AsyncStream.__init__(self, reader, writer, addr)
         SolarmanV5.__init__(self, server_side)
 
-        self.remoteStream = remote_stream
+        self.remoteStream: 'ConnectionG3P' = remote_stream
 
     '''
     Our puplic methods
@@ -29,6 +31,10 @@ class ConnectionG3P(AsyncStream, SolarmanV5):
     async def async_publ_mqtt(self) -> None:
         pass
 
+    def healthy(self) -> bool:
+        logger.debug('ConnectionG3P healthy()')
+        return AsyncStream.healthy(self)
+
     '''
     Our private methods
     '''
diff --git a/app/src/gen3plus/inverter_g3p.py b/app/src/gen3plus/inverter_g3p.py
index 487fe1e..74c9b6b 100644
--- a/app/src/gen3plus/inverter_g3p.py
+++ b/app/src/gen3plus/inverter_g3p.py
@@ -1,7 +1,8 @@
-import asyncio
 import logging
 import traceback
 import json
+import asyncio
+from asyncio import StreamReader, StreamWriter
 from config import Config
 from inverter import Inverter
 from gen3plus.connection_g3p import ConnectionG3P
@@ -44,7 +45,7 @@ class InverterG3P(Inverter, ConnectionG3P):
                  destroyed
     '''
 
-    def __init__(self, reader, writer, addr):
+    def __init__(self, reader: StreamReader, writer: StreamWriter, addr):
         super().__init__(reader, writer, addr, None, True)
         self.__ha_restarts = -1
 
@@ -56,11 +57,14 @@ class InverterG3P(Inverter, ConnectionG3P):
         addr = (host, port)
 
         try:
-            logging.info(f'[{self.node_id}] Connected to {addr}')
+            logging.info(f'[{self.node_id}] Connect to {addr}')
             connect = asyncio.open_connection(host, port)
             reader, writer = await connect
             self.remoteStream = ConnectionG3P(reader, writer, addr, self,
                                               False)
+            logging.info(f'[{self.remoteStream.node_id}:'
+                         f'{self.remoteStream.conn_no}] '
+                         f'Connected to {addr}')
             asyncio.create_task(self.client_loop(addr))
 
         except (ConnectionRefusedError, TimeoutError) as error:
diff --git a/app/src/gen3plus/solarman_v5.py b/app/src/gen3plus/solarman_v5.py
index a498a2b..432ec2e 100644
--- a/app/src/gen3plus/solarman_v5.py
+++ b/app/src/gen3plus/solarman_v5.py
@@ -6,15 +6,17 @@ import asyncio
 from datetime import datetime
 
 if __name__ == "app.src.gen3plus.solarman_v5":
-    from app.src.messages import hex_dump_memory, Message
+    from app.src.messages import hex_dump_memory, Message, State
     from app.src.modbus import Modbus
+    from app.src.my_timer import Timer
     from app.src.config import Config
     from app.src.gen3plus.infos_g3p import InfosG3P
     from app.src.infos import Register
 else:  # pragma: no cover
-    from messages import hex_dump_memory, Message
+    from messages import hex_dump_memory, Message, State
     from config import Config
     from modbus import Modbus
+    from my_timer import Timer
     from gen3plus.infos_g3p import InfosG3P
     from infos import Register
 # import traceback
@@ -51,6 +53,8 @@ class Sequence():
 class SolarmanV5(Message):
     AT_CMD = 1
     MB_RTU_CMD = 2
+    MB_START_TIMEOUT = 40
+    MB_REGULAR_TIMEOUT = 60
 
     def __init__(self, server_side: bool):
         super().__init__(server_side, self.send_modbus_cb, mb_timeout=5)
@@ -123,19 +127,20 @@ class SolarmanV5(Message):
             self.at_acl = g3p_cnf['at_acl']
 
         self.node_id = 'G3P'  # will be overwritten in __set_serial_no
-        # self.forwarding = Config.get('solarman')['enabled']
+        self.mb_timer = Timer(self.mb_timout_cb, self.node_id)
 
     '''
     Our puplic methods
     '''
     def close(self) -> None:
         logging.debug('Solarman.close()')
-        # we have refernces to methods of this class in self.switch
+        # we have references to methods of this class in self.switch
         # so we have to erase self.switch, otherwise this instance can't be
         # deallocated by the garbage collector ==> we get a memory leak
         self.switch.clear()
         self.log_lvl.clear()
-        self.state = self.STATE_CLOSED
+        self.state = State.closed
+        self.mb_timer.close()
         super().close()
 
     def __set_serial_no(self, snr: int):
@@ -169,7 +174,7 @@ class SolarmanV5(Message):
 
             self.unique_id = serial_no
 
-    def read(self) -> None:
+    def read(self) -> float:
         self._read()
 
         if not self.header_valid:
@@ -184,10 +189,13 @@ class SolarmanV5(Message):
                             self._recv_buffer, self.header_len+self.data_len+2)
             if self.__trailer_is_ok(self._recv_buffer, self.header_len
                                     + self.data_len + 2):
+                if self.state == State.init:
+                    self.state = State.received
+
                 self.__set_serial_no(self.snr)
                 self.__dispatch_msg()
             self.__flush_recv_msg()
-        return
+        return 0  # wait 0s before sending a response
 
     def forward(self, buffer, buflen) -> None:
         tsun = Config.get('solarman')
@@ -253,6 +261,10 @@ class SolarmanV5(Message):
         self.snr = result[4]
 
         if start != 0xA5:
+            hex_dump_memory(logging.ERROR,
+                            'Drop packet w invalid start byte from'
+                            f' {self.addr}:', buf, buf_len)
+
             self.inc_counter('Invalid_Msg_Format')
             # erase broken recv buffer
             self._recv_buffer = bytearray()
@@ -264,6 +276,9 @@ class SolarmanV5(Message):
         crc = buf[self.data_len+11]
         stop = buf[self.data_len+12]
         if stop != 0x15:
+            hex_dump_memory(logging.ERROR,
+                            'Drop packet w invalid stop byte from '
+                            f'{self.addr}:', buf, buf_len)
             self.inc_counter('Invalid_Msg_Format')
             if len(self._recv_buffer) > (self.data_len+13):
                 next_start = buf[self.data_len+13]
@@ -338,9 +353,9 @@ class SolarmanV5(Message):
         self.__finish_send_msg()
 
     def send_modbus_cb(self, pdu: bytearray, log_lvl: int, state: str):
-        if self.state != self.STATE_UP:
-            logger.warn(f'[{self.node_id}] ignore MODBUS cmd,'
-                        ' cause the state is not UP anymore')
+        if self.state != State.up:
+            logger.warning(f'[{self.node_id}] ignore MODBUS cmd,'
+                           ' cause the state is not UP anymore')
             return
         self.__build_header(0x4510)
         self._send_buffer += struct.pack('<BHLLL', self.MB_RTU_CMD,
@@ -352,21 +367,33 @@ class SolarmanV5(Message):
         self.writer.write(self._send_buffer)
         self._send_buffer = bytearray(0)  # self._send_buffer[sent:]
 
-    async def send_modbus_cmd(self, func, addr, val, log_lvl) -> None:
-        if self.state != self.STATE_UP:
+    def _send_modbus_cmd(self, func, addr, val, log_lvl) -> None:
+        if self.state != State.up:
             logger.log(log_lvl, f'[{self.node_id}] ignore MODBUS cmd,'
                        ' as the state is not UP')
             return
         self.mb.build_msg(Modbus.INV_ADDR, func, addr, val, log_lvl)
 
+    async def send_modbus_cmd(self, func, addr, val, log_lvl) -> None:
+        self._send_modbus_cmd(func, addr, val, log_lvl)
+
+    def mb_timout_cb(self, exp_cnt):
+        self.mb_timer.start(self.MB_REGULAR_TIMEOUT)
+
+        self._send_modbus_cmd(Modbus.READ_REGS, 0x3008, 21, logging.DEBUG)
+
+        if 0 == (exp_cnt % 30):
+            # logging.info("Regular Modbus Status request")
+            self._send_modbus_cmd(Modbus.READ_REGS, 0x2007, 2, logging.DEBUG)
+
     def at_cmd_forbidden(self, cmd: str, connection: str) -> bool:
         return not cmd.startswith(tuple(self.at_acl[connection]['allow'])) or \
                 cmd.startswith(tuple(self.at_acl[connection]['block']))
 
     async def send_at_cmd(self, AT_cmd: str) -> None:
-        if self.state != self.STATE_UP:
-            logger.warn(f'[{self.node_id}] ignore AT+ cmd,'
-                        ' as the state is not UP')
+        if self.state != State.up:
+            logger.warning(f'[{self.node_id}] ignore AT+ cmd,'
+                           ' as the state is not UP')
             return
         AT_cmd = AT_cmd.strip()
 
@@ -375,8 +402,7 @@ class SolarmanV5(Message):
             node_id = self.node_id
             key = 'at_resp'
             logger.info(f'{key}: {data_json}')
-            asyncio.ensure_future(
-                self.publish_mqtt(f'{self.entity_prfx}{node_id}{key}', data_json))  # noqa: E501
+            await self.mqtt.publish(f'{self.entity_prfx}{node_id}{key}', data_json)  # noqa: E501
             return
 
         self.forward_at_cmd_resp = False
@@ -465,7 +491,9 @@ class SolarmanV5(Message):
         self.__process_data(ftype)
         self.__forward_msg()
         self.__send_ack_rsp(0x1210, ftype)
-        self.state = self.STATE_UP
+        if self.state is not State.up:
+            self.state = State.up
+            self.mb_timer.start(self.MB_START_TIMEOUT)
 
     def msg_sync_start(self):
         data = self._recv_buffer[self.header_len:]
@@ -499,13 +527,15 @@ class SolarmanV5(Message):
                                              __forward_msg):
                 self.inc_counter('Modbus_Command')
             else:
+                logger.error('Invalid Modbus Msg')
                 self.inc_counter('Invalid_Msg_Format')
             return
 
         self.__forward_msg()
 
-    async def publish_mqtt(self, key, data):
-        await self.mqtt.publish(key, data)  # pragma: no cover
+    def publish_mqtt(self, key, data):
+        asyncio.ensure_future(
+            self.mqtt.publish(key, data))
 
     def get_cmd_rsp_log_lvl(self) -> int:
         ftype = self._recv_buffer[self.header_len]
@@ -529,8 +559,7 @@ class SolarmanV5(Message):
                 node_id = self.node_id
                 key = 'at_resp'
                 logger.info(f'{key}: {data_json}')
-                asyncio.ensure_future(
-                    self.publish_mqtt(f'{self.entity_prfx}{node_id}{key}', data_json))  # noqa: E501
+                self.publish_mqtt(f'{self.entity_prfx}{node_id}{key}', data_json)  # noqa: E501
                 return
         elif ftype == self.MB_RTU_CMD:
             valid = data[1]
@@ -561,7 +590,9 @@ class SolarmanV5(Message):
 
         self.__forward_msg()
         self.__send_ack_rsp(0x1710, ftype)
-        self.state = self.STATE_UP
+        if self.state is not State.up:
+            self.state = State.up
+            self.mb_timer.start(self.MB_START_TIMEOUT)
 
     def msg_sync_end(self):
         data = self._recv_buffer[self.header_len:]
diff --git a/app/src/infos.py b/app/src/infos.py
index ee5a38a..a32e5b7 100644
--- a/app/src/infos.py
+++ b/app/src/infos.py
@@ -343,7 +343,7 @@ class Infos:
         dict[counter] -= 1
 
     def ha_proxy_confs(self, ha_prfx: str, node_id: str, snr: str) \
-            -> Generator[tuple[dict, str], None, None]:
+            -> Generator[tuple[str, str, str, str], None, None]:
         '''Generator function yields json register struct for home-assistant
         auto configuration and the unique entity string, for all proxy
         registers
diff --git a/app/src/logging.ini b/app/src/logging.ini
index 8bbc7da..34db695 100644
--- a/app/src/logging.ini
+++ b/app/src/logging.ini
@@ -1,5 +1,5 @@
 [loggers]
-keys=root,tracer,mesg,conn,data,mqtt
+keys=root,tracer,mesg,conn,data,mqtt,asyncio
 
 [handlers]
 keys=console_handler,file_handler_name1,file_handler_name2
@@ -24,6 +24,12 @@ handlers=console_handler,file_handler_name1
 propagate=0
 qualname=mqtt
 
+[logger_asyncio]
+level=INFO
+handlers=console_handler,file_handler_name1
+propagate=0
+qualname=asyncio
+
 [logger_data]
 level=DEBUG
 handlers=file_handler_name1
diff --git a/app/src/messages.py b/app/src/messages.py
index 6736b0b..bec2994 100644
--- a/app/src/messages.py
+++ b/app/src/messages.py
@@ -1,6 +1,7 @@
 import logging
 import weakref
-from typing import Callable
+from typing import Callable, Generator
+from enum import Enum
 
 
 if __name__ == "app.src.messages":
@@ -45,21 +46,32 @@ def hex_dump_memory(level, info, data, num):
 
 
 class IterRegistry(type):
-    def __iter__(cls):
+    def __iter__(cls) -> Generator['Message', None, None]:
         for ref in cls._registry:
             obj = ref()
             if obj is not None:
                 yield obj
 
 
+class State(Enum):
+    '''state of the logical connection'''
+    init = 0
+    '''just created'''
+    received = 1
+    '''at least one packet received'''
+    up = 2
+    '''at least one cmd-rsp transaction'''
+    pend = 3
+    '''inverter transaction pending, don't send MODBUS cmds'''
+    closed = 4
+    '''connection closed'''
+
+
 class Message(metaclass=IterRegistry):
     _registry = []
-    STATE_INIT = 0
-    STATE_UP = 2
-    STATE_CLOSED = 3
 
     def __init__(self, server_side: bool, send_modbus_cb:
-                 Callable[[bytes, int, str], None], mb_timeout):
+                 Callable[[bytes, int, str], None], mb_timeout: int):
         self._registry.append(weakref.ref(self))
 
         self.server_side = server_side
@@ -78,7 +90,7 @@ class Message(metaclass=IterRegistry):
         self._send_buffer = bytearray(0)
         self._forward_buffer = bytearray(0)
         self.new_data = {}
-        self.state = self.STATE_INIT
+        self.state = State.init
 
     '''
     Empty methods, that have to be implemented in any child class which
@@ -97,7 +109,7 @@ class Message(metaclass=IterRegistry):
     '''
     def close(self) -> None:
         if self.mb:
-            del self.mb
+            self.mb.close()
             self.mb = None
         pass  # pragma: no cover
 
diff --git a/app/src/modbus.py b/app/src/modbus.py
index 8f3778b..7425b56 100644
--- a/app/src/modbus.py
+++ b/app/src/modbus.py
@@ -105,7 +105,17 @@ class Modbus():
         self.req_pend = False
         self.tim = None
 
+    def close(self):
+        """free the queue and erase the callback handlers"""
+        logging.debug('Modbus close:')
+        self.__stop_timer()
+        self.rsp_handler = None
+        self.snd_handler = None
+        while not self.que.empty:
+            self.que.get_nowait()
+
     def __del__(self):
+        """log statistics on the deleting of a MODBUS instance"""
         logging.debug(f'Modbus __del__:\n {self.counter}')
 
     def build_msg(self, addr: int, func: int, reg: int, val: int,
@@ -243,6 +253,7 @@ class Modbus():
         # logging.debug(f'Modbus stop timer {self}')
         if self.tim:
             self.tim.cancel()
+            self.tim = None
 
     def __timeout_cb(self) -> None:
         '''Rsponse timeout handler retransmit pdu or send next pdu'''
diff --git a/app/src/my_timer.py b/app/src/my_timer.py
new file mode 100644
index 0000000..46435bd
--- /dev/null
+++ b/app/src/my_timer.py
@@ -0,0 +1,35 @@
+import asyncio
+import logging
+from itertools import count
+
+
+class Timer:
+    def __init__(self, cb, id_str: str = ''):
+        self.__timeout_cb = cb
+        self.loop = asyncio.get_event_loop()
+        self.tim = None
+        self.id_str = id_str
+        self.exp_count = count(0)
+
+    def start(self, timeout: float) -> None:
+        '''Start timer with timeout seconds'''
+        if self.tim:
+            self.tim.cancel()
+        self.tim = self.loop.call_later(timeout, self.__timeout)
+        logging.debug(f'[{self.id_str}]Start timer')
+
+    def stop(self) -> None:
+        '''Stop timer'''
+        logging.debug(f'[{self.id_str}]Stop timer')
+        if self.tim:
+            self.tim.cancel()
+            self.tim = None
+
+    def __timeout(self) -> None:
+        '''timer expired handler'''
+        logging.debug(f'[{self.id_str}]Timer expired')
+        self.__timeout_cb(next(self.exp_count))
+
+    def close(self) -> None:
+        self.stop()
+        self.__timeout_cb = None
diff --git a/app/src/scheduler.py b/app/src/scheduler.py
index 6f54b6d..3c1d25a 100644
--- a/app/src/scheduler.py
+++ b/app/src/scheduler.py
@@ -3,8 +3,6 @@ import json
 from mqtt import Mqtt
 from aiocron import crontab
 from infos import ClrAtMidnight
-from modbus import Modbus
-from messages import Message
 
 logger_mqtt = logging.getLogger('mqtt')
 
@@ -21,9 +19,6 @@ class Schedule:
 
         crontab('0 0 * * *', func=cls.atmidnight, start=True)
 
-        # every minute
-        crontab('* * * * *', func=cls.regular_modbus_cmds, start=True)
-
     @classmethod
     async def atmidnight(cls) -> None:
         '''Clear daily counters at midnight'''
@@ -33,15 +28,3 @@ class Schedule:
             logger_mqtt.debug(f'{key}: {data}')
             data_json = json.dumps(data)
             await cls.mqtt.publish(f"{key}", data_json)
-
-    @classmethod
-    async def regular_modbus_cmds(cls):
-        for m in Message:
-            if m.server_side:
-                fnc = getattr(m, "send_modbus_cmd", None)
-                if callable(fnc):
-                    await fnc(Modbus.READ_REGS, 0x3008, 21, logging.DEBUG)
-                    # if 0 == (cls.count % 30):
-                    #     # logging.info("Regular Modbus Status request")
-                    #     await fnc(Modbus.READ_REGS, 0x2007, 2, logging.DEBUG)
-        cls.count += 1
diff --git a/app/src/server.py b/app/src/server.py
index 18dc401..d835e4b 100644
--- a/app/src/server.py
+++ b/app/src/server.py
@@ -2,6 +2,8 @@ import logging
 import asyncio
 import signal
 import os
+from asyncio import StreamReader, StreamWriter
+from aiohttp import web
 from logging import config  # noqa F401
 from messages import Message
 from inverter import Inverter
@@ -10,25 +12,83 @@ from gen3plus.inverter_g3p import InverterG3P
 from scheduler import Schedule
 from config import Config
 
+routes = web.RouteTableDef()
+proxy_is_up = False
 
-async def handle_client(reader, writer):
+
+@routes.get('/')
+async def hello(request):
+    return web.Response(text="Hello, world")
+
+
+@routes.get('/-/ready')
+async def ready(request):
+    if proxy_is_up:
+        status = 200
+        text = 'Is ready'
+    else:
+        status = 503
+        text = 'Not ready'
+    return web.Response(status=status, text=text)
+
+
+@routes.get('/-/healthy')
+async def healthy(request):
+
+    if proxy_is_up:
+        # logging.info('web reqeust healthy()')
+        for stream in Message:
+            try:
+                res = stream.healthy()
+                if not res:
+                    return web.Response(status=503, text="I have a problem")
+            except Exception as err:
+                logging.info(f'Exception:{err}')
+
+    return web.Response(status=200, text="I'm fine")
+
+
+async def webserver(addr, port):
+    '''coro running our webserver'''
+    app = web.Application()
+    app.add_routes(routes)
+    runner = web.AppRunner(app)
+
+    await runner.setup()
+    site = web.TCPSite(runner, addr, port)
+    await site.start()
+    logging.info(f'HTTP server listen on port: {port}')
+
+    try:
+        # Normal interaction with aiohttp
+        while True:
+            await asyncio.sleep(3600)  # sleep forever
+    except asyncio.CancelledError:
+        logging.info('HTTP server cancelled')
+        await runner.cleanup()
+        logging.debug('HTTP cleanup done')
+
+
+async def handle_client(reader: StreamReader, writer: StreamWriter):
     '''Handles a new incoming connection and starts an async loop'''
 
     addr = writer.get_extra_info('peername')
     await InverterG3(reader, writer, addr).server_loop(addr)
 
 
-async def handle_client_v2(reader, writer):
+async def handle_client_v2(reader: StreamReader, writer: StreamWriter):
     '''Handles a new incoming connection and starts an async loop'''
 
     addr = writer.get_extra_info('peername')
     await InverterG3P(reader, writer, addr).server_loop(addr)
 
 
-async def handle_shutdown(loop):
+async def handle_shutdown(web_task):
     '''Close all TCP connections and stop the event loop'''
 
     logging.info('Shutdown due to SIGTERM')
+    global proxy_is_up
+    proxy_is_up = False
 
     #
     # first, disc all open TCP connections gracefully
@@ -38,7 +98,7 @@ async def handle_shutdown(loop):
             await asyncio.wait_for(stream.disc(), 2)
         except Exception:
             pass
-    logging.info('Disconnecting done')
+    logging.info('Proxy disconnecting done')
 
     #
     # second, close all open TCP connections
@@ -46,12 +106,20 @@ async def handle_shutdown(loop):
     for stream in Message:
         stream.close()
 
-    #
-    # at last, we stop the loop
-    #
-    loop.stop()
+    await asyncio.sleep(0.1)  # give time for closing
+    logging.info('Proxy closing done')
 
-    logging.info('Shutdown complete')
+    #
+    # third, cancel the web server
+    #
+    web_task.cancel()
+    await web_task
+
+    #
+    # at last, start a coro for stopping the loop
+    #
+    logging.debug("Stop event loop")
+    loop.stop()
 
 
 def get_log_level() -> int:
@@ -84,17 +152,28 @@ if __name__ == "__main__":
     logging.getLogger('conn').setLevel(log_level)
     logging.getLogger('data').setLevel(log_level)
     logging.getLogger('tracer').setLevel(log_level)
+    logging.getLogger('asyncio').setLevel(log_level)
     # logging.getLogger('mqtt').setLevel(log_level)
 
-    # read config file
-    Config.class_init()
-
     loop = asyncio.new_event_loop()
     asyncio.set_event_loop(loop)
 
+    # read config file
+    ConfigErr = Config.class_init()
+    if ConfigErr is not None:
+        logging.info(f'ConfigErr: {ConfigErr}')
     Inverter.class_init()
     Schedule.start()
 
+    #
+    # Create tasks for our listening servers. These must be tasks! If we call
+    # start_server directly out of our main task, the eventloop will be blocked
+    # and we can't receive and handle the UNIX signals!
+    #
+    loop.create_task(asyncio.start_server(handle_client, '0.0.0.0', 5005))
+    loop.create_task(asyncio.start_server(handle_client_v2, '0.0.0.0', 10000))
+    web_task = loop.create_task(webserver('0.0.0.0', 8127))
+
     #
     # Register some UNIX Signal handler for a gracefully server shutdown
     # on Docker restart and stop
@@ -102,22 +181,18 @@ if __name__ == "__main__":
     for signame in ('SIGINT', 'SIGTERM'):
         loop.add_signal_handler(getattr(signal, signame),
                                 lambda loop=loop: asyncio.create_task(
-                                    handle_shutdown(loop)))
-
-    #
-    # Create taska for our listening servera. These must be tasks! If we call
-    # start_server directly out of our main task, the eventloop will be blocked
-    # and we can't receive and handle the UNIX signals!
-    #
-    loop.create_task(asyncio.start_server(handle_client, '0.0.0.0', 5005))
-    loop.create_task(asyncio.start_server(handle_client_v2, '0.0.0.0', 10000))
+                                    handle_shutdown(web_task)))
 
+    loop.set_debug(log_level == logging.DEBUG)
     try:
+        if ConfigErr is None:
+            proxy_is_up = True
         loop.run_forever()
     except KeyboardInterrupt:
         pass
     finally:
+        logging.info("Event loop is stopped")
         Inverter.class_close(loop)
-        logging.info('Close event loop')
+        logging.debug('Close event loop')
         loop.close()
         logging.info(f'Finally, exit Server "{serv_name}"')
diff --git a/app/tests/test_infos_g3.py b/app/tests/test_infos_g3.py
index 193536e..d335db8 100644
--- a/app/tests/test_infos_g3.py
+++ b/app/tests/test_infos_g3.py
@@ -140,6 +140,82 @@ def InvDataSeq2(): # Data indication from the controller
     msg +=  b'\x53\x00\x00'  
     return msg
 
+@pytest.fixture
+def InvDataNew(): # Data indication from DSP V5.0.17
+    msg  = b'\x00\x00\x00\xa3\x00\x00\x00\x00\x53\x00\x00'
+    msg += b'\x00\x00\x00\x80\x53\x00\x00\x00\x00\x01\x04\x53\x00\x00\x00\x00'
+    msg += b'\x01\x90\x41\x00\x00\x01\x91\x53\x00\x00\x00\x00\x01\x90\x53\x00'
+    msg += b'\x00\x00\x00\x01\x91\x53\x00\x00\x00\x00\x01\x90\x53\x00\x00\x00'
+    msg += b'\x00\x01\x91\x53\x00\x00\x00\x00\x01\x94\x53\x00\x00\x00\x00\x01'
+    msg += b'\x95\x53\x00\x00\x00\x00\x01\x98\x53\x00\x00\x00\x00\x01\x99\x53'
+    msg += b'\x00\x00\x00\x00\x01\x80\x53\x00\x00\x00\x00\x01\x90\x41\x00\x00'
+    msg += b'\x01\x94\x53\x00\x00\x00\x00\x01\x94\x53\x00\x00\x00\x00\x01\x96'
+    msg += b'\x53\x00\x00\x00\x00\x01\x98\x53\x00\x00\x00\x00\x01\xa0\x53\x00'
+    msg += b'\x00\x00\x00\x01\xf0\x41\x00\x00\x01\xf1\x53\x00\x00\x00\x00\x01'
+    msg += b'\xf4\x53\x00\x00\x00\x00\x01\xf5\x53\x00\x00\x00\x00\x01\xf8\x53'
+    msg += b'\x00\x00\x00\x00\x01\xf9\x53\x00\x00\x00\x00\x00\x00\x53\x00\x00'
+    msg += b'\x00\x00\x00\x01\x53\x00\x00\x00\x00\x00\x00\x53\x00\x00\x00\x00'
+    msg += b'\x00\x01\x53\x00\x00\x00\x00\x00\x04\x53\x00\x00\x00\x00\x00\x58'
+    msg += b'\x41\x00\x00\x02\x00\x53\x00\x00\x00\x00\x02\x00\x53\x00\x00\x00'
+    msg += b'\x00\x02\x02\x53\x00\x00\x00\x00\x02\x00\x53\x00\x00\x00\x00\x02'
+    msg += b'\x04\x53\x00\x00\x00\x00\x02\x58\x41\x00\x00\x02\x59\x53\x00\x00'
+    msg += b'\x00\x00\x02\x40\x53\x00\x00\x00\x00\x02\x41\x53\x00\x00\x00\x00'
+    msg += b'\x02\x40\x53\x00\x00\x00\x00\x02\x41\x53\x00\x00\x00\x00\x02\x44'
+    msg += b'\x53\x00\x00\x00\x00\x02\x45\x53\x00\x00\x00\x00\x02\x60\x53\x00'
+    msg += b'\x00\x00\x00\x02\x61\x53\x00\x00\x00\x00\x02\x60\x53\x00\x00\x00'
+    msg += b'\x00\x02\x20\x41\x00\x00\x02\x24\x53\x00\x00\x00\x00\x02\x24\x53'
+    msg += b'\x00\x00\x00\x00\x02\x26\x53\x00\x00\x00\x00\x02\x40\x53\x00\x00'
+    msg += b'\x00\x00\x02\x40\x53\x00\x00\x00\x00\x02\x80\x41\x00\x00\x02\x81'
+    msg += b'\x53\x00\x00\x00\x00\x02\x84\x53\x00\x00\x00\x00\x02\x85\x53\x00'
+    msg += b'\x00\x00\x00\x02\xc0\x53\x00\x00\x00\x00\x02\xc1\x53\x00\x00\x00'
+    msg += b'\x00\x02\xc0\x53\x00\x00\x00\x00\x02\xc1\x53\x00\x00\x00\x00\x02'
+    msg += b'\xc0\x53\x00\x00\x00\x00\x02\xc1\x53\x00\x00\x00\x00\x02\xc4\x53'
+    msg += b'\x00\x00\x00\x00\x02\x00\x53\x00\x00\x00\x00\x02\x80\x53\x00\x00'
+    msg += b'\x00\x00\x02\xc8\x42\x00\x00\x00\x00\x48\x42\x00\x00\x00\x00\x80'
+    msg += b'\x42\x00\x00\x00\x00\x04\x53\x00\x00\x00\x00\x01\x20\x53\x00\x00'
+    msg += b'\x00\x00\x01\x84\x53\x00\x10\x00\x00\x02\x40\x46\x00\x00\x00\x00'
+    msg += b'\x00\x00\x04\x04\x46\x02\x00\x46\x02\x00\x00\x04\x00\x46\x00\x00'
+    msg += b'\x00\x00\x00\x00\x05\x04\x42\x00\x00\x00\x05\x50\x42\x00\x00\x00'
+    msg += b'\x00\x14\x42\x00\x00\x00\x00\x00\x46\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\xa4\x46\x00\x00\x00\x00\x00\x00\x01\x00\x46\x00\x00\x00\x00\x00'
+    msg += b'\x00\x01\x44\x46\x00\x00\x00\x00\x00\x00\x02\x00\x46\x00\x00\x00'
+    msg += b'\x00\x00\x00\x08\x04\x46\x00\x00\x00\x00\x00\x00\x08\x90\x46\x00'
+    msg += b'\x00\x00\x00\x00\x00\x08\x54\x46\x00\x00\x00\x00\x00\x00\x09\x20'
+    msg += b'\x46\x00\x00\x00\x00\x00\x00\x08\x04\x46\x00\x00\x00\x00\x00\x00'
+    msg += b'\x08\x00\x46\x00\x00\x00\x00\x00\x00\x08\x84\x46\x00\x00\x00\x00'
+    msg += b'\x00\x00\x08\x40\x46\x00\x00\x00\x00\x00\x00\x09\x04\x46\x00\x00'
+    msg += b'\x00\x00\x00\x00\x0a\x10\x46\x00\x00\x00\x00\x00\x00\x0c\x14\x46'
+    msg += b'\x00\x00\x00\x00\x00\x00\x0c\x80\x46\x00\x00\x00\x00\x00\x00\x0c'
+    msg += b'\x24\x42\x00\x00\x00\x0d\x00\x42\x00\x00\x00\x00\x04\x42\x00\x00'
+    msg += b'\x00\x00\x00\x42\x00\x00\x00\x00\x44\x42\x00\x00\x00\x00\x10\x42'
+    msg += b'\x00\x00\x00\x01\x14\x53\x00\x00\x00\x00\x01\xa0\x53\x00\x00\x00'
+    msg += b'\x00\x10\x04\x53\x55\xaa\x00\x00\x10\x40\x53\x00\x00\x00\x00\x10'
+    msg += b'\x04\x53\x00\x00\x00\x00\x11\x00\x53\x00\x00\x00\x00\x11\x84\x53'
+    msg += b'\x00\x00\x00\x00\x10\x50\x53\xff\xff\x00\x00\x10\x14\x53\x03\x20'
+    msg += b'\x00\x00\x10\x00\x53\x00\x00\x00\x00\x11\x24\x53\x00\x00\x00\x00'
+    msg += b'\x03\x00\x53\x00\x00\x00\x00\x03\x64\x53\x00\x00\x00\x00\x04\x50'
+    msg += b'\x53\x00\x00\x00\x00\x00\x34\x53\x00\x00\x00\x00\x00\x00\x42\x02'
+    msg += b'\x00\x00\x01\x04\x42\x00\x00\x00\x21\x00\x42\x00\x00\x00\x21\x44'
+    msg += b'\x42\x00\x00\x00\x22\x10\x53\x00\x00\x00\x00\x28\x14\x42\x01\x00'
+    msg += b'\x00\x28\xa0\x46\x42\x48\x00\x00\x00\x00\x29\x04\x42\x00\x00\x00'
+    msg += b'\x29\x40\x42\x00\x00\x00\x28\x04\x46\x42\x10\x00\x00\x00\x00\x28'
+    msg += b'\x00\x42\x00\x00\x00\x28\x84\x42\x00\x00\x00\x28\x50\x42\x00\x00'
+    msg += b'\x00\x29\x14\x42\x00\x00\x00\x2a\x00\x42\x00\x00\x00\x2c\x24\x46'
+    msg += b'\x42\x10\x00\x00\x00\x00\x2c\x80\x42\x00\x00\x00\x2c\x44\x53\x00'
+    msg += b'\x02\x00\x00\x2d\x00\x42\x00\x00\x00\x20\x04\x46\x42\x4d\x00\x00'
+    msg += b'\x00\x00\x20\x10\x42\x00\x00\x00\x20\x54\x42\x00\x00\x00\x20\x20'
+    msg += b'\x42\x00\x00\x00\x21\x04\x53\x00\x01\x00\x00\x22\x00\x42\x00\x00'
+    msg += b'\x00\x30\x04\x42\x00\x00\x00\x30\x40\x53\x00\x00\x00\x00\x30\x04'
+    msg += b'\x53\x00\x00\x00\x00\x31\x10\x42\x00\x00\x00\x31\x94\x53\x00\x04'
+    msg += b'\x00\x00\x30\x00\x53\x00\x00\x00\x00\x30\x24\x53\x00\x00\x00\x00'
+    msg += b'\x30\x00\x53\x00\x00\x00\x00\x31\x04\x53\x00\x00\x00\x00\x31\x80'
+    msg += b'\x53\x00\x00\x00\x00\x32\x44\x53\x00\x00\x00\x00\x30\x00\x53\x00'
+    msg += b'\x00\x00\x00\x30\x80\x53\x00\x00\x00\x00\x30\x00\x53\x00\x00\x00'
+    msg += b'\x00\x30\x80\x53\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x03\x00'
+    msg += b'\x00\x00\x00\x00'
+    return msg
+
 @pytest.fixture
 def InvDataSeq2_Zero(): # Data indication from the controller
     msg =   b'\x00\x00\x00\xa3\x00\x00\x00\x64\x53\x00\x01\x00\x00\x00\xc8\x53\x00\x02\x00\x00\x01\x2c\x53\x00\x00\x00\x00\x01\x90\x49\x00\x00\x00\x00\x00\x00\x01\x91\x53\x00\x00'
@@ -391,6 +467,25 @@ def test_must_incr_total2(InvDataSeq2, InvDataSeq2_Zero):
     assert json.dumps(i.db['total']) == json.dumps({'Daily_Generation': 1.7, 'Total_Generation': 17.36})
     assert json.dumps(i.db['input']) == json.dumps({"pv1": {"Voltage": 33.6, "Current": 1.91, "Power": 64.5, "Daily_Generation": 1.08, "Total_Generation": 9.74}, "pv2": {"Voltage": 33.5, "Current": 1.36, "Power": 45.7, "Daily_Generation": 0.62, "Total_Generation": 7.62}, "pv3": {"Voltage": 0.0, "Current": 0.0, "Power": 0.0}, "pv4": {"Voltage": 0.0, "Current": 0.0, "Power": 0.0}})
    
+def test_new_data_types(InvDataNew):
+    i = InfosG3()
+    tests = 0
+    for key, update in i.parse (InvDataNew):
+        if key == 'events':
+            tests +=1
+        elif key == 'inverter':
+            assert update == True
+            tests +=1
+        elif key == 'input':
+            assert update == False
+            tests +=1
+        else:
+            assert False
+
+    assert tests==15
+    assert json.dumps(i.db['inverter']) == json.dumps({"Manufacturer": 0})
+    assert json.dumps(i.db['input']) == json.dumps({"pv1": {}})
+    assert json.dumps(i.db['events']) == json.dumps({"401_": 0, "404_": 0, "405_": 0, "408_": 0, "409_No_Utility": 0, "406_": 0, "416_": 0})
 
 def test_invalid_data_type(InvalidDataSeq):
     i = InfosG3()
diff --git a/app/tests/test_modbus.py b/app/tests/test_modbus.py
index b44cb12..0009182 100644
--- a/app/tests/test_modbus.py
+++ b/app/tests/test_modbus.py
@@ -5,9 +5,9 @@ from app.src.modbus import Modbus
 from app.src.infos import Infos, Register
 
 pytest_plugins = ('pytest_asyncio',)
-pytestmark = pytest.mark.asyncio(scope="module")
+# pytestmark = pytest.mark.asyncio(scope="module")
 
-class TestHelper(Modbus):
+class ModbusTestHelper(Modbus):
     def __init__(self):
         super().__init__(self.send_cb)
         self.db = Infos()
@@ -35,7 +35,7 @@ def test_modbus_crc():
     
 def test_build_modbus_pdu():
     '''Check building and sending a MODBUS RTU'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.build_msg(1,6,0x2000,0x12)
     assert mb.pdu == b'\x01\x06\x20\x00\x00\x12\x02\x07'
     assert mb._Modbus__check_crc(mb.pdu)
@@ -47,7 +47,7 @@ def test_build_modbus_pdu():
 
 def test_recv_req():
     '''Receive a valid request, which must transmitted'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     assert mb.recv_req(b'\x01\x06\x20\x00\x00\x12\x02\x07')
     assert mb.last_fcode == 6
     assert mb.last_reg == 0x2000
@@ -56,7 +56,7 @@ def test_recv_req():
 
 def test_recv_req_crc_err():
     '''Receive a request with invalid CRC, which must be dropped'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     assert not mb.recv_req(b'\x01\x06\x20\x00\x00\x12\x02\x08')
     assert mb.pdu == None
     assert mb.last_fcode == 0   
@@ -66,7 +66,7 @@ def test_recv_req_crc_err():
 
 def test_recv_resp_crc_err():
     '''Receive a response with invalid CRC, which must be dropped'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     # simulate a transmitted request
     mb.req_pend = True
     mb.last_addr = 1
@@ -86,7 +86,7 @@ def test_recv_resp_crc_err():
 
 def test_recv_resp_invalid_addr():
     '''Receive a response with wrong server addr, which must be dropped'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.req_pend = True
     # simulate a transmitted request
     mb.last_addr = 1
@@ -109,7 +109,7 @@ def test_recv_resp_invalid_addr():
 
 def test_recv_recv_fcode():
     '''Receive a response with wrong function code, which must be dropped'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.build_msg(1,4,0x300e,2)
     assert mb.que.qsize() == 0
     assert mb.req_pend
@@ -130,7 +130,7 @@ def test_recv_recv_fcode():
 
 def test_recv_resp_len():
     '''Receive a response with wrong data length, which must be dropped'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.build_msg(1,3,0x300e,3)
     assert mb.que.qsize() == 0
     assert mb.req_pend
@@ -152,7 +152,7 @@ def test_recv_resp_len():
 
 def test_recv_unexpect_resp():
     '''Receive a response when we havb't sent a request'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     assert not mb.req_pend
    
     # check unexpected response, which must be dropped
@@ -167,7 +167,7 @@ def test_recv_unexpect_resp():
 
 def test_parse_resp():
     '''Receive matching response and parse the values'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.build_msg(1,3,0x3007,6)
     assert mb.que.qsize() == 0
     assert mb.req_pend
@@ -191,7 +191,7 @@ def test_parse_resp():
     assert not mb.req_pend
 
 def test_queue():
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.build_msg(1,3,0x3022,4)
     assert mb.que.qsize() == 0
     assert mb.req_pend
@@ -210,7 +210,7 @@ def test_queue():
 
 def test_queue2():
     '''Check queue handling for build_msg() calls'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.build_msg(1,3,0x3007,6)
     mb.build_msg(1,6,0x2008,4)
     assert mb.que.qsize() == 1
@@ -258,7 +258,7 @@ def test_queue2():
 
 def test_queue3():
     '''Check queue handling for recv_req() calls'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     assert mb.recv_req(b'\x01\x03\x30\x07\x00\x06{\t', mb.resp_handler)
     assert mb.recv_req(b'\x01\x06\x20\x08\x00\x04\x02\x0b', mb.resp_handler)
     assert mb.que.qsize() == 1
@@ -315,7 +315,7 @@ def test_queue3():
 async def test_timeout():
     '''Test MODBUS response timeout and RTU retransmitting'''
     assert asyncio.get_running_loop()
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     mb.max_retries = 2
     mb.timeout = 0.1  # 100ms timeout for fast testing, expect a time resolution of at least 10ms
     assert asyncio.get_running_loop() == mb.loop
@@ -363,7 +363,7 @@ async def test_timeout():
 
 def test_recv_unknown_data():
     '''Receive a response with an unknwon register'''
-    mb = TestHelper()
+    mb = ModbusTestHelper()
     assert 0x9000 not in mb.map
     mb.map[0x9000] = {'reg': Register.TEST_REG1,   'fmt': '!H', 'ratio':  1}
 
diff --git a/app/tests/test_solarman.py b/app/tests/test_solarman.py
index fca2b41..54e4878 100644
--- a/app/tests/test_solarman.py
+++ b/app/tests/test_solarman.py
@@ -7,6 +7,7 @@ from app.src.gen3plus.solarman_v5 import SolarmanV5
 from app.src.config import Config
 from app.src.infos import Infos, Register
 from app.src.modbus import Modbus
+from app.src.messages import State
 
 
 pytest_plugins = ('pytest_asyncio',)
@@ -24,12 +25,24 @@ class Writer():
     def write(self, pdu: bytearray):
         self.sent_pdu = pdu
 
+
+class Mqtt():
+    def __init__(self):
+        self.key = ''
+        self.data = ''
+
+    async def publish(self, key, data):
+        self.key = key
+        self.data = data
+
+
 class MemoryStream(SolarmanV5):
     def __init__(self, msg, chunks = (0,), server_side: bool = True):
         super().__init__(server_side)
         if server_side:
             self.mb.timeout = 1   # overwrite for faster testing
         self.writer = Writer()
+        self.mqtt = Mqtt()
         self.__msg = msg
         self.__msg_len = len(msg)
         self.__chunks = chunks
@@ -43,6 +56,8 @@ class MemoryStream(SolarmanV5):
         self.test_exception_async_write = False
         self.entity_prfx = ''
         self.at_acl = {'mqtt': {'allow': ['AT+'], 'block': ['AT+WEBU']}, 'tsun': {'allow': ['AT+Z', 'AT+UPURL', 'AT+SUPDATE', 'AT+TIME'], 'block': ['AT+WEBU']}}
+        self.key = ''
+        self.data = ''
 
     def _timestamp(self):
         return timestamp
@@ -54,6 +69,10 @@ class MemoryStream(SolarmanV5):
         self.__msg += msg
         self.__msg_len += len(msg)    
 
+    def publish_mqtt(self, key, data):
+        self.key = key
+        self.data = data
+
     def _read(self) -> int:
         copied_bytes = 0
         try:    
@@ -481,9 +500,10 @@ def AtCommandIndMsgBlock():  # 0x4510
 
 @pytest.fixture
 def AtCommandRspMsg():  # 0x1510
-    msg  = b'\xa5\x0a\x00\x10\x15\x03\x03' +get_sn()  +b'\x01\x01'
+    msg  = b'\xa5\x11\x00\x10\x15\x03\x03' +get_sn()  +b'\x01\x01'
     msg += total()  
     msg += hb()
+    msg += b'\x00\x00\x00\x00+ok'
     msg += correct_checksum(msg)
     msg += b'\x15'
     return msg
@@ -832,8 +852,7 @@ def test_read_message_in_chunks2(ConfigTsunInv1, DeviceIndMsg):
     assert m.data_len == 0xd4
     assert m.msg_count == 1
     assert m.db.stat['proxy']['Invalid_Msg_Format'] == 0
-    while m.read(): # read rest of message
-        pass
+    m.read()        # read rest of message
     assert m.msg_count == 1
     assert not m.header_valid  # must be invalid, since msg was handled and buffer flushed
     assert m.db.stat['proxy']['Invalid_Msg_Format'] == 0
@@ -1255,48 +1274,64 @@ async def test_msg_build_modbus_req(ConfigTsunInv1, DeviceIndMsg, DeviceRspMsg,
     m.close()
 
 @pytest.mark.asyncio
-async def test_AT_cmd(ConfigTsunAllowAll, DeviceIndMsg, DeviceRspMsg, InverterIndMsg, InverterRspMsg, AtCommandIndMsg):
+async def test_AT_cmd(ConfigTsunAllowAll, DeviceIndMsg, DeviceRspMsg, InverterIndMsg, InverterRspMsg, AtCommandIndMsg, AtCommandRspMsg):
     ConfigTsunAllowAll
     m = MemoryStream(DeviceIndMsg, (0,), True)
     m.append_msg(InverterIndMsg)
-    m.read()
+    m.append_msg(AtCommandRspMsg)
+    m.read()   # read device ind
     assert m.control == 0x4110
     assert str(m.seq) == '01:01'
-    assert m._recv_buffer==InverterIndMsg   # unhandled next message
+    assert m._recv_buffer==InverterIndMsg + AtCommandRspMsg  # unhandled next message
     assert m._send_buffer==DeviceRspMsg
     assert m._forward_buffer==DeviceIndMsg
 
     m._send_buffer = bytearray(0) # clear send buffer for next test    
     m._forward_buffer = bytearray(0) # clear send buffer for next test    
     await m.send_at_cmd('AT+TIME=214028,1,60,120')
-    assert m._recv_buffer==InverterIndMsg   # unhandled next message
+    assert m._recv_buffer==InverterIndMsg + AtCommandRspMsg     # unhandled next message
     assert m._send_buffer==b''
     assert m._forward_buffer==b''
     assert str(m.seq) == '01:01'
+    assert m.mqtt.key == ''
+    assert m.mqtt.data == ""
 
-    m.read()
+    m.read() # read inverter ind
     assert m.control == 0x4210
     assert str(m.seq) == '02:02'
-    assert m._recv_buffer==b''
+    assert m._recv_buffer==AtCommandRspMsg   # unhandled next message
     assert m._send_buffer==InverterRspMsg
     assert m._forward_buffer==InverterIndMsg
     
     m._send_buffer = bytearray(0) # clear send buffer for next test    
     m._forward_buffer = bytearray(0) # clear send buffer for next test    
     await m.send_at_cmd('AT+TIME=214028,1,60,120')
-    assert m._recv_buffer==b''
+    assert m._recv_buffer==AtCommandRspMsg   # unhandled next message
     assert m._send_buffer==AtCommandIndMsg
     assert m._forward_buffer==b''
     assert str(m.seq) == '02:03'
+    assert m.mqtt.key == ''
+    assert m.mqtt.data == ""
 
     m._send_buffer = bytearray(0) # clear send buffer for next test    
+    m.read() # read at resp
+    assert m.control == 0x1510
+    assert str(m.seq) == '03:03'
+    assert m._recv_buffer==b''
+    assert m._send_buffer==b''
+    assert m._forward_buffer==b''
+    assert m.key == 'at_resp'
+    assert m.data == "+ok"
+
     m.test_exception_async_write = True
     await m.send_at_cmd('AT+TIME=214028,1,60,120')
     assert m._recv_buffer==b''
     assert m._send_buffer==b''
     assert m._forward_buffer==b''
-    assert str(m.seq) == '02:04'
+    assert str(m.seq) == '03:04'
     assert m.forward_at_cmd_resp == False
+    assert m.mqtt.key == ''
+    assert m.mqtt.data == ""
     m.close()
 
 @pytest.mark.asyncio
@@ -1318,6 +1353,8 @@ async def test_AT_cmd_blocked(ConfigTsunAllowAll, DeviceIndMsg, DeviceRspMsg, In
     assert m._send_buffer==b''
     assert m._forward_buffer==b''
     assert str(m.seq) == '01:01'
+    assert m.mqtt.key == ''
+    assert m.mqtt.data == ""
 
     m.read()
     assert m.control == 0x4210
@@ -1334,6 +1371,8 @@ async def test_AT_cmd_blocked(ConfigTsunAllowAll, DeviceIndMsg, DeviceRspMsg, In
     assert m._forward_buffer==b''
     assert str(m.seq) == '02:02'
     assert m.forward_at_cmd_resp == False
+    assert m.mqtt.key == 'at_resp'
+    assert m.mqtt.data == "'AT+WEBU' is forbidden"
     m.close()
 
 def test_AT_cmd_ind(ConfigTsunInv1, AtCommandIndMsg):
@@ -1398,7 +1437,7 @@ def test_msg_at_command_rsp1(ConfigTsunInv1, AtCommandRspMsg):
     assert m.control == 0x1510
     assert str(m.seq) == '03:03'
     assert m.header_len==11
-    assert m.data_len==10
+    assert m.data_len==17
     assert m._forward_buffer==AtCommandRspMsg
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
@@ -1417,7 +1456,7 @@ def test_msg_at_command_rsp2(ConfigTsunInv1, AtCommandRspMsg):
     assert m.control == 0x1510
     assert str(m.seq) == '03:03'
     assert m.header_len==11
-    assert m.data_len==10
+    assert m.data_len==17
     assert m._forward_buffer==b''
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
@@ -1428,7 +1467,7 @@ def test_msg_modbus_req(ConfigTsunInv1, MsgModbusCmd, MsgModbusCmdFwd):
     ConfigTsunInv1
     m = MemoryStream(b'')
     m.snr = get_sn_int()
-    m.state = m.STATE_UP
+    m.state = State.up
     c = m.createClientStream(MsgModbusCmd)
 
     m.db.stat['proxy']['Unknown_Ctrl'] = 0
@@ -1455,7 +1494,7 @@ def test_msg_modbus_req2(ConfigTsunInv1, MsgModbusCmdCrcErr):
     ConfigTsunInv1
     m = MemoryStream(b'')
     m.snr = get_sn_int()
-    m.state = m.STATE_UP
+    m.state = State.up
     c = m.createClientStream(MsgModbusCmdCrcErr)
 
     m.db.stat['proxy']['Unknown_Ctrl'] = 0
@@ -1661,21 +1700,21 @@ def test_zombie_conn(ConfigTsunInv1, MsgInverterInd):
     m1 = MemoryStream(MsgInverterInd, (0,))
     m2 = MemoryStream(MsgInverterInd, (0,))
     m3 = MemoryStream(MsgInverterInd, (0,))
-    assert m1.state == m1.STATE_INIT
-    assert m2.state == m2.STATE_INIT
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.init
+    assert m2.state == m2.State.init
+    assert m3.state == m3.State.init
     m1.read()         # read complete msg, and set unique_id
-    assert m1.state == m1.STATE_INIT
-    assert m2.state == m2.STATE_INIT
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.init
+    assert m2.state == m2.State.init
+    assert m3.state == m3.State.init
     m2.read()         # read complete msg, and set unique_id
-    assert m1.state == m1.STATE_CLOSED
-    assert m2.state == m2.STATE_INIT
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.closed
+    assert m2.state == m2.State.init
+    assert m3.state == m3.State.init
     m3.read()         # read complete msg, and set unique_id
-    assert m1.state == m1.STATE_CLOSED
-    assert m2.state == m2.STATE_CLOSED
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.closed
+    assert m2.state == m2.State.closed
+    assert m3.state == m3.State.init
     m1.close()
     m2.close()
     m3.close()
diff --git a/app/tests/test_talent.py b/app/tests/test_talent.py
index 102979c..f8efca0 100644
--- a/app/tests/test_talent.py
+++ b/app/tests/test_talent.py
@@ -4,6 +4,7 @@ from app.src.gen3.talent import Talent, Control
 from app.src.config import Config
 from app.src.infos import Infos, Register
 from app.src.modbus import Modbus
+from app.src.messages import State
 
  
 pytest_plugins = ('pytest_asyncio',)
@@ -60,7 +61,8 @@ class MemoryStream(Talent):
         return copied_bytes
     
     def _timestamp(self):
-        return 1700260990000
+        # return 1700260990000
+        return 1691246944000
     
     def createClientStream(self, msg, chunks = (0,)):
         c = MemoryStream(msg, chunks, False)
@@ -113,6 +115,10 @@ def MsgGetTime(): # Get Time Request message
 def MsgTimeResp(): # Get Time Resonse message
     return b'\x00\x00\x00\x1b\x10R170000000000001\x91\x22\x00\x00\x01\x89\xc6\x63\x4d\x80'
 
+@pytest.fixture
+def MsgTimeRespInv(): # Get Time Resonse message
+    return b'\x00\x00\x00\x17\x10R170000000000001\x91\x22\x00\x00\x01\x89'
+
 @pytest.fixture
 def MsgTimeInvalid(): # Get Time Request message
     return b'\x00\x00\x00\x13\x10R170000000000001\x94\x22'           
@@ -129,6 +135,18 @@ def MsgControllerInd(): # Data indication from the controller
     msg +=  b'\x49\x00\x00\x00\x02\x00\x0d\x04\x08\x49\x00\x00\x00\x00\x00\x07\xa1\x84\x49\x00\x00\x00\x01\x00\x0c\x50\x59\x49\x00\x00\x00\x4c\x00\x0d\x1f\x60\x49\x00\x00\x00\x00'
     return msg
 
+@pytest.fixture
+def MsgControllerIndTsOffs(): # Data indication from the controller - offset 0x1000
+    msg  =  b'\x00\x00\x01\x2f\x10R170000000000001\x91\x71\x0e\x10\x00\x00\x10R170000000000001'
+    msg +=  b'\x01\x00\x00\x01\x89\xc6\x63\x45\x50'
+    msg +=  b'\x00\x00\x00\x15\x00\x09\x2b\xa8\x54\x10\x52\x53\x57\x5f\x34\x30\x30\x5f\x56\x31\x2e\x30\x30\x2e\x30\x36\x00\x09\x27\xc0\x54\x06\x52\x61\x79\x6d\x6f'
+    msg +=  b'\x6e\x00\x09\x2f\x90\x54\x0b\x52\x53\x57\x2d\x31\x2d\x31\x30\x30\x30\x31\x00\x09\x5a\x88\x54\x0f\x74\x2e\x72\x61\x79\x6d\x6f\x6e\x69\x6f\x74\x2e\x63\x6f\x6d\x00\x09\x5a\xec\x54'
+    msg +=  b'\x1c\x6c\x6f\x67\x67\x65\x72\x2e\x74\x61\x6c\x65\x6e\x74\x2d\x6d\x6f\x6e\x69\x74\x6f\x72\x69\x6e\x67\x2e\x63\x6f\x6d\x00\x0d\x00\x20\x49\x00\x00\x00\x01\x00\x0c\x35\x00\x49\x00'
+    msg +=  b'\x00\x00\x64\x00\x0c\x96\xa8\x49\x00\x00\x00\x1d\x00\x0c\x7f\x38\x49\x00\x00\x00\x01\x00\x0c\xfc\x38\x49\x00\x00\x00\x01\x00\x0c\xf8\x50\x49\x00\x00\x01\x2c\x00\x0c\x63\xe0\x49'
+    msg +=  b'\x00\x00\x00\x00\x00\x0c\x67\xc8\x49\x00\x00\x00\x00\x00\x0c\x50\x58\x49\x00\x00\x00\x01\x00\x09\x5e\x70\x49\x00\x00\x13\x8d\x00\x09\x5e\xd4\x49\x00\x00\x13\x8d\x00\x09\x5b\x50'
+    msg +=  b'\x49\x00\x00\x00\x02\x00\x0d\x04\x08\x49\x00\x00\x00\x00\x00\x07\xa1\x84\x49\x00\x00\x00\x01\x00\x0c\x50\x59\x49\x00\x00\x00\x4c\x00\x0d\x1f\x60\x49\x00\x00\x00\x00'
+    return msg
+
 @pytest.fixture
 def MsgControllerAck(): # Get Time Request message
     return b'\x00\x00\x00\x14\x10R170000000000001\x99\x71\x01'
@@ -145,6 +163,92 @@ def MsgInverterInd(): # Data indication from the controller
     msg +=  b'\x54\x10T170000000000001\x00\x00\x00\x32\x54\x0a\x54\x53\x4f\x4c\x2d\x4d\x53\x36\x30\x30\x00\x00\x00\x3c\x54\x05\x41\x2c\x42\x2c\x43'
     return msg
 
+@pytest.fixture
+def MsgInverterIndTsOffs(): # Data indication from the controller + offset 256
+    msg  =  b'\x00\x00\x00\x8b\x10R170000000000001\x91\x04\x01\x90\x00\x01\x10R170000000000001'
+    msg +=  b'\x01\x00\x00\x01\x89\xc6\x63\x62\x08'
+    msg +=  b'\x00\x00\x00\x06\x00\x00\x00\x0a\x54\x08\x4d\x69\x63\x72\x6f\x69\x6e\x76\x00\x00\x00\x14\x54\x04\x54\x53\x55\x4e\x00\x00\x00\x1E\x54\x07\x56\x35\x2e\x30\x2e\x31\x31\x00\x00\x00\x28'
+    msg +=  b'\x54\x10T170000000000001\x00\x00\x00\x32\x54\x0a\x54\x53\x4f\x4c\x2d\x4d\x53\x36\x30\x30\x00\x00\x00\x3c\x54\x05\x41\x2c\x42\x2c\x43'
+    return msg
+
+@pytest.fixture
+def MsgInverterIndNew(): # Data indication from DSP V5.0.17
+    msg =  b'\x00\x00\x04\xa0\x10R170000000000001\x91\x04\x01\x90\x00\x01\x10R170000000000001'
+    msg += b'\x01\x00\x00\x01'
+    msg += b'\x90\x31\x4d\x68\x78\x00\x00\x00\xa3\x00\x00\x00\x00\x53\x00\x00'
+    msg += b'\x00\x00\x00\x80\x53\x00\x00\x00\x00\x01\x04\x53\x00\x00\x00\x00'
+    msg += b'\x01\x90\x41\x00\x00\x01\x91\x53\x00\x00\x00\x00\x01\x90\x53\x00'
+    msg += b'\x00\x00\x00\x01\x91\x53\x00\x00\x00\x00\x01\x90\x53\x00\x00\x00'
+    msg += b'\x00\x01\x91\x53\x00\x00\x00\x00\x01\x94\x53\x00\x00\x00\x00\x01'
+    msg += b'\x95\x53\x00\x00\x00\x00\x01\x98\x53\x00\x00\x00\x00\x01\x99\x53'
+    msg += b'\x00\x00\x00\x00\x01\x80\x53\x00\x00\x00\x00\x01\x90\x41\x00\x00'
+    msg += b'\x01\x94\x53\x00\x00\x00\x00\x01\x94\x53\x00\x00\x00\x00\x01\x96'
+    msg += b'\x53\x00\x00\x00\x00\x01\x98\x53\x00\x00\x00\x00\x01\xa0\x53\x00'
+    msg += b'\x00\x00\x00\x01\xf0\x41\x00\x00\x01\xf1\x53\x00\x00\x00\x00\x01'
+    msg += b'\xf4\x53\x00\x00\x00\x00\x01\xf5\x53\x00\x00\x00\x00\x01\xf8\x53'
+    msg += b'\x00\x00\x00\x00\x01\xf9\x53\x00\x00\x00\x00\x00\x00\x53\x00\x00'
+    msg += b'\x00\x00\x00\x01\x53\x00\x00\x00\x00\x00\x00\x53\x00\x00\x00\x00'
+    msg += b'\x00\x01\x53\x00\x00\x00\x00\x00\x04\x53\x00\x00\x00\x00\x00\x58'
+    msg += b'\x41\x00\x00\x02\x00\x53\x00\x00\x00\x00\x02\x00\x53\x00\x00\x00'
+    msg += b'\x00\x02\x02\x53\x00\x00\x00\x00\x02\x00\x53\x00\x00\x00\x00\x02'
+    msg += b'\x04\x53\x00\x00\x00\x00\x02\x58\x41\x00\x00\x02\x59\x53\x00\x00'
+    msg += b'\x00\x00\x02\x40\x53\x00\x00\x00\x00\x02\x41\x53\x00\x00\x00\x00'
+    msg += b'\x02\x40\x53\x00\x00\x00\x00\x02\x41\x53\x00\x00\x00\x00\x02\x44'
+    msg += b'\x53\x00\x00\x00\x00\x02\x45\x53\x00\x00\x00\x00\x02\x60\x53\x00'
+    msg += b'\x00\x00\x00\x02\x61\x53\x00\x00\x00\x00\x02\x60\x53\x00\x00\x00'
+    msg += b'\x00\x02\x20\x41\x00\x00\x02\x24\x53\x00\x00\x00\x00\x02\x24\x53'
+    msg += b'\x00\x00\x00\x00\x02\x26\x53\x00\x00\x00\x00\x02\x40\x53\x00\x00'
+    msg += b'\x00\x00\x02\x40\x53\x00\x00\x00\x00\x02\x80\x41\x00\x00\x02\x81'
+    msg += b'\x53\x00\x00\x00\x00\x02\x84\x53\x00\x00\x00\x00\x02\x85\x53\x00'
+    msg += b'\x00\x00\x00\x02\xc0\x53\x00\x00\x00\x00\x02\xc1\x53\x00\x00\x00'
+    msg += b'\x00\x02\xc0\x53\x00\x00\x00\x00\x02\xc1\x53\x00\x00\x00\x00\x02'
+    msg += b'\xc0\x53\x00\x00\x00\x00\x02\xc1\x53\x00\x00\x00\x00\x02\xc4\x53'
+    msg += b'\x00\x00\x00\x00\x02\x00\x53\x00\x00\x00\x00\x02\x80\x53\x00\x00'
+    msg += b'\x00\x00\x02\xc8\x42\x00\x00\x00\x00\x48\x42\x00\x00\x00\x00\x80'
+    msg += b'\x42\x00\x00\x00\x00\x04\x53\x00\x00\x00\x00\x01\x20\x53\x00\x00'
+    msg += b'\x00\x00\x01\x84\x53\x00\x10\x00\x00\x02\x40\x46\x00\x00\x00\x00'
+    msg += b'\x00\x00\x04\x04\x46\x02\x00\x46\x02\x00\x00\x04\x00\x46\x00\x00'
+    msg += b'\x00\x00\x00\x00\x05\x04\x42\x00\x00\x00\x05\x50\x42\x00\x00\x00'
+    msg += b'\x00\x14\x42\x00\x00\x00\x00\x00\x46\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\xa4\x46\x00\x00\x00\x00\x00\x00\x01\x00\x46\x00\x00\x00\x00\x00'
+    msg += b'\x00\x01\x44\x46\x00\x00\x00\x00\x00\x00\x02\x00\x46\x00\x00\x00'
+    msg += b'\x00\x00\x00\x08\x04\x46\x00\x00\x00\x00\x00\x00\x08\x90\x46\x00'
+    msg += b'\x00\x00\x00\x00\x00\x08\x54\x46\x00\x00\x00\x00\x00\x00\x09\x20'
+    msg += b'\x46\x00\x00\x00\x00\x00\x00\x08\x04\x46\x00\x00\x00\x00\x00\x00'
+    msg += b'\x08\x00\x46\x00\x00\x00\x00\x00\x00\x08\x84\x46\x00\x00\x00\x00'
+    msg += b'\x00\x00\x08\x40\x46\x00\x00\x00\x00\x00\x00\x09\x04\x46\x00\x00'
+    msg += b'\x00\x00\x00\x00\x0a\x10\x46\x00\x00\x00\x00\x00\x00\x0c\x14\x46'
+    msg += b'\x00\x00\x00\x00\x00\x00\x0c\x80\x46\x00\x00\x00\x00\x00\x00\x0c'
+    msg += b'\x24\x42\x00\x00\x00\x0d\x00\x42\x00\x00\x00\x00\x04\x42\x00\x00'
+    msg += b'\x00\x00\x00\x42\x00\x00\x00\x00\x44\x42\x00\x00\x00\x00\x10\x42'
+    msg += b'\x00\x00\x00\x01\x14\x53\x00\x00\x00\x00\x01\xa0\x53\x00\x00\x00'
+    msg += b'\x00\x10\x04\x53\x55\xaa\x00\x00\x10\x40\x53\x00\x00\x00\x00\x10'
+    msg += b'\x04\x53\x00\x00\x00\x00\x11\x00\x53\x00\x00\x00\x00\x11\x84\x53'
+    msg += b'\x00\x00\x00\x00\x10\x50\x53\xff\xff\x00\x00\x10\x14\x53\x03\x20'
+    msg += b'\x00\x00\x10\x00\x53\x00\x00\x00\x00\x11\x24\x53\x00\x00\x00\x00'
+    msg += b'\x03\x00\x53\x00\x00\x00\x00\x03\x64\x53\x00\x00\x00\x00\x04\x50'
+    msg += b'\x53\x00\x00\x00\x00\x00\x34\x53\x00\x00\x00\x00\x00\x00\x42\x02'
+    msg += b'\x00\x00\x01\x04\x42\x00\x00\x00\x21\x00\x42\x00\x00\x00\x21\x44'
+    msg += b'\x42\x00\x00\x00\x22\x10\x53\x00\x00\x00\x00\x28\x14\x42\x01\x00'
+    msg += b'\x00\x28\xa0\x46\x42\x48\x00\x00\x00\x00\x29\x04\x42\x00\x00\x00'
+    msg += b'\x29\x40\x42\x00\x00\x00\x28\x04\x46\x42\x10\x00\x00\x00\x00\x28'
+    msg += b'\x00\x42\x00\x00\x00\x28\x84\x42\x00\x00\x00\x28\x50\x42\x00\x00'
+    msg += b'\x00\x29\x14\x42\x00\x00\x00\x2a\x00\x42\x00\x00\x00\x2c\x24\x46'
+    msg += b'\x42\x10\x00\x00\x00\x00\x2c\x80\x42\x00\x00\x00\x2c\x44\x53\x00'
+    msg += b'\x02\x00\x00\x2d\x00\x42\x00\x00\x00\x20\x04\x46\x42\x4d\x00\x00'
+    msg += b'\x00\x00\x20\x10\x42\x00\x00\x00\x20\x54\x42\x00\x00\x00\x20\x20'
+    msg += b'\x42\x00\x00\x00\x21\x04\x53\x00\x01\x00\x00\x22\x00\x42\x00\x00'
+    msg += b'\x00\x30\x04\x42\x00\x00\x00\x30\x40\x53\x00\x00\x00\x00\x30\x04'
+    msg += b'\x53\x00\x00\x00\x00\x31\x10\x42\x00\x00\x00\x31\x94\x53\x00\x04'
+    msg += b'\x00\x00\x30\x00\x53\x00\x00\x00\x00\x30\x24\x53\x00\x00\x00\x00'
+    msg += b'\x30\x00\x53\x00\x00\x00\x00\x31\x04\x53\x00\x00\x00\x00\x31\x80'
+    msg += b'\x53\x00\x00\x00\x00\x32\x44\x53\x00\x00\x00\x00\x30\x00\x53\x00'
+    msg += b'\x00\x00\x00\x30\x80\x53\x00\x00\x00\x00\x30\x00\x53\x00\x00\x00'
+    msg += b'\x00\x30\x80\x53\x00\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x03\x00'
+    msg += b'\x00\x00\x00\x00'
+    return msg
+
 @pytest.fixture
 def MsgInverterAck(): # Get Time Request message
     return b'\x00\x00\x00\x14\x10R170000000000001\x99\x04\x01'
@@ -331,8 +435,7 @@ def test_read_message_in_chunks2(MsgContactInfo):
     assert int(m.ctrl)==145
     assert m.msg_id==0 
     assert m.msg_count == 1
-    while m.read(): # read rest of message
-        pass
+    m.read()         # read rest of message
     assert m.msg_count == 1
     assert not m.header_valid  # must be invalid, since msg was handled and buffer flushed
     m.close()
@@ -471,9 +574,10 @@ def test_msg_get_time(ConfigTsunInv1, MsgGetTime):
     assert int(m.ctrl)==145
     assert m.msg_id==34
     assert m.header_len==23
+    assert m.ts_offset==0
     assert m.data_len==0
     assert m._forward_buffer==MsgGetTime
-    assert m._send_buffer==b''
+    assert m._send_buffer==b'\x00\x00\x00\x1b\x10R170000000000001\x91"\x00\x00\x01\x89\xc6,_\x00'
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
     m.close()
 
@@ -489,9 +593,10 @@ def test_msg_get_time_autark(ConfigNoTsunInv1, MsgGetTime):
     assert int(m.ctrl)==145
     assert m.msg_id==34
     assert m.header_len==23
+    assert m.ts_offset==0
     assert m.data_len==0
     assert m._forward_buffer==b''
-    assert m._send_buffer==b'\x00\x00\x00\x1b\x10R170000000000001\x91"\x00\x00\x01\x8b\xdfs\xcc0'
+    assert m._send_buffer==bytearray(b'\x00\x00\x00\x1b\x10R170000000000001\x91"\x00\x00\x01\x89\xc6,_\x00')
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
     m.close()
 
@@ -507,8 +612,9 @@ def test_msg_time_resp(ConfigTsunInv1, MsgTimeResp):
     assert int(m.ctrl)==145
     assert m.msg_id==34
     assert m.header_len==23
+    assert m.ts_offset==3600000
     assert m.data_len==8
-    assert m._forward_buffer==MsgTimeResp
+    assert m._forward_buffer==b''
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
     m.close()
@@ -525,12 +631,32 @@ def test_msg_time_resp_autark(ConfigNoTsunInv1, MsgTimeResp):
     assert int(m.ctrl)==145
     assert m.msg_id==34
     assert m.header_len==23
+    assert m.ts_offset==3600000
     assert m.data_len==8
     assert m._forward_buffer==b''
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
     m.close()
 
+def test_msg_time_inv_resp(ConfigTsunInv1, MsgTimeRespInv):
+    ConfigTsunInv1
+    m = MemoryStream(MsgTimeRespInv, (0,), False)
+    m.db.stat['proxy']['Unknown_Ctrl'] = 0
+    m.read()         # read complete msg, and dispatch msg
+    assert not m.header_valid  # must be invalid, since msg was handled and buffer flushed
+    assert m.msg_count == 1
+    assert m.id_str == b"R170000000000001" 
+    assert m.unique_id == 'R170000000000001'
+    assert int(m.ctrl)==145
+    assert m.msg_id==34
+    assert m.header_len==23
+    assert m.ts_offset==0
+    assert m.data_len==4
+    assert m._forward_buffer==MsgTimeRespInv
+    assert m._send_buffer==b''
+    assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
+    m.close()
+
 def test_msg_time_invalid(ConfigTsunInv1, MsgTimeInvalid):
     ConfigTsunInv1
     m = MemoryStream(MsgTimeInvalid, (0,), False)
@@ -543,6 +669,7 @@ def test_msg_time_invalid(ConfigTsunInv1, MsgTimeInvalid):
     assert int(m.ctrl)==148
     assert m.msg_id==34
     assert m.header_len==23
+    assert m.ts_offset==0
     assert m.data_len==0
     assert m._forward_buffer==MsgTimeInvalid
     assert m._send_buffer==b''
@@ -560,6 +687,7 @@ def test_msg_time_invalid_autark(ConfigNoTsunInv1, MsgTimeInvalid):
     assert m.unique_id == 'R170000000000001'
     assert int(m.ctrl)==148
     assert m.msg_id==34
+    assert m.ts_offset==0
     assert m.header_len==23
     assert m.data_len==0
     assert m._forward_buffer==b''
@@ -567,7 +695,7 @@ def test_msg_time_invalid_autark(ConfigNoTsunInv1, MsgTimeInvalid):
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 1
     m.close()
 
-def test_msg_cntrl_ind(ConfigTsunInv1, MsgControllerInd, MsgControllerAck):
+def test_msg_cntrl_ind(ConfigTsunInv1, MsgControllerInd, MsgControllerIndTsOffs, MsgControllerAck):
     ConfigTsunInv1
     m = MemoryStream(MsgControllerInd, (0,))
     m.db.stat['proxy']['Unknown_Ctrl'] = 0
@@ -580,7 +708,12 @@ def test_msg_cntrl_ind(ConfigTsunInv1, MsgControllerInd, MsgControllerAck):
     assert m.msg_id==113
     assert m.header_len==23
     assert m.data_len==284
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgControllerInd
+    m.ts_offset = -4096
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgControllerIndTsOffs
     assert m._send_buffer==MsgControllerAck
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
     m.close()
@@ -616,12 +749,17 @@ def test_msg_cntrl_invalid(ConfigTsunInv1, MsgControllerInvalid):
     assert m.msg_id==113
     assert m.header_len==23
     assert m.data_len==1
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgControllerInvalid
+    m.ts_offset = -4096
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgControllerInvalid
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 1
     m.close()
 
-def test_msg_inv_ind(ConfigTsunInv1, MsgInverterInd, MsgInverterAck):
+def test_msg_inv_ind(ConfigTsunInv1, MsgInverterInd, MsgInverterIndTsOffs, MsgInverterAck):
     ConfigTsunInv1
     tracer.setLevel(logging.DEBUG)
     m = MemoryStream(MsgInverterInd, (0,))
@@ -635,11 +773,62 @@ def test_msg_inv_ind(ConfigTsunInv1, MsgInverterInd, MsgInverterAck):
     assert m.msg_id==4
     assert m.header_len==23
     assert m.data_len==120
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgInverterInd
+    m.ts_offset = +256
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgInverterIndTsOffs
     assert m._send_buffer==MsgInverterAck
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
     m.close()
-        
+
+def test_msg_inv_ind2(ConfigTsunInv1, MsgInverterIndNew, MsgInverterIndTsOffs, MsgInverterAck):
+    ConfigTsunInv1
+    tracer.setLevel(logging.DEBUG)
+    m = MemoryStream(MsgInverterIndNew, (0,))
+    m.db.stat['proxy']['Unknown_Ctrl'] = 0
+    m.db.stat['proxy']['Invalid_Data_Type'] = 0
+    m.read()         # read complete msg, and dispatch msg
+    assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
+    assert m.db.stat['proxy']['Invalid_Data_Type'] == 0
+    assert not m.header_valid  # must be invalid, since msg was handled and buffer flushed
+    assert m.msg_count == 1
+    assert m.id_str == b"R170000000000001" 
+    assert m.unique_id == 'R170000000000001'
+    assert int(m.ctrl)==145
+    assert m.msg_id==4
+    assert m.header_len==23
+    assert m.data_len==1165
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgInverterIndNew
+    assert m._send_buffer==MsgInverterAck
+    m.close()
+
+def test_msg_inv_ind2(ConfigTsunInv1, MsgInverterIndNew, MsgInverterIndTsOffs, MsgInverterAck):
+    ConfigTsunInv1
+    tracer.setLevel(logging.DEBUG)
+    m = MemoryStream(MsgInverterIndNew, (0,))
+    m.db.stat['proxy']['Unknown_Ctrl'] = 0
+    m.db.stat['proxy']['Invalid_Data_Type'] = 0
+    m.read()         # read complete msg, and dispatch msg
+    assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
+    assert m.db.stat['proxy']['Invalid_Data_Type'] == 0
+    assert not m.header_valid  # must be invalid, since msg was handled and buffer flushed
+    assert m.msg_count == 1
+    assert m.id_str == b"R170000000000001" 
+    assert m.unique_id == 'R170000000000001'
+    assert int(m.ctrl)==145
+    assert m.msg_id==4
+    assert m.header_len==23
+    assert m.data_len==1165
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgInverterIndNew
+    assert m._send_buffer==MsgInverterAck
+    m.close()
+
 def test_msg_inv_ack(ConfigTsunInv1, MsgInverterAck):
     ConfigTsunInv1
     tracer.setLevel(logging.ERROR)
@@ -673,6 +862,11 @@ def test_msg_inv_invalid(ConfigTsunInv1, MsgInverterInvalid):
     assert m.msg_id==4
     assert m.header_len==23
     assert m.data_len==1
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgInverterInvalid
+    m.ts_offset = 256
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgInverterInvalid
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 1
@@ -692,6 +886,11 @@ def test_msg_ota_req(ConfigTsunInv1, MsgOtaReq):
     assert m.msg_id==19
     assert m.header_len==23
     assert m.data_len==259
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgOtaReq
+    m.ts_offset = 4096
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgOtaReq
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
@@ -714,6 +913,11 @@ def test_msg_ota_ack(ConfigTsunInv1, MsgOtaAck):
     assert m.msg_id==19
     assert m.header_len==23
     assert m.data_len==1
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
+    assert m._forward_buffer==MsgOtaAck
+    m.ts_offset = 256
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgOtaAck
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
@@ -734,7 +938,12 @@ def test_msg_ota_invalid(ConfigTsunInv1, MsgOtaInvalid):
     assert m.msg_id==19
     assert m.header_len==23
     assert m.data_len==1
+    m.ts_offset = 0
+    m._update_header(m._forward_buffer)
     assert m._forward_buffer==MsgOtaInvalid
+    m.ts_offset = 4096
+    assert m._forward_buffer==MsgOtaInvalid
+    m._update_header(m._forward_buffer)
     assert m._send_buffer==b''
     assert m.db.stat['proxy']['Unknown_Ctrl'] == 1
     assert m.db.stat['proxy']['OTA_Start_Msg'] == 0
@@ -847,7 +1056,7 @@ def test_msg_modbus_req(ConfigTsunInv1, MsgModbusCmd):
     ConfigTsunInv1
     m = MemoryStream(b'')
     m.id_str = b"R170000000000001" 
-    m.state = m.STATE_UP
+    m.state = State.up
 
     c = m.createClientStream(MsgModbusCmd)
     
@@ -953,6 +1162,29 @@ def test_msg_modbus_rsp1(ConfigTsunInv1, MsgModbusRsp):
     assert m.db.stat['proxy']['Modbus_Command'] == 0
     m.close()
 
+def test_msg_modbus_cloud_rsp(ConfigTsunInv1, MsgModbusRsp):
+    '''Modbus response from TSUN without a valid Modbus request must be dropped'''
+    ConfigTsunInv1
+    m = MemoryStream(MsgModbusRsp, (0,), False)
+    m.db.stat['proxy']['Unknown_Ctrl'] = 0
+    m.db.stat['proxy']['Unknown_Msg'] = 0
+    m.db.stat['proxy']['Modbus_Command'] = 0
+    m.read()         # read complete msg, and dispatch msg
+    assert not m.header_valid  # must be invalid, since msg was handled and buffer flushed
+    assert m.msg_count == 1
+    assert m.id_str == b"R170000000000001" 
+    assert m.unique_id == 'R170000000000001'
+    assert int(m.ctrl)==145
+    assert m.msg_id==119
+    assert m.header_len==23
+    assert m.data_len==13
+    assert m._forward_buffer==b''
+    assert m._send_buffer==b''
+    assert m.db.stat['proxy']['Unknown_Msg'] == 1
+    assert m.db.stat['proxy']['Unknown_Ctrl'] == 0
+    assert m.db.stat['proxy']['Modbus_Command'] == 0
+    m.close()
+
 def test_msg_modbus_rsp2(ConfigTsunInv1, MsgModbusResp20):
     '''Modbus response with a valid Modbus request must be forwarded'''
     ConfigTsunInv1
@@ -1097,7 +1329,7 @@ async def test_msg_build_modbus_req(ConfigTsunInv1, MsgModbusCmd):
     assert m._send_buffer == b''
     assert m.writer.sent_pdu == b''
 
-    m.state = m.STATE_UP
+    m.state = State.up
     await m.send_modbus_cmd(Modbus.WRITE_SINGLE_REG, 0x2008, 0, logging.DEBUG)
     assert 0 == m.send_msg_ofs
     assert m._forward_buffer == b''
@@ -1127,21 +1359,21 @@ def test_zombie_conn(ConfigTsunInv1, MsgInverterInd):
     m3 = MemoryStream(MsgInverterInd, (0,))
     assert MemoryStream._RefNo == 3 + start_val
     assert m3.RefNo == 3 + start_val
-    assert m1.state == m1.STATE_INIT
-    assert m2.state == m2.STATE_INIT
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.init
+    assert m2.state == m2.State.init
+    assert m3.state == m3.State.init
     m1.read()         # read complete msg, and set unique_id
-    assert m1.state == m1.STATE_UP
-    assert m2.state == m2.STATE_INIT
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.up
+    assert m2.state == m2.State.init
+    assert m3.state == m3.State.init
     m2.read()         # read complete msg, and set unique_id
-    assert m1.state == m1.STATE_CLOSED
-    assert m2.state == m2.STATE_UP
-    assert m3.state == m3.STATE_INIT
+    assert m1.state == m1.State.closed
+    assert m2.state == m2.State.up
+    assert m3.state == m3.State.init
     m3.read()         # read complete msg, and set unique_id
-    assert m1.state == m1.STATE_CLOSED
-    assert m2.state == m2.STATE_CLOSED
-    assert m3.state == m3.STATE_UP
+    assert m1.state == m1.State.closed
+    assert m2.state == m2.State.closed
+    assert m3.state == m3.State.up
     m1.close()
     m2.close()
     m3.close()
diff --git a/app/tests/timestamp_old.svg b/app/tests/timestamp_old.svg
new file mode 100644
index 0000000..739a420
--- /dev/null
+++ b/app/tests/timestamp_old.svg
@@ -0,0 +1,2 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="624.75" height="952">
+<defs><marker id="arrow-filled" refX="6" refY="3" markerWidth="6" markerHeight="6" orient="auto"><path d="M0,0 6,3 0,6z" style="stroke: none; fill: black;"></path></marker><marker id="arrow-open" refX="6" refY="3" markerWidth="6" markerHeight="6" orient="auto"><path d="M0,0 6,3 0,6" style="stroke-width: 1; fill: none; stroke: black;"></path></marker></defs><rect width="88" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="10" y="20"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="54" y="39" style="text-anchor: middle; alignment-baseline: central;">Inverter</text></g><rect width="88" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="10" y="894"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="54" y="913" style="text-anchor: middle; alignment-baseline: central;">Inverter</text></g><path d="M54,58 v836" style="stroke-width: 1; fill: none; stroke: black;"></path><rect width="62.5" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="195.75" y="20"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="227" y="39" style="text-anchor: middle; alignment-baseline: central;">Proxy</text></g><rect width="62.5" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="195.75" y="894"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="227" y="913" style="text-anchor: middle; alignment-baseline: central;">Proxy</text></g><path d="M227,58 v836" style="stroke-width: 1; fill: none; stroke: black;"></path><rect width="62.5" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="398.75" y="20"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="430" y="39" style="text-anchor: middle; alignment-baseline: central;">Cloud</text></g><rect width="62.5" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="398.75" y="894"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="430" y="913" style="text-anchor: middle; alignment-baseline: central;">Cloud</text></g><path d="M430,58 v836" style="stroke-width: 1; fill: none; stroke: black;"></path><rect width="113.5" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="481.25" y="20"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="538" y="39" style="text-anchor: middle; alignment-baseline: central;">MQTT-Broker</text></g><rect width="113.5" height="38" style="stroke-width: 1; fill: none; stroke: black;" x="481.25" y="894"></rect><g><text fill="black" font-family="Helvetica,sans-Serif" x="538" y="913" style="text-anchor: middle; alignment-baseline: central;">MQTT-Broker</text></g><path d="M538,58 v836" style="stroke-width: 1; fill: none; stroke: black;"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="83" style="text-anchor: middle; alignment-baseline: central;">ContactInd</text></g><path d="M54,96 h173" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><path d="M403,116 L403,123 L410,123 L403,116 L247,116 L247,162 L410,162 L410,123 Z" style="stroke-width: 1; fill: cornsilk; stroke: black;"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="130" style="text-anchor: middle; alignment-baseline: central;">store Contact Info</text><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="148" style="text-anchor: middle; alignment-baseline: central;">in proxy</text></g><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="187" style="text-anchor: middle; alignment-baseline: central;">ContactRsp (Ok)</text></g><path d="M227,200 h-173" style="stroke-width: 1; fill: none; stroke: black;" stroke-dasharray="7,4" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="225" style="text-anchor: middle; alignment-baseline: central;">getTimeReq</text></g><path d="M54,238 h173" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="263" style="text-anchor: middle; alignment-baseline: central;">ContactInd</text></g><path d="M227,276 h203" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="301" style="text-anchor: middle; alignment-baseline: central;">ContactRsp (Ok)</text></g><path d="M430,314 h-203" style="stroke-width: 1; fill: none; stroke: black;" stroke-dasharray="7,4" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="339" style="text-anchor: middle; alignment-baseline: central;">getTimeReq</text></g><path d="M227,352 h203" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="377" style="text-anchor: middle; alignment-baseline: central;">TimeRsp (time)</text></g><path d="M430,390 h-203" style="stroke-width: 1; fill: none; stroke: black;" stroke-dasharray="7,4" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="415" style="text-anchor: middle; alignment-baseline: central;">TimeRsp (time)</text></g><path d="M227,428 h-173" style="stroke-width: 1; fill: none; stroke: black;" stroke-dasharray="7,4" marker-end="url(#arrow-filled)"></path><path d="M179,448 L179,455 L186,455 L179,448 L74,448 L74,494 L186,494 L186,455 Z" style="stroke-width: 1; fill: cornsilk; stroke: black;"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="130" y="462" style="text-anchor: middle; alignment-baseline: central;">set clock in</text><text fill="black" font-family="Helvetica,sans-Serif" x="130" y="480" style="text-anchor: middle; alignment-baseline: central;">inverter</text></g><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="519" style="text-anchor: middle; alignment-baseline: central;">DataInd (ts:=time)</text></g><path d="M54,532 h173" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="557" style="text-anchor: middle; alignment-baseline: central;">DataRsp</text></g><path d="M227,570 h-173" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="595" style="text-anchor: middle; alignment-baseline: central;">DataInd (ts)</text></g><path d="M227,608 h203" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-open)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="382.5" y="633" style="text-anchor: middle; alignment-baseline: central;">DataInd</text></g><path d="M227,646 h311" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-open)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="671" style="text-anchor: middle; alignment-baseline: central;">DataRsp</text></g><path d="M430,684 h-203" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-open)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="709" style="text-anchor: middle; alignment-baseline: central;">DataInd (ts:=time)</text></g><path d="M54,722 h173" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="140.5" y="747" style="text-anchor: middle; alignment-baseline: central;">DataRsp</text></g><path d="M227,760 h-173" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-filled)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="785" style="text-anchor: middle; alignment-baseline: central;">DataInd (ts)</text></g><path d="M227,798 h203" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-open)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="382.5" y="823" style="text-anchor: middle; alignment-baseline: central;">DataInd</text></g><path d="M227,836 h311" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-open)"></path><g><text fill="black" font-family="Helvetica,sans-Serif" x="328.5" y="861" style="text-anchor: middle; alignment-baseline: central;">DataRsp</text></g><path d="M430,874 h-203" style="stroke-width: 1; fill: none; stroke: black;" marker-end="url(#arrow-open)"></path></svg>
\ No newline at end of file
diff --git a/app/tests/timestamp_old.yuml b/app/tests/timestamp_old.yuml
new file mode 100644
index 0000000..8f2e99c
--- /dev/null
+++ b/app/tests/timestamp_old.yuml
@@ -0,0 +1,26 @@
+// {type:sequence}
+// {generate:true}
+
+[Inverter]ContactInd>[Proxy] 
+[Proxy]-[note: store Contact Info in proxy{bg:cornsilk}]
+[Proxy]ContactRsp (Ok).>[Inverter]
+
+[Inverter]getTimeReq>[Proxy]
+[Proxy]ContactInd>[Cloud]
+[Cloud]ContactRsp (Ok).>[Proxy]
+[Proxy]getTimeReq>[Cloud]
+[Cloud]TimeRsp (time).>[Proxy]
+[Proxy]TimeRsp (time).>[Inverter]
+[Inverter]-[note: set clock in inverter{bg:cornsilk}]
+
+[Inverter]DataInd (ts:=time)>[Proxy] 
+[Proxy]DataRsp>[Inverter] 
+[Proxy]DataInd (ts)>>[Cloud] 
+[Proxy]DataInd>>[MQTT-Broker] 
+[Cloud]DataRsp>>[Proxy]
+
+[Inverter]DataInd (ts:=time)>[Proxy] 
+[Proxy]DataRsp>[Inverter] 
+[Proxy]DataInd (ts)>>[Cloud] 
+[Proxy]DataInd>>[MQTT-Broker] 
+[Cloud]DataRsp>>[Proxy] 
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 4566a80..9b4f9e8 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -77,10 +77,15 @@ services:
       - ${DNS2:-4.4.4.4}
     ports: 
       - 5005:5005
+      - 8127:8127
       - 10000:10000
     volumes:
       - ${PROJECT_DIR:-./}tsun-proxy/log:/home/tsun-proxy/log 
       - ${PROJECT_DIR:-./}tsun-proxy/config:/home/tsun-proxy/config 
+    healthcheck:
+      test: wget --no-verbose --tries=1 --spider  http://localhost:8127/-/healthy || exit 1
+      interval: 10s
+      timeout: 3s    
     networks:
       - outside
 
diff --git a/system_tests/test_tcp_socket_v2.py b/system_tests/test_tcp_socket_v2.py
index c41b41c..5e978de 100644
--- a/system_tests/test_tcp_socket_v2.py
+++ b/system_tests/test_tcp_socket_v2.py
@@ -89,6 +89,24 @@ def MsgDataResp(): # Contact Response message
     return msg
 
 
+@pytest.fixture
+def MsgInvalidInfo(): # Contact Info message wrong start byte
+    msg  = b'\x47\xd4\x00\x10\x41\x00\x01' +get_sn()  +b'\x02\xba\xd2\x00\x00'
+    msg += b'\x19\x00\x00\x00\x00\x00\x00\x00\x05\x3c\x78\x01\x64\x01\x4c\x53'
+    msg += b'\x57\x35\x42\x4c\x45\x5f\x31\x37\x5f\x30\x32\x42\x30\x5f\x31\x2e'
+    msg += b'\x30\x35\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x40\x2a\x8f\x4f\x51\x54\x31\x39\x32\x2e'
+    msg += b'\x31\x36\x38\x2e\x38\x30\x2e\x34\x39\x00\x00\x00\x0f\x00\x01\xb0'
+    msg += b'\x02\x0f\x00\xff\x56\x31\x2e\x31\x2e\x30\x30\x2e\x30\x42\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfe\xfe\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x41\x6c\x6c\x69\x75\x73\x2d\x48\x6f'
+    msg += b'\x6d\x65\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
+    msg += b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x3c'
+    msg += b'\x15'
+    return msg
 
 
 @pytest.fixture(scope="session")
@@ -155,4 +173,22 @@ def test_data_ind(ClientConnection,MsgDataInd, MsgDataResp):
     # time.sleep(2.5)
     checkResponse(data, MsgDataResp)
 
+def test_inavlid_msg(ClientConnection,MsgInvalidInfo,MsgContactInfo, MsgContactResp):
+    s = ClientConnection
+    try:
+        s.sendall(MsgInvalidInfo)
+        # time.sleep(2.5)
+        data = s.recv(1024)
+    except TimeoutError:
+        pass
+    # time.sleep(2.5)
+    try:
+        s.sendall(MsgContactInfo)
+        # time.sleep(2.5)
+        data = s.recv(1024)
+    except TimeoutError:
+        pass
+    # time.sleep(2.5)
+    checkResponse(data, MsgContactResp)
+
     
\ No newline at end of file