control access via AT commands

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- add allow and block filter for AT+ commands
 - catch all OSError errors in the read loop
 - log Modbus traces with different log levels
 - add Modbus fifo and timeout handler

README.md

@@ -47,7 +47,9 @@ If you use a Pi-hole, you can also store the host entry in the Pi-hole.
 - `AT-Command` support via MQTT topics (GEN3PLUS only)
 - Faster DataUp interval sends measurement data to the MQTT broker every minute
 - Self-sufficient island operation without internet
-- Runs in a non-root Docker Container
+- Security-Features:
+  - control access via `AT commands`
+  - Runs in a non-root Docker Container
 
 ## Home Assistant Screenshots