diff --git a/app/src/gen3plus/solarman_v5.py b/app/src/gen3plus/solarman_v5.py
index 355890b..76d9297 100755
--- a/app/src/gen3plus/solarman_v5.py
+++ b/app/src/gen3plus/solarman_v5.py
@@ -341,9 +341,9 @@ class SolarmanV5(SolarmanBase):
         self.log_lvl.clear()
         super().close()
 
-    async def send_start_cmd(self, snr: int, host: str,
-                             forward: bool,
-                             start_timeout=MB_CLIENT_DATA_UP):
+    def send_start_cmd(self, snr: int, host: str,
+                       forward: bool,
+                       start_timeout=MB_CLIENT_DATA_UP):
         self.no_forwarding = True
         self.establish_inv_emu = forward
         self.snr = snr
diff --git a/app/src/modbus_tcp.py b/app/src/modbus_tcp.py
index 49786df..f51eef0 100644
--- a/app/src/modbus_tcp.py
+++ b/app/src/modbus_tcp.py
@@ -66,7 +66,7 @@ class ModbusTcp():
             try:
                 async with ModbusConn(host, port) as inverter:
                     stream = inverter.local.stream
-                    await stream.send_start_cmd(snr, host, forward)
+                    stream.send_start_cmd(snr, host, forward)
                     await stream.ifc.loop()
                     logger.info(f'[{stream.node_id}:{stream.conn_no}] '
                                 f'Connection closed - Shutdown: '
diff --git a/app/tests/test_solarman.py b/app/tests/test_solarman.py
index 3365703..71ad8f7 100755
--- a/app/tests/test_solarman.py
+++ b/app/tests/test_solarman.py
@@ -2318,7 +2318,7 @@ async def test_start_client_mode(my_loop, config_tsun_inv1, str_test_ip):
     assert m.no_forwarding == False
     assert m.mb_timer.tim == None
     assert asyncio.get_running_loop() == m.mb_timer.loop
-    await m.send_start_cmd(get_sn_int(), str_test_ip, False, m.mb_first_timeout)
+    m.send_start_cmd(get_sn_int(), str_test_ip, False, m.mb_first_timeout)
     assert m.sent_pdu==bytearray(b'\xa5\x17\x00\x10E\x01\x00!Ce{\x02\xb0\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x030\x00\x000J\xde\xf1\x15')
     assert m.db.get_db_value(Register.IP_ADDRESS) == str_test_ip
     assert isclose(m.db.get_db_value(Register.POLLING_INTERVAL), 0.5)
@@ -2351,7 +2351,7 @@ async def test_start_client_mode_scan(config_tsun_scan_dcu, str_test_ip, dcu_mod
     assert m.no_forwarding == False
     assert m.mb_timer.tim == None
     assert asyncio.get_running_loop() == m.mb_timer.loop
-    await m.send_start_cmd(get_dcu_sn_int(), str_test_ip, False, m.mb_first_timeout)
+    m.send_start_cmd(get_dcu_sn_int(), str_test_ip, False, m.mb_first_timeout)
     assert m.mb_start_reg == 0x0000
     assert m.mb_step == 0x100
     assert m.mb_bytes == 0x2d
diff --git a/app/tests/test_solarman_emu.py b/app/tests/test_solarman_emu.py
index a3d517c..d511f22 100644
--- a/app/tests/test_solarman_emu.py
+++ b/app/tests/test_solarman_emu.py
@@ -144,7 +144,7 @@ async def test_emu_start(my_loop, config_tsun_inv1, msg_modbus_rsp, str_test_ip,
     inv = InvStream(msg_modbus_rsp)
 
     assert asyncio.get_running_loop() == inv.mb_timer.loop
-    await inv.send_start_cmd(get_sn_int(), str_test_ip, True, inv.mb_first_timeout)
+    inv.send_start_cmd(get_sn_int(), str_test_ip, True, inv.mb_first_timeout)
     inv.read()         # read complete msg, and dispatch msg
     assert not inv.header_valid  # must be invalid, since msg was handled and buffer flushed
     assert inv.msg_count == 1
@@ -161,7 +161,7 @@ async def test_snd_hb(my_loop, config_tsun_inv1, heartbeat_ind):
     inv = InvStream()
     cld = CldStream(inv)
 
-    # await inv.send_start_cmd(get_sn_int(), str_test_ip, False, inv.mb_first_timeout)
+    # inv.send_start_cmd(get_sn_int(), str_test_ip, False, inv.mb_first_timeout)
     cld.send_heartbeat_cb(0)
     assert cld.ifc.tx_fifo.peek() == heartbeat_ind
     cld.close()
@@ -178,7 +178,7 @@ async def test_snd_inv_data(my_loop, config_tsun_inv1, inverter_ind_msg, inverte
     inv.db.set_db_def_value(Register.GRID_FREQUENCY, 50.05)
     inv.db.set_db_def_value(Register.PROD_COMPL_TYPE, 6)
     assert asyncio.get_running_loop() == inv.mb_timer.loop
-    await inv.send_start_cmd(get_sn_int(), str_test_ip, False, inv.mb_first_timeout)
+    inv.send_start_cmd(get_sn_int(), str_test_ip, False, inv.mb_first_timeout)
     inv.db.set_db_def_value(Register.DATA_UP_INTERVAL, 17)  # set test value
 
     cld = CldStream(inv)
@@ -213,7 +213,7 @@ async def test_rcv_invalid(my_loop, config_tsun_inv1, inverter_ind_msg, inverter
     _ = config_tsun_inv1
     inv = InvStream()
     assert asyncio.get_running_loop() == inv.mb_timer.loop
-    await inv.send_start_cmd(get_sn_int(), str_test_ip, False, inv.mb_first_timeout)
+    inv.send_start_cmd(get_sn_int(), str_test_ip, False, inv.mb_first_timeout)
     inv.db.set_db_def_value(Register.DATA_UP_INTERVAL, 17)  # set test value
 
     cld = CldStream(inv)