Issue with network modbus connection : "unexpected error" , but the inverter is reachable !

[feeling001]

Since a few days, I have an issue with my integration.

Hardware : EW11
Software : homeassistant (latest) 2025.2.0
Huawei Solar integration : 1.5.3

I use homeassistant in "docker mode". (with docker compose).

Error message in the homeassisstant integration :
unexpected error

Error in homeassistant log :

 2025-02-09 14:08:59.139 ERROR (MainThread) [pymodbus.logging] No response received after 3 retries, continue with next request
 2025-02-09 14:08:59.140 ERROR (MainThread) [custom_components.huawei_solar.config_flow] Unexpected exception while connecting via ModbusTCP
 Traceback (most recent call last):
   File "/config/custom_components/huawei_solar/config_flow.py", line 508, in async_step_setup_network
     info = await validate_network_setup_auto_slave_discovery(
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     ...<3 lines>...
     )
     ^
   File "/config/custom_components/huawei_solar/config_flow.py", line 100, in validate_network_setup_auto_slave_discovery
     bridge = await create_tcp_bridge(
              ^^^^^^^^^^^^^^^^^^^^^^^^
     ...<3 lines>...
     )
     ^
   File "/.local/lib/python3.13/site-packages/huawei_solar/bridge.py", line 658, in create_tcp_bridge
     return await _create(await AsyncHuaweiSolar.create(host, port, slave_id), slave_id)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/.local/lib/python3.13/site-packages/huawei_solar/bridge.py", line 684, in _create
     product_info = await HuaweiSolarProductInfo.retrieve_from_device(client, slave_id)
                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/.local/lib/python3.13/site-packages/huawei_solar/bridge.py", line 67, in retrieve_from_device
     ) = await client.get_multiple(
         ^^^^^^^^^^^^^^^^^^^^^^^^^^
     ...<8 lines>...
     )
     ^
   File "/.local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 292, in get_multiple
     response = await self._read_registers(
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^
     ...<3 lines>...
     )
     ^
   File "/.local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 429, in _read_registers
     return await _do_read()
            ^^^^^^^^^^^^^^^^
   File "/usr/local/lib/python3.13/site-packages/backoff/_async.py", line 151, in retry
     ret = await target(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/usr/local/lib/python3.13/site-packages/backoff/_async.py", line 151, in retry
     ret = await target(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   File "/.local/lib/python3.13/site-packages/huawei_solar/huawei_solar.py", line 377, in _do_read
     response = await self._client.read_holding_registers(
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
     ...<3 lines>...
     )
     ^
   File "/.local/lib/python3.13/site-packages/pymodbus/transaction/transaction.py", line 155, in execute
     raise ModbusIOException(txt)
 pymodbus.exceptions.ModbusIOException: Modbus Error: [Input/Output] No response received after 3 retries, continue with next request

I can query the inverter trough the modbus network ew11 using nodered and modbus integration ... so :

• The network is not an issue
• The serial-modbus converter is working (EW11)
• The inverter is correctly connected to the EW11
• The integration was working until mid-january.

When I try to define manually the "client id" (to 0 or 1) , I get the message :
2025-02-09 15:06:35.059 INFO (MainThread) [backoff] Backing off _do_read(...) for 1.0s (huawei_solar.exceptions.ConnectionInterruptedException: Modbus client is not connected to the inverter)

any idea ?

[amaduain]

Hi, I have something similar, for me the fix was to update to 1.5.4, and when you try to add the integration, instead of using AUTO on the settings, use the Slave ID, in my case was 1.
After that it worked as expected.

[feeling001]

Fixed for me too, 1.5.3 was definitly buggy :-)
Thanks.
L.