unknown error - 'ModbusIOException' object has no attribute 'registers'

[moerlien]

I have a DTSU666 connected to a Waveshare RS485 to Eth.

the waveshare link led gets blue for a few seconds, when clicking okay in the Integration, the gets green again, after Integration says unknown error.

Unfortunately, a connection to my DTSU is not working while getting unknown error message.

Here is the log entry:

'ModbusIOException' object has no attribute 'registers'

Traceback (most recent call last):
File "/config/custom_components/chint_pm/config_flow.py", line 387, in async_step_setup_network
info = await validate_network_setup(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/config/custom_components/chint_pm/config_flow.py", line 145, in validate_network_setup
decoder = BinaryPayloadDecoder.fromRegisters(rr.registers, byteorder=Endian.BIG)
^^^^^^^^^^^^
AttributeError: 'ModbusIOException' object has no attribute 'registers'

Any idea what went wrong?

[moerlien]

I got me an EW11 now like you are using for your system. But I get the same error message like with my waveshare.

Could there be a problem with my Chint Powermeter?n

[PJF16]

I have the same problem with my Chint PM and Waveshare RS485.

[moerlien]

I have now broken it down so far that it is due to homeassistant.
I also got an Eastron SDM72D-M to test whether it's the chint. Doesn't work on EW11 or Waveshare either.
Then tried a USB adapter. This allows the registers of both smart meters to be queried without any problems.
I was able to retrieve the registers of both smart meters on the EW11 using a Windows tool. Only Homeassistant does not work.
I set up another RasPi with a fresh HA. Did not work either. Neither did regular Modbus integration.
I have now set up an EVCC system. This allowed the values of the smart meter to be retrieved with the integrated meter module for the SDM72D-M.
Next I will probably have a look at ioBroker. Maybe that will work.