EW11 connection won't work

[jodewee]

Describe the issue

Hi,
i connected the cables as described, but do net get any info into the modbus gateway.
Do you have any screenshots available of the EW11 config?

Bescribe your Huawei Solar Setup

Inverter Type:
Inverter Firmware version:
SDongle present: yes / no
Power meter present: three phase / single phase / no
Battery: LG RESU xxkWh / LUNA2000 xxkWh / None
Battery Firmware version:

How do you connect to the inverter?

Over serial, with a serial-to-USB stick

Upload your Diagnostics File

Drag & Drop your Diagnostics File here.

Upload your relevant debug logs

/
connect to inverter failed

Please confirm the following:

• The problem is still present in the latest release of this integration.
• I did not find an existing issue describing this problem.
• I did upload the diagnostics-file that I could retrieve from the 'Devices & Services Page'
• I increased the logging configuration, restarted HA, and have copied all relevant log lines from the 'Full Logs' into the textarea.

[jodewee]

error:
Reading from the inverter failed.

[jodewee]

[jodewee]

Logger: huawei_solar.huawei_solar
Source: /usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py:129
First occurred: 16:54:57 (3 occurrences)
Last logged: 16:59:03

Aborting client creation due to error.
Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 280, in _do_read
response = await self._client.protocol.read_holding_registers(
File "/usr/local/lib/python3.10/site-packages/pymodbus/client/base.py", line 295, in execute
resp = await asyncio.wait_for(req, timeout=self.params.timeout)
File "/usr/local/lib/python3.10/asyncio/tasks.py", line 445, in wait_for
return fut.result()
pymodbus.exceptions.ConnectionException: Modbus Error: [Connection] Connection lost during request

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 123, in create
await huawei_solar._initialize()
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 85, in _initialize
self.time_zone = (await self.get(rn.TIME_ZONE)).value
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 198, in get
return (await self.get_multiple([name], slave))[0]
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 233, in get_multiple
response = await self._read_registers(registers[0].register, total_length, slave)
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 313, in _read_registers
result = await _do_read()
File "/usr/local/lib/python3.10/site-packages/backoff/_async.py", line 151, in retry
ret = await target(*args, **kwargs)
File "/usr/local/lib/python3.10/site-packages/huawei_solar/huawei_solar.py", line 309, in _do_read
raise ReadException(message) from err
huawei_solar.exceptions.ReadException: Could not read register value, has another device interrupted the connection?

[jodewee]

as a fact, i think i do have the s-dongle installed to

[wlcrs]

As stated on the Wiki: ⚠Warning⚠: The SDongleA-05 dongle interferes with devices connected to the RS485A1 and RS485B1 pins on the inverter. If your inverter has such a dongle installed, we recommend connecting to the Modbus-TCP port exposed by that dongle instead.

[henfri]

I am having the same issue and can confirm that s-dongle and Modbus-RTU does not work (interfere is for my case not a strong enough expression).

@wlcrs Is there any way to use RTU and the s-dongle at the same time?

[wlcrs]

No

[henfri]

Ok, thanks.