Goodwe integration not working with LAN module

[ivik]

The problem

I have a GW15K-ET which works fine with HA GoodWe integration when using the Wifi module.
But as soon as I change to the LAN/WIFI module then HA is not able to find it anymore.

I remove everything and start new integration, I give it the LAN IP and it says "Unknown error occurred"
Same if I give it Wifi IP from the LAN/Wifi module.

But If I remove everything again, change to only Wifi module and give it the IP then it works great.

LAN/Wifi module works as I can see data in SEMS portal.

I found some info in the logs, please see below

What version of Home Assistant Core has the issue?

core-2024.3.3

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

GoodWe inverter

Link to integration documentation on our website

https://www.home-assistant.io/integrations/goodwe

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

File "/usr/src/homeassistant/homeassistant/components/goodwe/config_flow.py", line 36, in async_step_user
    inverter = await connect(host=host, retries=10)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/goodwe/__init__.py", line 52, in connect
    return await discover(host, timeout, retries)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/goodwe/__init__.py", line 72, in discover
    response = await DISCOVERY_COMMAND.execute(host, timeout, retries)
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/goodwe/protocol.py", line 109, in execute
    await response_future
  File "/usr/local/lib/python3.12/asyncio/selector_events.py", line 1228, in _read_ready
    data, addr = self._sock.recvfrom(self.max_size)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
ConnectionRefusedError: [Errno 111] Connection refused

Additional information

No response

[home-assistant]

Hey there @mletenay, @starkillerOG, mind taking a look at this issue as it has been labeled with an integration (goodwe) you are listed as a code owner for? Thanks!

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[RalfWinter]

I had the LAN module in my GW15K-ET and in general it works. The problem is the change of IP address. I preferred to use the already discovered instance in order to keep the data. Just go into the directory where your configuration.yaml lives, cd into to .storage and edit core.config_entries where you search for your old WiFi address of the Goodwe and change it to the LAN IP address. Restart HA and your inverter is back in business.

[ivik]

I will try it out, not sure if there was a IP change problem, this happened when I setup a new integration using the IP I got from the LAN module. But I will try your solution later today and update the ticket if it works.

[ivik]

I just tried it out and it did not work. As soon as the LAN module is connected (updated IP in HA as you wrote and restarted HA) it cannot send anything to HA, nothing is recived. Even trying to reload the device in HA did not help or adding a new one using the LAN IP.

Instead SEMS Portal start working again which stops working when using the WIFI module (does not matter to me).

Not sure which LAN module you have, I have the new one, version 2 which is a LAN/Wifi module. But when using the module which only has Wifi then its works again with HA.

From what I understand this integration uses UDP modbus but the new LAN/Wifi module (version 2) seems to be using TCP modbus. But I could be wrong or perhaps that doesn't even matter?

[RalfWinter]

How did you configure the LAN/WiFi module?
I configured it via the SEMS portal app on the mobile phone. It is important to only configure the LAN-side, Wifi is not configured to connect to your home Wifi.

[ivik]

What do you mean with configure? I just insert LAN cable in to the module and use the LAN IP in HA.
I don't use the Wifi IP at all. I will look again when I get home later today, but pretty sure there was nothing to play around with when it comes to LAN. Are you sure you mean SEMS Portal app or do you mean the SolarGo app?

The SolarGo app had some settings for Wifi or LAN. I'm sure I have tried to shutdown wifi and only have settings for LAN but it did not help.

[RalfWinter]

You need to select LAN as the "Internet access port" within SEMS Portal WiFi-configuration (I know, "WIFI-configuration" is a bit misleading...). You may want to watch the Goodwe Configuration video of the Wii-Fi+LAN-kit on youtube
Good luck!

[savagejimmy85]

I am having what seems to be the exact same issue with my inverter - GW5000-DNS-30. Worked fine with the wifi module while I waited for the LAN/Wifi module to arrive.
Now that the LAN module is installed I am getting the same "Unknown error occurred" when re-adding the integration.
Running on VM HassOS

[savagejimmy85]

Looking into this further the only open port that I can find is TCP 502 with nmap. I no longer have the wifi only module to compare this to but I suspect @ivik has hit the nail on the head that its not using UDP anymore, just TCP

[savagejimmy85]

Apologies, I have found port 48899 open

[mletenay]

48899 is the "discovery" port of the module itself.
UDP/8899 is the port for the inverter (modbus) protocol.
TCP/502 is indeed the modbus/TCP, until now not used/supported by goodwe inverters.

It should not be a rocket science to add TCP support, but since I don't have such interface at hand, it might be a bit difficult to implement it in blind or over some mock ...

[mletenay]

What is exactly the LAN/WIFI module type/version ?
I have already collected few bucks on my Buy-me-a-coffee so I might have enough soon to buy that module myself, so I can add proper support for it ...