Can't add ECU IP to Home Assistant

[phamaralbr]

Hello!

I am following your guide but can't add the device's IP to Home Assistant. I get the "Failed to connect" error.

I believe I have the right IP address because I did the "Test the ECU connection" part of the guide and got the expected response using port 8899. But i tested all the other ports listed on the image and all of them are closed.

Is there anything I need to do on the ECU to get these ports open? Or does my problem lie elsewhere?

I have an ECU-R 2160 connected via wifi. And HA installed on a Docker Container

[HAEdwin]

The integration works for your ECU type. If you are absolutely shure you have the right IP you should only use 8899. Restart the ECU, wait 10 minutes and then try again to connect to the ECU (you could start a ping {ip-address} -t to see if you indeed have the right node and it is the wireless module. Connected via ethernet does not work for the 2160.

[phamaralbr]

Thanks for the quick response!

Yeah, i'm sure now I have the right IP. I can ping 192.168.0.24 while the ECU is on, but if I power it off, the ping hangs. The device is also connected via wifi, not ethernet.

I also tried powering it off and then on again, waiting 10 minutes and then trying to add it to HA, but it still fails.

Should I provide a port here? Leaving it blank fails immediately, 8899 fails after a couple seconds.

The only part of your guide that doesn't seem to match for me is where you list all the ports the ECU uses and ask to make sure that they are accessible and not blocked.

This is what I get when I check these ports: Only 8899 is open.

❯ nmap -p 8995,8996,8997,8998,9001,9002,9003,9004,9220,9222,9227,9228,9219,21,8899 -sT 192.168.0.24

Starting Nmap 7.92 ( https://nmap.org ) at 2025-05-29 08:21 -03
Nmap scan report for 192.168.0.24
Host is up (0.028s latency).

PORT     STATE  SERVICE
21/tcp   closed ftp
8899/tcp open   ospf-lite
8995/tcp closed unknown
8996/tcp closed unknown
8997/tcp closed oracle-ms-ens
8998/tcp closed canto-roboflow
9001/tcp closed tor-orport
9002/tcp closed dynamid
9003/tcp closed unknown
9004/tcp closed unknown
9219/tcp closed unknown
9220/tcp closed unknown
9222/tcp closed teamcoherence
9227/tcp closed unknown
9228/tcp closed unknown

Nmap done: 1 IP address (1 host up) scanned in 1.56 seconds

Could this be the problem? Do you have any idea on how could I fix it?

[HAEdwin]

You've got the wrong integration, the one you now have is for the EZ1 series inverters. You should add the integration called "APsystems ECU Reader"

https://github.com/HAEdwin/homeassistant-apsystems_ecu_reader#installing-the-apsystems-ecu-reader-integration

[HAEdwin]

Btw the ports are only opened once every 5 minutes so a nmap does not show them as being opened (unless you're lucky)

[phamaralbr]

Thank you, that was it! Sorry for the dumb mistake, I didn't pay enough attention and selected the first APsystems integration that popped up.

Thanks again for your work and the quick response! I'll now try to put together all this solar info in a dashboard

[HAEdwin]

No problem, glad it works