Opentherm Gateway cannot connect

[umtauscher]

The problem

OTGW integration cannot connect to OTGW in relay server mode since 2023.6 It used to work until 7th June 2023

What version of Home Assistant Core has the issue?

2023.6

What was the last working version of Home Assistant Core?

2023.5

What type of installation are you running?

Home Assistant OS

Integration causing the issue

OTGW

Link to integration documentation on our website

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

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

The serial device on socket://192.168.1.50:7686 is not responding. Will keep trying.
20:03:56 – (FEHLER) runner.py - Die Nachricht ist zum ersten Mal am 9. Juni 2023 um 23:28:52 aufgetreten und erscheint 824 mal

Additional information

No response

[home-assistant[bot]]

Hey there @mvn23, mind taking a look at this issue as it has been labeled with an integration (opentherm_gw) you are listed as a code owner for? Thanks!

Code owner commands

Code owners of `opentherm_gw` can trigger bot actions by commenting: - `@home-assistant close` Closes the issue. - `@home-assistant rename Awesome new title` Renames the issue. - `@home-assistant reopen` Reopen the issue. - `@home-assistant unassign opentherm_gw` Removes the current integration label and assignees on the issue, add the integration domain after the command.

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[mvn23]

Looks like a network or gateway issue so far (gateway is not responding). Are you able to connect with otmonitor or telnet?

[umtauscher]

Opentherm Monitor is running just fine. That‘s where I enable the relay server. But I can‘t see any open connections there either.

[mvn23]

Ok, so is Home Assistant trying to connect to the OpenTherm Gateway or to otmonitor?

[umtauscher]

It‘s connecting to OTMonitor on Port 7686

The problem is solved. It was OTMonitor not being able to set it‘s operation mode (misc) It reset the otgw interface, OtMonitor switched to gateway operation and voilà HA could connect again. Thanks for trying to solve my problem Cheers