I have the Insteon integration connected to a PowerLinc Serial Modem attached via USB with this and have added an On/Off Module. Using the Home Assistant interface, I can control the module on and off. I can see it happen in real life, and the events get added to the logbook.
However, when I physically control the module on or off via the buttons, the events don’t find their way back into Home Assistant. This is a one-direction relationship, where Home Assistant can only control Insteon devices, but cannot listen events it didn’t initiate. Any ideas what’s happening or how I can debug?