Now that mine is working I’m happy. Thinking back to what I actually did, I didn’t remove the temporary device I created so that I could compile the minimal firmware. I think this is where ESPHome/HA got confused, so my error.
I’ll be going through the process on another plug shortly.
Yep, I did the same. But I was still getting the error after entering the API encryption key. Using IP address, or FQDN, no difference. Mine was working, showing all the parameters. The problem was, it still wasn’t delivering power.
Anyways, here is what I got in the post earlier today (I ordered them for light switches and I forgot they can be used behind a power socket as well). And they have the advantage of being hidden behind the wall 
That sounds like the relay, not much you can do about that. Assuming it was a standard part, the plug doesn’t look like it’s meant for user maintenance!
