Wow…even better. There is a fork of the 3ch relay, adapted to one relay, that I’m using on a different esp8266 board (I think it has 1MB flash, otherwise, the memory chip could be changed). How come you chose to maintain the older version? Was it for the extra 2 relays?
I’m using the 1 channel version with a remote sensor, and a few changes I did to the interface.
I’m not able at the moment to test your code but I’ll definitely do it as soon as possible (weeks).
At the end of this post [WiFi 1CH Relay - get temperature from 433Mhz remote node - #5 by fpaliuc] you can see the way the UI looks with my changes.