Hello! Thanks so much for putting this together.
I have 4 of these bulbs, and tried to use your firmware. Everything uploads correctly. Home Assistant even discovers the bulb.
Problem is, it doesn't respond to any HA requests to turn on/off. When I click "on", nothing happens, the button goes back to off.
I've triple checked the code - still no dice.
Any help or more information you need, please let me know!