I finally managed to get a properly smart kettle integrated into my home automation system using a Xiao module. Through several early kludges, one electrocution, and 13 years of questing, this year I got around to making a PCB to put a Xiao ESP32-C3 inside a kettle base.
You can see my whole journey from the start or skip to part 3 where I install the Xiao solution!
Thanks for such a versatile and compact little module!
WOW thanks for sharing!
Hi there,
LOL, I LOVE it… not the Electrocution part though 
but way to learn and discover . The PCB is Great ! Clean and straight forward.
Really good Job. and Great contribution. 
The Zwave , Zigbee conundrum in Black and White, The prices and support as you point out very well. I think the C5 may be the winner in the END
GL 
PJ 
Great Write up, Everyone should go look at it.
" OK Nabu, boil the kettle."
I always say elecrocution instead of shock… but i think you only get elecrocuted once, shocked many times.. lol It was interesting the first time i felt 60 hz in my fillings…
Nice build. The custom PCB integration looks clean. I went through your schematic as well. A couple of things stood out.
The control side and power stage share the same path. There’s no real isolation between them. That can let switching noise couple into the ESP32. Over time, that may cause instability or random resets. Using something like a PC817 optocoupler in the control path would help. It gives proper isolation and improves robustness: PC817 Galaxy Price | Stock | Datasheet - Unikeyic
The power stage needs some improvement. The voltage drop before regulation may affect stability under load. That can affect the 5V and 3.3V rails under load. I’d also review decoupling, since several capacitor values are not defined. Better filtering and a more stable rail would make the system more reliable long term.
