If you don’t want to buy/order a ‘special’ pcb, it can be done with off-the-shelf parts as well:
M5stamp + Dc-Dc 5V output + Levelshifter 5V-3V3 + a little soldering and heat shrink tubing.
Configure ESPHome with pins: RX 32 and TX 33 and S21 2 green - 3 yellow - 4 red - 5 black
I am trying figure out if I could get Faikin working on this setup with a non-standard pinout.
Other direction that can also go ‘real Faikin’ software:
