FEIT dimmers
Martin Jerry S-01 switches
2021-11-18 I have one converted to ESPHome and installed (laundry room). Three more to go.
I soldered a header onto the back of each controller at the pads marked CN-1 and used Dupont wires to connect it to the programmer (which is just a 3V3 UART-USB really.) The Espressif Programmer was not pulling GPIO0 down so I had to unhook that wire and manually ground the input.
Feit Electrics dimmers
These are a good price but I'm disappointed that I will have to remove the CPU from the board to reflash them.
https://community.smartthings.com/t/costco-cheap-feit-smart-dimmer-wifi/208142
https://community.home-assistant.io/t/costco-feit-smart-dimmer-tuya-convert-tasmota/151390/5
Deployed in bathroom, kitchen island, breakfast area, living room, dining room. I just replace one in guest bathroom with a Maestro motion sensor switch, so now it's a spare.
I am going to pull apart the spare to see if I can flash it.
Tasmota - https://github.com/blakadder/templates/issues/402 says it's unstable.
https://github.com/nuttytree/ESPHome-Devices https://github.com/cbpowell/ESPSense/wiki