I have a smart switch that came with TuyaMCU W3BS. I was planning to use TuyaConvert or do the serial Tasmota firmware but unfortunately this chip is not an ESP8266. Turns out the ESP12F has the same pinout, so I ordered this heat gun to remove and replace. circuit board. It was very beautiful. I installed a new chip and now the switch works as expected. I hope to work more with SMD in the next few months. I have a project but I haven't designed the board yet. I'll update this review if I encounter any issues, but I don't expect them.