Alternative firmware for LC-Tech 2-channel relay modules See: https://cmheong.blogspot.com/2020/07/flashed-before-my-eyes-flashing.html Precompiled 2relay.ihx is also placed in this repo for your convenience. Many thanks to original author nekromant
Alternative firmware for LC-Tech 4-channel relay modules See: https://github.com/nekromant/esphome-lctech-4chanel-modules
Can be compiled with platform.io.
Precompiled firmware.hex is also placed in this repo for your convenience.