I have several Sonoff S31 switches. I’m trying to flash the Tasmota firmware on them. I’ve followed information found on the web, but in spite of using several different USB-serial adapters I am never able to flash the new firmware. I’ve tried using PlatformIO as well as esptool. The flashing tool simply fails to connect with the S31. I hold the button down, plug in the adapter to the computer, continue to hold the button for a second or two, then release it and try to flash.
Can any kind soul who has flashed a S31 before lend me a hand? Thanks!