ok, great, but if I connect dht22 to the 3,3V, GND and Rx, how to read the data from it?

can't find it now, but do you know or have some info where to find the GPIO description - which controls what?

ok, found one:
https://rutg3r.com/sonoff-firmware-tuto ... -esp-easy/
or this:
https://www.domoticz.com/forum/viewtopi ... 0&start=40

Hello, since I'm new int the board and in the automation do I want to say Hello to all of you. I have a problem with flashing the ESPEasy to the Sonoff basic - the new board (The one with the four pins 3,3V, TX, RX, GND). I've used the ESPEasy_mega-20191208 and loaded the firmware ESP_Easy_mega-2019...