here it is a little hint to connect Sonoff Basic R2 (without spare GPIO's) to DHT 22 "the easy way"
1. I prepared hw by soldering 4 pins header on the board.
1. I flashed the last EspEasy, for 1 MB boards, with usb-to-serial adapter
2. I set up and DISABLE serial port
3. I connected DHT22 (see pics)
4. I used GPIO-3
5. Now, it's up-and-running since 3 days......
I hope it's useful to somebody.....
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