Building a wireless sensor based on ESP8266 + DHT22 (+ "X-8266" board) + DHTtester example progam I fell on a rather strange and annoying problem :
When powering up the board it doesn't detect the DHT22, unplugging and replugging the VCC pin of the DHT22 solves it.
My 2 cent :
Do you have any clue on this behavior and, better, a solution ? I could bind the VCC pin to a free GPIO and use it as a 3.3V power source but this wouldn't be very practical ...
PS. I have several DHT22 and the problem is the same for all. Hence I don't think this is linked to the DHT22 by itself, yet I might be wrong as they are all from the same batch