DHT22 sensor not showing

[DigiH]

The library has had some updates since the OMG included version 1.4.2.; it’s now 1.4.4.
Although I cannot see any major changes, or changes which should be relevant for the problems you are seeing it might be worth you trying it out with the latest version, by changing line 122 in patformio.ini to

dht = DHT sensor library@1.4.4

I know I should have an old non-board DHT22 in one of my drawers somewhere - if I can find it I can also have a try with manually adding a 5k resistor to see what results I’m getting

Also going through the forum here there there seem to have been similar issues

Failed to read from DHT

Hi everyone, I just got back to OMG after a couple of years of not playing around with home automation. I got my old nodemcu, that was still all wired up, downloaded the current version and uploaded the sketch via the Arduino IDE. I started with a fresh install of the IDE and used all the libraries included in OMG. Everything compiles and uploads fine. Wiring is correct. However, I get the “E: Failed to read from DHT sensor!” error in the serial monitor. I tried using a different sketch and …

so whatever the older “real” DHT22s and new DHT22s are (no board/board with resistor??) there might be some library adjustment needed for some.

@christian-0s - any hints at what timing changes in the library got you proper readings from the ‘new’ DHT22s?

Thanks