Platform: pi 3 model B+ rev.1.3 OS: Rasbian Node-RED: 1.0.5 Node.js: v12.17.0 problem node: node-red-contrib-dht-sensor v1.0.4 bcm2385 revision. a020d3 DHT22 sensor: AM2302 [image] Hello I'm new in using Nodered but I found it perfect for my home automation project. I bought 2 sensors DHT22…

Hello I bought and tested a new sensor DHT22 (a branded one) and now it works fine. So my problem was the sensor. I suggest to buy brended sensors and not generic unbrended sensors and of course to use the good node-red-contrib-dht-sensor. Thanks to gerry and zenofmud for your suggestions

I had the same thing happen when I switched from a dht11 to dht22. What finally fixed mine was changing the pin numbering from physical pins to bcm. Sounds dumb but it worked.

[image] gerry: Sounds dumb but it worked. Thanks gerry for your suggestion but in my case it doesn't work. I changed from Physical pins (rev.2) to BCM gpio [image] following my wiring connection [image] but I always received wrong values: {"_msgid":"e68c589b.d4d8f8","topic":"rpi-dht22_…

Just to verify, did you install the BCM2835 library and node-dht-sensor as it says in the pre-req's ?

No I didn't install the BMC libraries as told in the pre-req's. But I just do it and update the BMC to the version 1.65: [image] Then I followed the other 2 steps in pre-req's and I re-installed the node-dht-sensor dependency and the node-red-contrib-dht-sensor node. And I updated npm to the lat…

Are you sure you have the pins connected properly? Is it possible the dht22 pin outs on the board are different than the dht11?

After installing the BMC v1.65 library, node-dth-sensor and then the node-red-contrib-dht-sensor, I wired up a dht22 using: Pin 1 (3.3v) to pin 1 of the dht22 Pin 6 (Gnd) to pin 4 of the dht22 Pin 16 (BCM 23) to pin 2 of the dht22 and a 10K resistor between pins 1 and 2 of the dht22 the node is…

Just a note: Be careful with the resistor as many of the packaged DHT sensors have the resistor already in the circuit. I don't know if the DHT you are using has one or not but read the data sheet carefully.

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DHT22 AM2302 sensor doesn't work in nodered

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RPI4B vs DHT22 vs Node-Red General	5	648	29 August 2021
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DHT22 AM2302 sensor doesn't work in nodered

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