DHT22 Returning Nan

[jennaholland]

I am running the example code for the DHT22 on an arduino and it has stopped working. It was working continuously for about a month and then stopped outputting data. I have tried to upload the code on three different arduinos (2 Yuns and an Uno) and none of them work. Is the sensor broken?

[adafruit_support_carter]

It's possible something happened to it. What kind of operating conditions was it in for the month you were using it?

[brubell]

Do you have a pull-up resistor on the data line?

Try the arduino DHTstable library - https://github.com/RobTillaart/Arduino/ ... /DHTstable

[jennaholland]

It's possible something happened to it. What kind of operating conditions was it in for the month you were using it?

It was inside of a greenhouse

[jennaholland]

Do you have a pull-up resistor on the data line?

Try the arduino DHTstable library - https://github.com/RobTillaart/Arduino/ ... /DHTstable

yes, the sensor came with a resistor. And the DHTstable library is not compiling.

[adafruit_support_carter]

It does sound like the sensor is broken. Even though it says it's good up to 100% RH, maybe the greenhouse conditions were too wet for it. See Sec. 7, pg. 6-7 of the datasheet:
https://cdn-shop.adafruit.com/datasheets/DHT22.pdf
It mentions avoiding dew conditions - could that have happened in the greenhouse? Also, it suggest a possible recovery method for the sensor (item 3). Can you try that?