0

I am using the program from Adafruit's Circuit Python to read the values from DHT22/AM2302 sensor.

At the start of the program, I often get the exception

A full buffer was not returned.  Try again.

and when reading the values every 10 sec a typical output looks like

Temp: 69.8 F / 21.0 C    Humidity: 45.9% 
Temp: 69.8 F / 21.0 C    Humidity: 46.0% 
Checksum did not validate. Try again.
Temp: 69.8 F / 21.0 C    Humidity: 46.1% 
Checksum did not validate. Try again.
Temp: 69.8 F / 21.0 C    Humidity: 46.1% 
Temp: 69.8 F / 21.0 C    Humidity: 47.7% 
Checksum did not validate. Try again.
Checksum did not validate. Try again.
Temp: 69.8 F / 21.0 C    Humidity: 46.2%

Q Is this the typical behavior of the sensor or is my sensor malfunctioning?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.