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View Code? Open in Web Editor NEWDHT22 for Raspberry Pi with WiringPi
DHT22 for Raspberry Pi with WiringPi
I found that with the original code at temperatures > 25.4 degrees celsius the temperature would print 0.0 and increase further from there. Eventually when the actual temperature drops below 25.4 again it would print the temperature as expected. Some research and comparisin with other C implementation suggest a different calculation of celsius.
Changed "celsius = data[3] / 10.0;" to "celsius = (((data[2] & 0x7F)*256) + data[3]) / 10.0;" from code of Juergen Wolf-Hofer
See also my pull-requests: https://github.com/danichoi737/DHT22/pull/2/commits
@ccoong7, finally I found a code that works with my DHT22.
I used to use the Adafruit python library but that needs to much resources on my ZeroW with RPi camera. Your code need almost no resources. Thumbs up!
I would like to make some suggestions:
return 0;
if a reading was succesful).I could fork and try to include my suggestions and issue a pull request. However I did not program in C for a long time....
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