DHT22 Not Connecting Properly

[mgeiger]

Have seen this twice now.

7406-Traceback (most recent call last):
7407:  File "sensors.py", line 87, in <module>
7408-    main()
7409:  File "sensors.py", line 75, in main
7410-    total_humidity += humidity
7411-TypeError: unsupported operand type(s) for +=: 'float' and 'NoneType'

Looks like the DHT22 Sensor is failing at some point. Then when the code tries to access the DHT, we get a None returned.

• Should we reinitialize the DHT sensor?
• Perhaps we should add a hardware switch to the power input on the line that can physically reset the device.
• Is there a problem with the power input line? I am using the RPi 3.3V line, this might be the problem. There is a paralleled Cap (don't know value)