How to connect a DHT22
Important: This page is only applicable to STM32 based boards only.
Overview
From 3.4.1-RC1, DHT22 sensors can now be connected to RRF. The duet docs page for DHT22 sensors can be found here
What pin to choose?
A DHT22 sensor requires 3 pins to be connected. +3.3v (not 5v), ground and a signal pin.
Ideally a pin that does not have a bunch of signal conditioning or level shifting stuff connected to it should be chosen, for example, on the EXP1 or EXP2 header. It must also be interrupt capable.
How do you know what pin is interrupt capable?
Please see this page for more information.