This is a Node Red node to manage connection to a DHT11 or DHT22 sensor on a Raspberry Pi. It allows you to specify the variables that define the connections to the sensor. You can specify:

• The topic of the message (not really a lot of use!).
• The name of the node. This can be a unique value to tag the sensor, useful if you have multiple connected.
• The sensor type - this can be either DHT11 or DHT22.
• The pin number scheme. This can be any of
  • the BCM-GPIO scheme
  • the physical sequence number, for revision 1 of the Pi
  • the physical sequence number, for revision 2 of the Pi (and A+ or B+)
  • the wiringpi sequence, for revision 1 of the Pi
  • the wiringpi sequence, for revision 2 of the Pi (and A+ or B+)

This node is added to the Raspberry Pi section.

Note that this node requires that node-dht-sensor is installed and accessible from Node Red. Since this requires accesss to low-level parts of the Raspberry Pi, you must run your flow with superuser access.