A simple node-red flow showing DHT22->Pi->Azure IoT Central

node-red-iot-central.json

[{"id":"9e47273a.f12738", "type":"tab", "label":"DHT22-IoTC",  "disabled":false,  "info":""},  {"id":"b3d8f5b6.a243b8", "type":"debug", "z":"9e47273a.f12738", "name":"Hub Response",  "active":true, "tosidebar":true, "console":false,  "tostatus":false, "complete":"true", "x":740,  "y":340, "wires":[]}, {"id":"117b0c09.6b3a04", "type":"azureiothub", "z":"9e47273a.f12738", "name":"Azure IoT Hub", "protocol":"mqtt", "x":520, "y":340,  "wires":[["b3d8f5b6.a243b8"]]}, {"id":"ee333823.1d33a8", "type":"inject", "z":"9e47273a.f12738", "name":"", "topic":"", "payload":"", "payloadType":"date", "repeat":"60", "crontab":"", "once":false, "onceDelay":"", "x":210, "y":120, "wires":[["38f14b0d.96eb14"]]}, {"id":"38f14b0d.96eb14", "type":"rpi-dht22", "z":"9e47273a.f12738", "name":"", "topic":"rpi-dht22", "dht":22, "pintype":"0", "pin":4, "x":400, "y":120, "wires":[["f0bfed44.e988b"]]}, {"id":"f0bfed44.e988b", "type":"change", "z":"9e47273a.f12738", "name":"", "rules":[{"t":"set", "p":"payload", "pt":"msg", "to":"{\t   \"deviceId\":\"{YOUR DEVICE ID} \", \t   \"key\":\"{YOUR KEY}\", \t   \"protocol\":\"mqtt\", \t   \"data\": {\t       \"temp\": $number(payload), \t       \"humidity\": $number(humidity)\t   \t   }\t\t}", "tot":"jsonata"}], "action":"", "property":"", "from":"", "to":"", "reg":false, "x":280, "y":340, "wires":[["117b0c09.6b3a04", "db5b70be.81e2a"]]}, {"id":"db5b70be.81e2a", "type":"debug", "z":"9e47273a.f12738", "name":"Payload", "active":true, "tosidebar":true, "console":false, "tostatus":false, "complete":"payload", "x":500, "y":420, "wires":[]}]