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NodeMCU V3 - Link: NodeMCU V3
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DHT22 Sensor AM2302 - Link: DHT22 Sensor
This Sensor no need 1KOhm Resistor because is already installed on board
- https://www.arduino.cc/en/main/software
- https://github.com/adafruit/DHT-sensor-library
- https://github.com/knolleary/pubsubclient
char* topic = "dht22";
char* server = "148.251.206.53";
char* hellotopic = "hello_topic";
You can change this setting in the Arduino Sketch with your parameters of MQTT-Server and Topic.
Have a look at this Article to find out your proper MQTT-Server Public MQTT-Server List