Environmental Parameter Monitoring System Based on NodeMCU ESP8266, MQTT and Node-RED

The proliferation of Internet of things (IoT) in smart environmental monitoring has become more popular. It comprises of communication protocols like MQTT and end sensor nodes to be able to connect to the internet. The central units of this system prototype comprised of the ESP8266 NodeMCU microcontroller board interfaced with DHT 22 and Raspberry Pi which housed the MQTT broker. Environmental parameters of air temperature, air humidity, were selected to represent the state of the environment through sensing and the sensor data was visulized on Node-Red Dashboard.