IoT Based Air Pollution Monitoring using NodeMCU and MQ135 Sensor
There are different types of gas sensors to detect different gases. Here in this project we are going to use MQ135 gas sensor to sense the pollution content in the surrounding area and then to monitor these values over the Webpage. The circuit consists of a simple connection and takes fewer components to have your own IoT based air pollution monitoring system. In this project, at first, we will be knowing about the MQ135 sensor and its internal circuit. Later we will be building an air pollution monitoring system using nodeMCU and MQ 135 gas sensor and interface an LCD (16X2) display to nodeMCU, to show the pollution content value. Later on, we will connect the nodeMCU to our LAN, by providing the SSID and password credentials and then we will be generating a webpage where we send the sensor data. The page will be refreshed for every time interval to show the updated values.
COMPONENTS REQUIRED
MQ135 gas sensor
NodeMCU
LCD (16X2)
Breadboard
Connecting Wires
View the full tutorial
