MQ-5 Smoke Gas Module Features
MQ series sensor uses a small heater inside with an electrochemical sensor in order to measure a different kinds of gas combinations. This MQ-5 gas detector is used for leak detection of LPG (Liquified Petroleum Gas), natural gas and city gas. It has low sensitivity to alcohol and smoke.
Note
After turning on the module, wait 2 minutes for the internal heater to warmp up.
You can download the datasheet of this module here.
MQ-5 Smoke Gas Module Pinout
This sensor has 4 pins:
- 5V: Module power supply – 5 V
- GND: Ground
- DOUT: Digital output
- AOUT: analog output
You can see pinout of this module in the image below.
Required Materials
Hardware Components
Software Apps
Interfacing MQ-5 Gas Sensor with Arduino
Step 1: Circuit
The following circuit shows how you should connect Arduino to MQ-5 module. Connect wires accordingly.
Step 2: Code
Upload the following code to your Arduino.
/*
modified on Sep 28, 2020
Modified by MohammedDamirchi from Arduino Examples
Home
*/
// the setup routine runs once when you press reset:
void setup() {
// initialize serial communication at 9600 bits per second:
Serial.begin(9600);
}
// the loop routine runs over and over again forever:
void loop() {
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
// print out the value you read:
Serial.println(sensorValue);
delay(20);
}
After uploading the code, you can see the output in the serial monitor.
