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How to connect MQ-135 gas sensor using arduino with coding

By Aman kumar
Sun, 24-Nov-2019, 09:29

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Arduino And MQ 135 Gas Sensor With Arduino Code

Arduino And MQ 135 Gas Sensor With Arduino Code © CC0

In this project, I have measured the components of air.

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COMPONENTS AND SUPPLIES

MQ 135 Gas Sensor
 × 1
A000066 iso both
Arduino UNO & Genuino UNO
 × 1

ABOUT THIS PROJECT

Video tutorial

CODE

Arduino CodeArduino 
#include 
int sensorValue;
const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
void setup(){  lcd.begin(16, 2);
Serial.begin(9600);                            // sets the serial port to 9600
 }
void loop(){sensorValue = analogRead(0);       // read analog input pin 0
Serial.print("AirQua=");
Serial.print(sensorValue, DEC);               // prints the value read
Serial.println(" PPM");
lcd.setCursor(0,0);
lcd.print("ArQ=");
lcd.print(sensorValue,DEC);
lcd.print(" PPM");
lcd.println("       "); 
lcd.print("  ");
delay(100);                                   // wait 100ms for next reading

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