POLLUTION MONITORING SYSTEM

The proposed system has various parameters such as Air Quality, Temperature and Humidity sensors with an Arduino module having Atmel ATmega328P and ATmega16U2 microcontrollers.

MQ135 Gas sensor

Analog out connect to A0 in arduino

DHT11 temperature sensor

Analog out connect to A1 in arduino

RG1602A(2x16 lcd display) is used for display

Vss-GND
Vdd-5V(power)
Vo-3.3k resistor then GND
RS-13(digital PWM arduino)
RW-12(digital PWM arduino)
E-11(digital PWM arduino)
D0-10(digital PWM arduino)
D1-9(digital PWM arduino)
D2-8(digital PWM arduino)
D3-7(digital PWM arduino)
D4-6(digital PWM arduino)
D5-5(digital PWM arduino)
D6-4(digital PWM arduino)
D7-3(digital PWM arduino)
A-5V(high)
K-GND

Dont forget to include DHT11 and MQ135 sensor libraries in Arduino IDE