Module 21 // Environmental Monitoring

Air Quality Node

Integrates MQ-series gas telemetry logic gates to trigger hazard alerts when airborne contamination matrix values narrow down. The system monitors smoke, LPG and harmful gas concentrations in real time.

Gas Sensor Mapping

Sensor Logic Pin	Vector Mapping	Target Uno Pin
MQ2 Analog Output	====>	Analog Pin A0
Warning Buzzer	====>	Digital Pin 8
Danger LED	====>	Digital Pin 13

Air Monitoring Firmware


const int gasSensor=A0;
const int buzzer=8;
const int led=13;

void setup()
{
Serial.begin(9600);

pinMode(buzzer,OUTPUT);
pinMode(led,OUTPUT);
}

void loop()
{
int gasValue=
analogRead(gasSensor);

Serial.print("Gas Level: ");
Serial.println(gasValue);

if(gasValue>500)
{
digitalWrite(led,HIGH);
tone(buzzer,1200);
}
else
{
digitalWrite(led,LOW);
noTone(buzzer);
}

delay(300);
}