MQ7 gas sensor

8eebe9c6 · DESKTOP-95L9KLS\Sandun · f8263ef9 · 8eebe9c6
Commit 8eebe9c6 authored Apr 27, 2022 by $DESKTOP-95L9KLS\Sandun's avatar$ DESKTOP-95L9KLS\Sandun
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IT18203172/MQ-7_Gas_Sensor/MQ-7_Gas_Sensor.ino IT18203172/MQ-7_Gas_Sensor/MQ-7_Gas_Sensor.ino +31 -0

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--- a/IT18203172/MQ-7_Gas_Sensor/MQ-7_Gas_Sensor.ino
+++ b/IT18203172/MQ-7_Gas_Sensor/MQ-7_Gas_Sensor.ino
+//Detect Carbon Monoxide
+
+void setup() {
+
+  pinMode(A0, INPUT);
+  pinMode(13, OUTPUT);
+  pinMode(12, OUTPUT);
+  Serial.begin(9600);
+}
+
+void loop() {
+
+ int sens = analogRead(A0);
+ if(sens >= 220){
+  digitalWrite(13, HIGH);
+  delay(500);
+  digitalWrite(13, LOW);
+  digitalWrite(12, HIGH);
+  delay(500);
+  digitalWrite(12, LOW);
+  digitalWrite(13, HIGH);
+  delay(500);
+  digitalWrite(13, LOW);
+  digitalWrite(12, HIGH);
+  delay(500);
+  digitalWrite(12, LOW);
+ }else{
+  digitalWrite(13, LOW);
+ }
+ Serial.println(sens);
+}