MQ-7 Gas Sensor
From James's Wiki
http://wiki.keyestudio.com/index.php/Ks0045_keyestudio_MQ-7_Carbon_Monoxide_Gas_Sensor
/*Arduino Sample Code * hookup up to analog 0 */ void setup() { Serial.begin(9600); //Set serial baud rate to 9600 bps } void loop() { int val; val=analogRead(0);//Read Gas value from analog 0 Serial.println(val,DEC);//Print the value to serial port delay(100); }C);//Print the value to serial port delay(100); }