Commit 19a4ab25 authored by Cristiano Krug's avatar Cristiano Krug
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parent d65beb9f
/* MQ-8 Hydrogen Gas Sensor Circuit with Arduino */
const int AOUTpin=0;//the AOUT pin of the hydrogen sensor goes into analog pin A0 of the arduino
const int DOUTpin=3;//the DOUT pin of the hydrogen sensor goes into digital pin D3 of the arduino
//const int ledPin=5;//the anode of the LED connects to digital pin D5 of the arduino
int limit;
int value;
void setup() {
Serial.begin(9600);//sets the baud rate
pinMode(DOUTpin, INPUT);//sets the pin as an input to the arduino
//pinMode(ledPin, OUTPUT);//sets the pin as an output of the arduino
void loop()
value= analogRead(AOUTpin);//reads the analog value from the hydrogen sensor's AOUT pin
limit= digitalRead(DOUTpin);//reads the digital value from the hydrogen sensor's DOUT pin
//Serial.print("Hydrogen value: ");
Serial.println(value);//prints the hydrogen value
//Serial.print("Limit: ");
//Serial.print(limit);//prints the limit reached as either LOW or HIGH (above or underneath)
//if (limit == HIGH){
//digitalWrite(ledPin, LOW);//if limit has been reached, LED turns on as status indicator
//digitalWrite(ledPin, HIGH);//if threshold not reached, LED remains off
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