arduino煙霧傳感器程序 MQ2

ID:891089 · 發(fā)表于 2021-4-25 10:40

#include <Arduino.h>

#define Sensor A5
#define LED 13
#define Sensor_DO 2

unsigned int SensorValue = 0;

void setup()
{
pinMode(Sensor_DO,INPUT);
pinMode(Sensor,INPUT);
pinMode(LED,OUTPUT);
Serial.begin(9600); //設(shè)置通訊的波特率為9600
Serial.println("Welcome to use!");  //發(fā)送的內(nèi)容
Serial.println("Made by Beetle Electronic Technology!");  //發(fā)送的內(nèi)容
}

void loop()
{
SensorValue = analogRead(Sensor);       //讀取Sensor引腳的模擬值，該值大小0-1023
Serial.print("AD Value = ");
Serial.println(SensorValue);          //將模擬值輸出到串口
if( digitalRead(Sensor_DO) == LOW )       //當(dāng)DO引腳接收到低電平時候說明，模擬值超過比較器閥值
{                                     //通過調(diào)節(jié)傳感器上的電位器可以改變閥值
      Serial.println("Alarm!");       //報警
      digitalWrite(LED,HIGH);          //LED點亮
}
else
{
      digitalWrite(LED,LOW);          //LED熄滅
}
delay(1000);
}

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