【Arduino基础教程】PM2.5粉尘检测传感器

示例程序

int dustPin=0;
float dustVal=0;
int ledPower=2;
int delayTime=280;
int delayTime2=40;
float offTime=9680;
void setup(){
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT);
  pinMode(dustPin, INPUT);
}
 
void loop(){
// ledPower is any digital pin on the arduino connected to Pin 3 on the sensor
  digitalWrite(ledPower,LOW); 
  delayMicroseconds(delayTime);
  dustVal=analogRead(dustPin); 
  delayMicroseconds(delayTime2);
  digitalWrite(ledPower,HIGH); 
  delayMicroseconds(offTime);
  delay(1000);
  if (dustVal>36.455)
    Serial.println((float(dustVal/1024)-0.0356)*120000*0.035);
}

附：测试得到的数据和空气质量对照：

3000 + = 很差
1050-3000 = 差
300-1050 = 一般
150-300 = 好
75-150 = 很好
0-75 = 非常好