标题: arduino空气质量检测 [打印本页]
作者: 怎末回事    时间: 2020-2-16 15:49
标题: arduino空气质量检测
本系统主要是通过arduino控制激光粉尘传感器来检测空气中的PM2.5及其他气体含量，并在lcd1602上显示出来。具体详细代码在压缩包。
  1. #include <Arduino.h>
  2. #include <LiquidCrystal.h>
  3. LiquidCrystal lcd( 7, 6, 5, 4, 3, 2);
  4. #define LENG 31   //0x42 + 31 bytes equal to 32 bytes
  5. unsigned char buf[LENG];

  7. int PM01Value=0;          //define PM1.0 value of the air detector module
  8. int PM2_5Value=0;         //define PM2.5 value of the air detector module
  9. int PM10Value=0;         //define PM10 value of the air detector module


  12. void setup()
  13. {
  14.   Serial.begin(9600);   //使用串口0
  15.   Serial.setTimeout(1500);    //设置超时时间为1500毫秒（大于传感器传送数据周期1秒）
  16.   
  17. // lcd.print("PM1.0: ");
  18. // lcd.print(PM01Value);
  19.   //lcd.println("  ug/m3");            
  20.      
  21.       
  22.       
  23. // lcd.print("PM1 0: ");  
  24.   //lcd.print(PM10Value);
  25.   //lcd.println("  ug/m3");   
  26.   //lcd.println();
  27. }

  29. void loop()
  30. {
  31.   if(Serial.find(0x42)){    //检测到0x42时，开始读取
  32.     Serial.readBytes(buf,LENG);

  34.     if(buf[0] == 0x4d)
  35.     {
  36.       if(checkValue(buf,LENG))
  37.       {
  38.         PM01Value=transmitPM01(buf); //count PM1.0 value of the air detector module
  39.         PM2_5Value=transmitPM2_5(buf);//count PM2.5 value of the air detector module
  40.         PM10Value=transmitPM10(buf); //count PM10 value of the air detector module
  41.       }           
  42.     }
  43.   }

  45.   static unsigned long OledTimer=millis();  
  46.     if (millis() - OledTimer >=1000)
  47.     {
  48.       OledTimer=millis();
  49.       
  50.       Serial.print("PM1.0: ");  
  51.       Serial.print(PM01Value);
  52.       Serial.println("  ug/m3");            
  53.      
  54.       Serial.print("PM2.5: ");  
  55.       Serial.print(PM2_5Value);
  56.       Serial.println("  ug/m3");     
  57.       
  58.       Serial.print("PM1 0: ");  
  59.       Serial.print(PM10Value);
  60.       Serial.println("  ug/m3");   
  61.       Serial.println();
  62.     }
  63.     lcd.begin(16, 2);
  64.     lcd.setCursor(0,0);
  65.     lcd.print("PM2.5:   ");  
  66.     lcd.print(PM2_5Value);
  67.     lcd.println("ug/m3 ");
  68.     lcd.setCursor(0,1);
  69.     lcd.print("PM10:   ");  
  70.     lcd.print(PM10Value);
  71.     lcd.println("ug/m3  ");   
  72.     lcd.println();
  73. }
  74. char checkValue(unsigned char *thebuf, char leng)
  75. {  
  76.   char receiveflag=0;
  77.   int receiveSum=0;

  79.   for(int i=0; i<(leng-2); i++){
  80.   receiveSum=receiveSum+thebuf[i];
  81.   }
  82.   receiveSum=receiveSum + 0x42;
  83.   
  84.   if(receiveSum == ((thebuf[leng-2]<<8)+thebuf[leng-1]))  //check the serial data
  85.   {
  86.     receiveSum = 0;
  87.     receiveflag = 1;
  88.   }
  89.   return receiveflag;
  90. }

  92. int transmitPM01(unsigned char *thebuf)
  93. {
  94.   int PM01Val;
  95.   PM01Val=((thebuf[3]<<8) + thebuf[4]); //count PM1.0 value of the air detector module
  96.   return PM01Val;
  97. }

  99. //transmit PM Value to PC
  100. int transmitPM2_5(unsigned char *thebuf)
  101. {
  102.   int PM2_5Val;
  103.   PM2_5Val=((thebuf[5]<<8) + thebuf[6]);//count PM2.5 value of the air detector module
  104.   return PM2_5Val;
  105.   }

  107. //transmit PM Value to PC
  108. int transmitPM10(unsigned char *thebuf)
  109. {
  110.   int PM10Val;
  111.   PM10Val=((thebuf[7]<<8) + thebuf[8]); //count PM10 value of the air detector module  
  112.   return PM10Val;
  113. }
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空气质量检测PM2.5.zip

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