Arduino-汉王PM2.5检测模组B1

汉王PM2.5检测模组B1，接入Arduino，使用I2C1602显示屏显示

 #include <Arduino.h>
 #include <Wire.h>
 #include <LiquidCrystal_I2C.h>
 float pm25 = ;
 #define DATALEN 7
 LiquidCrystal_I2C lcd(0x3F,,);  // set the LCD address to 0x27 for a 16 chars and 2 line display
 void setup() {
   // put your setup code here, to run once:
   Serial.begin();
   lcd.init();                      // initialize the lcd

   // Print a message to the LCD.
   lcd.backlight();
   lcd.print("PM2.5");

 }
 void ProcessSerialData()//读取PM2.5的数据。
 {
   uint8_t mData = ;
   uint8_t i = ;
   uint8_t mPkt[DATALEN] = {};
   int mCheck = ;
   while (Serial.available() > )
   {
     mData = Serial.read();
     delay();//wait until packet is received
     if(mData == 0xAA)//head1 ok
      {
         mPkt[] =  mData;
         mData = Serial.read();
         {
           for(int i=;i < DATALEN;i++)//data recv and crc calc
           {
             mPkt[i] = Serial.read();
             Serial.print(mPkt[i],HEX);
            Serial.print("---");
              delay();
           }
           delay();
           Serial.println();
     //      Serial.println(mPkt[3]*256+mPkt[2]);
  //         Serial.print(mPkt[2]);
 //          Serial.println("    ");
  //         Serial.print("---");
 //          Serial.print(mPkt[5]);
           if(mPkt[DATALEN-] == 0xFF)
           {
             pm25 = (mPkt[]<<)|mPkt[];
              Serial.println(float(pm25/));
              lcd.setCursor(,);
              lcd.print(float(pm25/));
             Serial.flush();
             return;
           }
         }
      }
    }
 }

 void loop() {
   ProcessSerialData();
 }