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 = 0;
#define DATALEN 7
LiquidCrystal_I2C lcd(0x3F,16,2);  // 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(115200);
  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 = 0;
  uint8_t i = 0;
  uint8_t mPkt[DATALEN] = {0};
  int mCheck = 0;
  while (Serial.available() > 0) 
  {  
    mData = Serial.read();     
    delay(2);//wait until packet is received
    if(mData == 0xAA)//head1 ok
     {
        mPkt[0] =  mData;
        mData = Serial.read();
        {
          for(int i=1;i < DATALEN;i++)//data recv and crc calc
          {
            mPkt[i] = Serial.read();
            Serial.print(mPkt[i],HEX);
           Serial.print("---");
             delay(2);
          }
          delay(1);
          Serial.println();
    //      Serial.println(mPkt[3]*256+mPkt[2]);
 //         Serial.print(mPkt[2]);
//          Serial.println("    ");
 //         Serial.print("---");
//          Serial.print(mPkt[5]);
          if(mPkt[DATALEN-1] == 0xFF)
          {
            pm25 = (mPkt[1]<<8)|mPkt[4];
             Serial.println(float(pm25/100));
             lcd.setCursor(0,1);
             lcd.print(float(pm25/100));
            Serial.flush();
            return;
          }
        }      
     }
   } 
}

void loop() {
  ProcessSerialData();
}