2-2 G5T 基礎使用

附 A： PMS5003T 主動式傳輸協議
默認串列傳輸速率： 9600bps 校驗位：無 停止位： 1 位
協議總長度： 32 位元組

注：標準顆粒物質量濃度值是指用工業金屬顆粒物作為等效顆粒進行密度換算得到的品質濃度值，適用於工業生產車間等環境。大氣環境顆粒物質量濃度值以空氣中主要污染物為等效顆粒進行密度換算，適用于普通室內外大氣環境。

#include <SoftwareSerial.h>
SoftwareSerial PmsSerial(2, 3); // RX, TX

static unsigned int pm_cf_10;           //定義全域變數
static unsigned int pm_cf_25;
static unsigned int pm_cf_100;
static unsigned int pm_at_10;
static unsigned int pm_at_25;
static unsigned int pm_at_100;
static unsigned int particulate03;
static unsigned int particulate05;
static unsigned int particulate10;
static unsigned int particulate25;
static float sencorT;
static float sencorH;

void getG5(unsigned char ucData)//獲取G5的值
{
  static unsigned int ucRxBuffer[250];
  static unsigned int ucRxCnt = 0;
  ucRxBuffer[ucRxCnt++] = ucData;
  if (ucRxBuffer[0] != 0x42 && ucRxBuffer[1] != 0x4D)//資料頭判斷
  {
    ucRxCnt = 0;
    return;
  }
  if (ucRxCnt > 32)//資料位元數判斷//G5T為32
  {
       pm_cf_10=(int)ucRxBuffer[4] * 256 + (int)ucRxBuffer[5];      //大氣環境下PM2.5濃度計算        
       pm_cf_25=(int)ucRxBuffer[6] * 256 + (int)ucRxBuffer[7];
       pm_cf_100=(int)ucRxBuffer[8] * 256 + (int)ucRxBuffer[9];
       pm_at_10=(int)ucRxBuffer[10] * 256 + (int)ucRxBuffer[11];               
       pm_at_25=(int)ucRxBuffer[12] * 256 + (int)ucRxBuffer[13];
       pm_at_100=(int)ucRxBuffer[14] * 256 + (int)ucRxBuffer[15];
       particulate03=(int)ucRxBuffer[16] * 256 + (int)ucRxBuffer[17];
       particulate05=(int)ucRxBuffer[18] * 256 + (int)ucRxBuffer[19];
       particulate10=(int)ucRxBuffer[20] * 256 + (int)ucRxBuffer[21];
       particulate25=(int)ucRxBuffer[22] * 256 + (int)ucRxBuffer[23];
       sencorT=((int)ucRxBuffer[24] * 256 + (int)ucRxBuffer[25])/10;
       sencorH=((int)ucRxBuffer[26] * 256 + (int)ucRxBuffer[27])/10; 
      
       
    if (pm_cf_25 >  999)//如果PM2.5數值>1000，返回重新計算
    {
      ucRxCnt = 0;
      return;
    }
    
    ucRxCnt = 0;
    return;
  }

}

void setup() {
   PmsSerial.begin(9600);
   PmsSerial.setTimeout(1500);
   Serial.begin(9600);
   Serial.print("PM_CF1.0");Serial.print(",");
   Serial.print("PM_CF2.5");Serial.print(",");
   Serial.print("PM_CF10");Serial.print(",");
   Serial.print("PM_AQI1.0");Serial.print(",");
   Serial.print("PM_AQI2.5");Serial.print(",");
   Serial.print("PM_AQI10");Serial.print(",");
   Serial.print("PM_count03");Serial.print(",");
   Serial.print("PM_count05");Serial.print(",");
   Serial.print("PM_count10");Serial.print(",");
   Serial.print("PM_count25");Serial.print(",");
   Serial.print("Temperature");Serial.print(",");
   Serial.println("Humandity");
   
   Serial.print("(ug/m3)");Serial.print(",");
   Serial.print("(ug/m3)");Serial.print(",");
   Serial.print("(ug/m3)");Serial.print(",");
   Serial.print("(ug/m3)");Serial.print(",");
   Serial.print("(ug/m3)");Serial.print(",");
   Serial.print("(ug/m3)");Serial.print(",");
   Serial.print("(pcs/0.01cf)");Serial.print(",");
   Serial.print("(pcs/0.01cf)");Serial.print(",");
   Serial.print("(pcs/0.01cf)");Serial.print(",");
   Serial.print("(pcs/0.01cf)");Serial.print(",");
   Serial.print("(C)");Serial.print(",");
   Serial.println("(%)");
}

void loop() {
  while (PmsSerial.available()) {
    getG5(PmsSerial.read());
  }
  Serial.print(pm_cf_10);Serial.print(",");
  Serial.print(pm_cf_25);Serial.print(",");
  Serial.print(pm_cf_100);Serial.print(",");
  Serial.print(pm_at_10);Serial.print(",");
  Serial.print(pm_at_25);Serial.print(",");
  Serial.print(pm_at_100);Serial.print(",");
  Serial.print(particulate03);Serial.print(",");
  Serial.print(particulate05);Serial.print(",");
  Serial.print(particulate10);Serial.print(",");
  Serial.print(particulate25);Serial.print(",");
  Serial.print(sencorT);Serial.print(",");
  Serial.println(sencorH);

  delay(2000);
}