PM2.5源码

ID:279688 · 发表于 2018-2-6 17:13

#include <SoftwareSerial.h>
#include "U8glib.h"
U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_NONE);  // I2C / TWI
#define  mySerial Serial1
uint16_t pm25;
uint16_t pm10;
void pmRead() {
  uint8_t data[] = {0xAA, 0x02, 0x00, 0x00, 0x00, 0x00, 0x01, 0x67, 0xBB};
  mySerial.write(data, 9);
  delay(100);
  for (int i = 0; i < 9; i++) {
if (mySerial.available()) {
   data[i] = mySerial.read ();

}
  }
  if (data[0] == 0xAA && data[8] == 0xBB) {
pm25 = data[4] * 256 + data[5];
pm10 = data[2] * 256 + data[3];

  }
}

void pmOn() {

  uint8_t data[] = {0xAA, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x66, 0xBB};
  mySerial.write(data, 9);
  delay(1000);

}

void pmOff() {
  uint8_t data[] = {0xAA, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0x68, 0xBB};
  mySerial.write(data, 9);
}

void draw(void) {
  // graphic commands to redraw the complete screen should be placed here
  u8g.setFont(u8g_font_unifont);
  u8g.setPrintPos(0, 20);
  u8g.print("PM2.5 = ");
  u8g.print(pm25);

  u8g.setPrintPos(0, 60);
  u8g.print("PM10 = ");
  u8g.print(pm10);
}

void setup() {
  // put your setup code here, to run once:
  mySerial.begin(9600);
  Serial.begin(115200);
  pmOn();

delay(50);

}
void loop() {
  // put your main code here, to run repeatedly:
  pmRead();
  u8g.firstPage();
  do {
draw();
  } while ( u8g.nextPage() );
  delay(50);
}

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