Sharp PM2.5 Sensor

ต้องติดตั้ง
Lib ของDriver for the SSD1306 and SH1106 based 128x64 pixel OLED 


#include <SH1106Wire.h>
#include <OLEDDisplayFonts.h>

#include <OLEDDisplay.h>
#include <SSD1306.h>

#include <SSD1306Wire.h>
#include <OLEDDisplayUi.h>




//#include "SSD1306.h"
int measurePin = 2;
int ledPower = 17;

int samplingTime = 280;
int deltaTime = 40;
int sleepTime = 9680;

float voMeasured = 0;
float calcVoltage = 0;
float dustDensity = 0;
float tDust=0;
SSD1306  display(0x3c, 4, 15);
int loopAvr=5;
void setup(){
 pinMode(16,OUTPUT);
  digitalWrite(16, LOW);    // set GPIO16 low to reset OLED
  delay(50);
  digitalWrite(16, HIGH); // while OLED is running, must set GPIO16 in high
  display.init();

  display.flipScreenVertically();
  display.setFont(ArialMT_Plain_16);
  display.drawString(0,0,"Raw:");
  display.display();
  // for sensor
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT);
}

void loop(){
  digitalWrite(ledPower,LOW); // power on the LED
  delayMicroseconds(samplingTime);

  voMeasured = analogRead(measurePin); // read the dust value

  delayMicroseconds(deltaTime);
  digitalWrite(ledPower,HIGH); // turn the LED off
  delayMicroseconds(sleepTime);

  // 0 - 3.3V mapped to 0 - 1023 integer values
  // recover voltage
  calcVoltage = voMeasured * (3.3 / 1024);

  // linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
  // Chris Nafis (c) 2012
  dustDensity = 17.0 *( calcVoltage - 0.1);
 display.clear();
  Serial.print("Raw Signal Value (0-1023): ");
  Serial.print(voMeasured);
  String SerialData="";
SerialData = String(voMeasured,0);
 display.drawString(6,0,SerialData);
  Serial.print(" - Voltage: ");
  Serial.print(calcVoltage);
if(loopAvr==0)
{
 
  String DustData="";
  tDust+=dustDensity;
DustData = String(tDust/5.0,3);
tDust=0;
loopAvr=5;

  Serial.print(" - Dust Density: ");
  Serial.println(dustDensity);
  display.drawString(0,20,"PM2.5");
  display.drawString(50,20,DustData);

 display.display();
} else {
   tDust+=dustDensity; loopAvr--;
  }
  delay(1000);
}