Build Instructions

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  Run a Program

  #include <SPI.h>
  #include <Adafruit_GFX.h>
  #include <Adafruit_SSD1306.h>

  
  #define SCREEN_WIDTH 128 // OLED display width, in pixels
  #define SCREEN_HEIGHT 64 // OLED display height, in pixels
  
  // Declaration for SSD1306 display connected using software SPI (default case):
  #define OLED_MOSI 9
  #define OLED_CLK 10
  #define OLED_DC 11
  #define OLED_CS 12
  #define OLED_RESET 13
  
  Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT,
  OLED_MOSI, OLED_CLK, OLED_DC, OLED_RESET, OLED_CS);
  
  int measurePin = A5;
  int ledPower = 7;
  
  float voMeasured = 0;
  float calcVoltage = 0;
  float dustDensity = 0;
  
  void setup(){
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT);
  display.begin(SSD1306_SWITCHCAPVCC);
  display.clearDisplay();
  display.display();
  }
  
  void loop(){
  digitalWrite(ledPower,LOW);
  delayMicroseconds(280);
  
  voMeasured = analogRead(measurePin);
  
  delayMicroseconds(40);
  digitalWrite(ledPower,HIGH);
  delayMicroseconds(9680);
  
  calcVoltage = voMeasured*(5.0/1024);
  dustDensity = 0.17*calcVoltage-0.1;
  
  if ( dustDensity < 0)
  {
  dustDensity = 0.00;
  }
  
  Serial.println("Raw Signal Value (0-1023):");
  Serial.println(voMeasured);
  
  Serial.println("Voltage:");
  Serial.println(calcVoltage);
  
  Serial.println("Dust Density:");
  Serial.println(dustDensity);
  
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(85,22);
  display.println("Dust");
  display.setCursor(85,38);
  display.println("Density");
  display.setTextSize(3);
  display.setCursor(0,13);
  display.println(dustDensity);
  display.setCursor(6,43);
  display.setTextSize(2);
  display.println("ug/m3");
  display.display();
  display.clearDisplay();
  
  delay(1000);
  }

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