利用GP2Y1010AU0F偵測空氣懸浮微粒汙染PM2.5 (ESP8266- Test Board)

/*
 ESP8266 Read input from GPIO14, write to on-board LED
=================================================================
Connect the USB-TTL to pc and upload sketch to ESP-12
Note: GPIO0 should be LOW
      CH_PD and RST should be HIGH for first time flashing the board

GPIO0 should be LOW when uploading sketches
Remember use a 3.3V USB-TTL
connect RX of board to TX of usb and TX of board to RX
SKETCH:
edit auth code, ssid and pass
=================================================================
*/
int measurePin = A0; // ADC  Connect dust sensor to Arduino A0 pin
int ledPower = 14;   //Connect 3 led driver pins of dust sensor to Arduino D2

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

float voMeasured = 0;
float calcVoltage = 0;
float dustDensity = 0;

void setup(){
  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 - 5V mapped to 0 - 1023 integer values
  // recover voltage
  calcVoltage = voMeasured * (5.0 / 1024.0);

  // linear eqaution taken from http://www.howmuchsnow.com/arduino/airquality/
  // Chris Nafis (c) 2012
  dustDensity = 0.17 * calcVoltage - 0.1;

  Serial.print("Raw Signal Value (0-1023): ");
  Serial.print(voMeasured);

  Serial.print(" - Voltage: ");
  Serial.print(calcVoltage);

  Serial.print(" - Dust Density: ");
  Serial.print(dustDensity * 1000); // 這裡將數值呈現改成較常用的單位( ug/m3 )
  Serial.println(" ug/m3 ");
  delay(1000);
}