#include <LiquidCrystal.h>

int measurePin = A0;
int ledPower = 7;

int samplingTime = 280;
int deltaTime = 40;
int sleepTime = 9680;
float voMeasured = 0.0;
float calcVoltage = 0.0;
float dustDensity =0.0;

const int rs = 12, en = 11, d4 = 5, d5 = 4, d6 = 3, d7 = 2;
LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(ledPower,OUTPUT);

   lcd.begin(16, 2);
  
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledPower,LOW);
  delayMicroseconds(samplingTime);
 
  voMeasured = analogRead(measurePin);

  delayMicroseconds(deltaTime);
  digitalWrite(ledPower, HIGH);
  delayMicroseconds(sleepTime);

  calcVoltage = voMeasured * (5.0/ 1024.0);

  dustDensity = 0.17 * calcVoltage ;
 
  Serial.print("Dust Density: ");
  Serial.print(dustDensity);
  delay(1000);
  lcd.setCursor(0,0);
  lcd.print("dust density");
  lcd.setCursor(0,1);
  lcd.print(dustDensity/1000);
}