#include <Wire.h>
#include <LCD.h>
#include <LiquidCrystal_I2C.h>
#define CAYENNE_PRINT Serial  // Comment this out to disable prints and save space
#include <CayenneEthernet.h>

LiquidCrystal_I2C  lcd(0x27,2,1,0,4,5,6,7); // 0x27 is the I2C bus address for an unmodified module

// Cayenne authentication token. This should be obtained from the Cayenne Dashboard.
char token[] = "token";


int measuringPin = A0;
int ledPin = 2;


const int timeMeasuring = 280;
const int timeStabilization = 40;
const int timeSleep = 9680;


float voltageAnalog = 0;
float voltageConversion = 0;
float dustiness = 0;

void setup() {
  Serial.begin(9600);
  pinMode(ledPin,OUTPUT);
  Cayenne.begin(token);
  lcd.setBacklightPin(3,POSITIVE);
  lcd.setBacklight(HIGH); // NOTE: You can turn the backlight off by setting it to LOW instead of HIGH
  lcd.begin(16, 2);
  lcd.clear();
}
  
void loop() {
  Cayenne.run();
  
  digitalWrite(ledPin,LOW);
  delayMicroseconds(timeMeasuring);
  voltageAnalog = analogRead(measuringPin);
  delayMicroseconds(timeStabilization);
  digitalWrite(ledPin,HIGH);
  delayMicroseconds(timeSleep);
  
  voltageConversion = voltageAnalog * (4.6 / 1024.0);
  dustiness = (0.17 * voltageConversion - 0.1)*1000;
  
  Serial.print("Dust concentration: ");
  Serial.print(dustiness);
  Serial.println(" ug/m3");
  delay(500);
  
  lcd.setCursor(0,0);
  lcd.print("Dust value:");
  lcd.setCursor(0,1);
  lcd.println(dustiness);
  lcd.setCursor(11,1);
  lcd.print("ug/m3");
 
  
  
}

CAYENNE_OUT(V0)
{
  Cayenne.virtualWrite(V0, dustiness);
}