#include "DHT.h"
#include <LiquidCrystal_I2C.h>

#define DHTPIN 2
#define DHTTYPE DHT22
#define potentiometer_R A0

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27,16,2);
LiquidCrystal_I2C lcd_2(0x28,16,2);
LiquidCrystal_I2C lcd_3(0x29,16,2);



void setup() {
  // put your setup code here, to run once:
  //potentiometer_R
  pinMode(A0, INPUT);


  //lcd1602
  Serial.begin(9600);
  Serial.println(F("start"));
  dht.begin();
  // Init ICD1
  lcd.init();
  lcd.backlight();


 // Init ICD2
  lcd_2.init();
  lcd_2.backlight();
  

 // Init ICD3
  lcd_3.init();
  lcd_3.backlight();
 
  // light
  pinMode(4, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(13, OUTPUT);


}

void loop() {


  // put your main code here, to run repeatedly:
  // Wait a few seconds between measurements.
  delay(2000);
  // Reading temperature or humidity takes about 250 milliseconds!
  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
  float h = dht.readHumidity();
  // Read temperature as Celsius (the default)
  float t = dht.readTemperature();

  //Before reading, the lamp will light up yellow
  digitalWrite(4, HIGH);
  delay(275);
  digitalWrite(4, LOW);
  delay(200);

  // Print something Humidity
  lcd_3.setCursor(0,0);
  lcd_3.println("Humidity:");
  lcd_3.setCursor(0,1);
  lcd_3.println(h);

  // Print something Temperature
  lcd_2.setCursor(0,0);
  lcd_2.println("Temperature:");
  lcd_2.setCursor(0,1);
  lcd_2.println(t);
  
  int value = analogRead(A0);
  delay(100);
  // Print something potentiometer
  lcd.setCursor(0,0);
  lcd.println("potentiometer:");
  lcd.setCursor(0,1);
  lcd.println(value);

//Temperature lighting
  //The red light indicates that the temperature is higher than 26
  //The green light indicates that the temperature is moderate, between (20 to 26)
  //The white light indicates that the temperature is cold, below 20
 if(t>26)
 { 
  digitalWrite(7, HIGH);
  delay(275);
  digitalWrite(7, LOW);
  delay(200);
  }

  if(t>20 and t<60)
  {
  digitalWrite(8, HIGH);
  delay(275);
  digitalWrite(8, LOW);
  delay(200);
  }
  if(t<20)
  {
  digitalWrite(13, HIGH);
  delay(275);
  digitalWrite(13, LOW);
  delay(200);
  }

}