#include "DHT.h"
#include <HCSR04.h>
#include <LiquidCrystal_I2C.h>

LiquidCrystal_I2C lcd(0x27,20,4);  // set the LCD address to 0x27 for a 16 chars and 2 line display


#define DHTPIN 2     // Digital pin connected to the DHT sensor
UltraSonicDistanceSensor distanceSensor(13, 12);  // Initialize sensor that uses digital pins 13 and 12.


#define DHTTYPE DHT22   // DHT 22  (AM2302), AM2321
DHT dht(DHTPIN, DHTTYPE);

#define STEP_SIZE 5/1023


void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  Serial.begin(9600);  // We initialize serial connection so that we could print values from sensor.
  dht.begin();
  lcd.init();                      // initialize the lcd 
  // Print a message to the LCD.
  lcd.backlight();
  lcd.print("Setup Done!!");
  delay(500);
}

void loop() {
 

  // 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();
  // Read temperature as Fahrenheit (isFahrenheit = true)
  float f = dht.readTemperature(true);

  // Check if any reads failed and exit early (to try again).
  if (isnan(h) || isnan(t) || isnan(f)) {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  
  Serial.print(F("Humidity: "));
  Serial.print(h);
  Serial.print(F("%  Temperature: "));
  Serial.print(t);
  Serial.println(F("°C "));
  lcd.clear();
  lcd.print(F("Humidity:"));
  lcd.print(h);
  lcd.print(F("%")); 
  delay(500);
  lcd.setCursor(0,1);
  lcd.print("Temperature:");
  lcd.print(t);
  lcd.print(F("C"));
  delay(500);



  Serial.print("Distance: ");
  Serial.println(distanceSensor.measureDistanceCm());
  lcd.setCursor(0,2);
  lcd.print("Distance: ");
  lcd.print(distanceSensor.measureDistanceCm());
  delay(500);

  float ldr_relative = analogRead(A0);
  Serial.print("LDR Value: ");
  Serial.println(ldr_relative);
  lcd.setCursor(0,3);
  lcd.print("LDR Value: ");
  lcd.print(ldr_relative);
  delay(500);
  
  
  float pot_voltage = analogRead(A1);
  pot_voltage = pot_voltage * STEP_SIZE;
  Serial.print("POT Voltage: ");
  Serial.println(pot_voltage);
  lcd.setCursor(0,1);
  lcd.print("POT Voltage: ");
  lcd.print(pot_voltage);

  delay(500);
  
}