#include <DHT.h>
#include <LiquidCrystal.h>

#define pinDatos 18      // DHT22 data pin
#define pinPulsador 4    // On button
#define pinPulsador2 5   // Off button
#define pinLed 2         // On LED
#define pinLed2 15       // Off LED
#define pinLed3 23       // New LED
#define trigPin 34       // HC-SR04 Trigger pin
#define echoPin 35       // HC-SR04 Echo pin

LiquidCrystal lcd(22, 21, 13, 12, 14, 27); // LCD Pins

DHT sensorTH(pinDatos, DHT22); // DHT Sensor

void setup() {
  Serial.begin(115200);
  lcd.begin(16, 2); // Initialize the LCD

  sensorTH.begin(); // Initialize DHT sensor
  pinMode(pinPulsador, INPUT);
  pinMode(pinPulsador2, INPUT);
  pinMode(pinLed, OUTPUT);
  pinMode(pinLed2, OUTPUT);
  pinMode(pinLed3, OUTPUT);  // New LED

  // Initialize the HC-SR04
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);
}

void loop() {
  // Read the state of the buttons
  int pulsadorState = digitalRead(pinPulsador);
  int pulsador2State = digitalRead(pinPulsador2);

  lcd.setCursor(0, 0); // Set cursor position for LCD
  if (pulsadorState == HIGH) {
    digitalWrite(pinLed, HIGH); // Turn on the On LED
    digitalWrite(pinLed2, LOW); // Turn off the Off LED

    float humedad = sensorTH.readHumidity();
    float temperatura = sensorTH.readTemperature();

    lcd.print("Temp: ");
    lcd.print(temperatura);
    lcd.print("C");

    lcd.setCursor(0, 1);
    lcd.print("Humedad: ");
    lcd.print(humedad);
    lcd.print("%");

    if (temperatura <= 24.0) {
      digitalWrite(pinLed3, HIGH); // Turn on the new LED
    } else {
      digitalWrite(pinLed3, LOW); // Turn off the new LED
    }

    // Measure distance with the HC-SR04
    float distancia = medirDistancia();
    Serial.print("Distance = ");
    Serial.print(distancia);
    Serial.println(" cm");
  } else if (pulsador2State == HIGH) {
    Serial.print("System Off <3 ");
    digitalWrite(pinLed2, HIGH); // Turn on the Off LED
    digitalWrite(pinLed, LOW); // Turn off the On LED
     digitalWrite(pinLed3, LOW); // Turn off the new LED

    lcd.clear(); // Clear the LCD screen
  } else {
    // If neither button is pressed, turn off both LEDs
    digitalWrite(pinLed, LOW);
    digitalWrite(pinLed2, LOW);
     digitalWrite(pinLed3, LOW); // Turn off the new LED

    lcd.clear(); // Clear the LCD screen
  }
}

float medirDistancia() {
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  long tiempoEcho = pulseIn(echoPin, HIGH);
  float distancia = tiempoEcho / 58.2;

  return distancia;
}