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	- Project: Temperature Monitor
	- Source Code compiled for: Arduino Uno
	- Source Code created on: 2023-12-29 00:33:51

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
	/* Leer la temperatura y la humedad y escribirla en */
	/* el display LCD cada 1s. Si la temperatura supera */
	/* los 40°C entonces encienda el zumbador, si no */
	/* apague el zumbador. */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Arduino.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <DHT.h>

/****** FUNCTION PROTOTYPES *****/
void setup();
void loop();

/***** DEFINITION OF DIGITAL INPUT PINS *****/
const uint8_t DHTPIN = 3;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t BUZZERPIN = 4;

/***** DEFINITION OF I2C PINS *****/
const uint8_t I2C_PIN_SDA = A4;
const uint8_t I2C_PIN_SCL = A5;
const uint8_t I2C_SLAVE_ADDRESS = 39;

/****** DEFINITION OF LIBRARY CLASS INSTANCES *****/
DHT dht(DHTPIN, DHT11);
LiquidCrystal_I2C lcd(I2C_SLAVE_ADDRESS, 16, 2);

void setup()
{
  pinMode(DHTPIN, INPUT_PULLUP);
  pinMode(BUZZERPIN, OUTPUT);

  dht.begin();

  lcd.begin(16, 2);
  lcd.backlight();
}

void loop()
{
  float humidity = dht.readHumidity();
  float temperature = dht.readTemperature();

  if (isnan(humidity) || isnan(temperature))
  {
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C");
  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(humidity);
  lcd.print("%");

  if (temperature > 40)
  {
    digitalWrite(BUZZERPIN, HIGH);
  }
  else
  {
    digitalWrite(BUZZERPIN, LOW);
  }

  delay(1000);
}