/************************************************ 
TITLE: Temperature Monitoring System using ESP32 Microcontroller
SUBMITTED BY: PENTUAN, ALVIN
SUBMITTED TO: PROF. MICHAEL SAMONTE 
*************************************************/

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

#define DHTPIN 4
#define DHTTYPE DHT22

#define LED1 2
#define LED2 5
#define LED3 18
#define LED4 19
#define BUZZER 15

DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27, 16, 4);

void setup() {
  lcd.init();         // initialize the LCD
  lcd.backlight();     // turn on backlight
  dht.begin();         // initialize DHT22 sensor
  pinMode(LED1, OUTPUT);
  pinMode(LED2, OUTPUT);
  pinMode(LED3, OUTPUT);
  pinMode(LED4, OUTPUT);
  pinMode(BUZZER, OUTPUT);
}

void loop() {
  float temp = dht.readTemperature(); // read temperature data from DHT22
  float hum = dht.readHumidity();     // read humidity data from DHT22

  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temp);
  lcd.print(" C");

  if (temp < 28.0) {
    digitalWrite(LED1, HIGH);
    digitalWrite(LED2, HIGH);
    digitalWrite(LED3, LOW);
    digitalWrite(LED4, LOW);
    tone(BUZZER, 1000); // Start the buzzer at 1 kHz
  } 
  else {
    digitalWrite(LED1, LOW);
    digitalWrite(LED2, LOW);
    digitalWrite(LED3, HIGH);
    digitalWrite(LED4, HIGH);
    noTone(BUZZER); // Stop the buzzer
  }

  lcd.setCursor(0, 1);
  lcd.print("Humidity: ");
  lcd.print(hum);
  lcd.print(" %");
  lcd.setCursor(0, 2);
  lcd.print("Created By:");
  lcd.setCursor(0, 3);
  lcd.print("Alvin C. Pentuan");
}
esp:VIN
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esp:D14
esp:D27
esp:D26
esp:D25
esp:D33
esp:D32
esp:D35
esp:D34
esp:VN
esp:VP
esp:EN
esp:3V3
esp:GND.1
esp:D15
esp:D2
esp:D4
esp:RX2
esp:TX2
esp:D5
esp:D18
esp:D19
esp:D21
esp:RX0
esp:TX0
esp:D22
esp:D23
dht1:VCC
dht1:SDA
dht1:NC
dht1:GND
lcd1:GND
lcd1:VCC
lcd1:SDA
lcd1:SCL
bz1:1
bz1:2
led1:A
led1:C
led2:A
led2:C
r1:1
r1:2
led3:A
led3:C
led4:A
led4:C
r2:1
r2:2
r3:1
r3:2
r4:1
r4:2