// DS18B20 Temperature Sensor using ESP32
/*
i. -55 to 125
ii Uses 1 Wire Communication (1 data line (must be pulled HIGH) and 1 gnd wire)
iii. user configurable resolution between 9 to 12-bits
iv. 64-bit Serial Code whihc is unique to each sensor

GND, DQ (must be pulled HIGH), VDD
*/
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);
#include <DallasTemperature.h>
#include <OneWire.h>

int sensorPin = 5;
int ledMerah = 12;
int ledHijau = 14;

#define Buzzer 13

OneWire oneWire (sensorPin);  // creates the OneWire object using a specific pin
DallasTemperature sensor (&oneWire);

void setup() {
  // put your setup code here, to run once:
  Serial.begin (115200);
  lcd.init();
  lcd.backlight();
  sensor.begin ();

  pinMode(ledMerah, OUTPUT); //varibel ledMerah menjadi output
  pinMode(ledHijau, OUTPUT);

  pinMode(Buzzer, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  sensor.requestTemperatures ();
  int temp = sensor.getTempCByIndex (0);

  if (temp < 30) {
    digitalWrite(ledMerah, HIGH);
    digitalWrite(ledHijau, LOW);
    digitalWrite(Buzzer, HIGH);
  } else {
    digitalWrite(ledMerah, LOW);
    digitalWrite(ledHijau, HIGH);
    digitalWrite(Buzzer, LOW);
  }

  lcd.clear();
  lcd.setCursor(0,0);
  lcd.print ("Temp: ");
  lcd.print (temp);
  lcd.println (" ºC");
  delay (2000);
}