#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <Fonts/FreeSerif9pt7b.h>
#include <OneWire.h>
#include <DallasTemperature.h>

#define led_merah 5
#define led_kuning 4
#define led_biru 3
#define relay 2
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
OneWire oneWire(10);
DallasTemperature sensor(&oneWire);

void setup() {
  Serial.begin(115200);
  sensor.begin();
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
  display.clearDisplay();
  pinMode(led_merah, OUTPUT);
  pinMode(led_kuning, OUTPUT);
  pinMode(led_biru, OUTPUT);
  pinMode(relay, OUTPUT);
}

void loop() {
  delay(2000);
  display.setFont(&FreeSerif9pt7b);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0, 40);

  sensor.requestTemperatures();
  Serial.print("Temperature is: ");
  delay(10);
  Serial.println(sensor.getTempCByIndex(0));
  delay(1000);
  float suhu = sensor.getTempCByIndex(0);

  if (suhu < 10) {
    digitalWrite(led_merah, LOW);
    digitalWrite(led_kuning, LOW);
    digitalWrite(led_biru, HIGH);
    digitalWrite(relay, HIGH);
    display.println("SUHU RENDAH");
    display.display();
  } else if (suhu <= 10 && suhu >= 30) {
    digitalWrite(led_merah, LOW);
    digitalWrite(led_kuning, HIGH);
    digitalWrite(led_biru, LOW);
    digitalWrite(relay, LOW);
    display.println("SUHU CUKUP");
    display.display();
  } else if (suhu > 30) {
    digitalWrite(led_merah, HIGH);
    digitalWrite(led_kuning, LOW);
    digitalWrite(led_biru, LOW);
    digitalWrite(relay, LOW);
    display.println("SUHU PANAS");
    display.display();
  } else {
    digitalWrite(led_merah, LOW);
    digitalWrite(led_kuning, LOW);
    digitalWrite(led_biru, LOW);
        digitalWrite(relay, LOW);
    display.println("    ");
    display.display();
  }
}