#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Servo.h>
#define SCREEN_WIDTH 128 
#define SCREEN_HEIGHT 32 
#define OLED_RESET     4 

Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

Servo servo_ujicoba;
int data_servo = 0;
const int sensor_ldr = A2;
const int relay_1 = 8;
const int potensio = A0;
int data_potensio = 0;
int data_sensor_ldr = 0;


const int tombol_1 = 4;
const int tombol_2 = 3;
const int tombol_3 = 2;
const int buzzer = 5;

const int led_merah = 12;
const int led_kuning = 11;
const int led_hijau = 10;

byte timer_buzzer = 0;



void setup() {

   if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

  pinMode(sensor_ldr, INPUT);
  pinMode(relay_1, OUTPUT);
  pinMode(buzzer, OUTPUT);

  pinMode(tombol_1, INPUT_PULLUP);
  pinMode(tombol_2, INPUT_PULLUP);
  pinMode(tombol_3, INPUT_PULLUP);

  pinMode(led_merah, OUTPUT);
  pinMode(led_kuning, OUTPUT);
  pinMode(led_hijau, OUTPUT);
  pinMode(potensio, INPUT);  
  servo_ujicoba.attach(9);

}

void loop() {
  display.clearDisplay();
  display.setTextSize(1);             
  display.setTextColor(WHITE);        
  display.setCursor(0,0);   

  long nilai_rata_rata_ldr = 0;

  for(int i = 0; i<100; i++){
    nilai_rata_rata_ldr = nilai_rata_rata_ldr + analogRead(sensor_ldr);
  }
  nilai_rata_rata_ldr = nilai_rata_rata_ldr/100;

  data_sensor_ldr = nilai_rata_rata_ldr;


  if(data_sensor_ldr> 700){
    digitalWrite(relay_1, HIGH);
    digitalWrite(buzzer, HIGH);
  }
  else {
    digitalWrite(relay_1, LOW);
    digitalWrite(buzzer, LOW);
  }

  data_potensio =  analogRead(potensio);
  
  data_servo = map(data_potensio, 0, 1023, 0, 180);
  servo_ujicoba.write(data_servo);

  display.print("data_potensio: ");
  display.println(data_potensio);

  display.print("data_sensor_ldr: ");
  display.println(data_sensor_ldr);
  
  display.print("data_servo: ");
  display.println(data_servo);

  if(digitalRead(tombol_1)==LOW ){
    digitalWrite(buzzer, HIGH);
    delay(200);
    digitalWrite(buzzer, LOW);    
  }
  else{
    digitalWrite(buzzer, LOW);
  }



  display.display();
}