#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#define bulb 19
#define pir 23
#define SCREEN_WIDTH 128 // OLED width,  in pixels
#define SCREEN_HEIGHT 64 // OLED height, in pixels
#define button 18
// create an OLED display object connected to I2C
Adafruit_SSD1306 oled(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);
 long t1, t2;

void setup() {
  Serial.begin(9600);
  pinMode(bulb, OUTPUT);
  pinMode(button, INPUT);
  pinMode(pir, INPUT);
  // initialize OLED display with I2C address 0x3C
  if (!oled.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("failed to start SSD1306 OLED"));
    while (1);
  }

  delay(2000);         // wait two seconds for initializing
  oled.clearDisplay(); // clear display

  oled.setTextSize(1);         // set text size
  oled.setTextColor(WHITE);    // set text color
  oled.setCursor(0, 2);       // set position to display (x,y)
  oled.println("Robotronix"); // set text
  oled.display();              // display on OLED
  t1=millis();
  digitalWrite(bulb, HIGH);
}

void loop() {
  t2=millis();
  long diff=t2-t1;
  int button_value=digitalRead(button);
  Serial.println(button_value);
  if (button_value==1)
   {
     digitalWrite(bulb, HIGH);
   }
  int pir_value=digitalRead(pir);
  if (diff>5000 && pir_value==0)
  {
    digitalWrite(bulb, LOW);
    t1=t2;
  }
  if (pir_value==1)
  {
    digitalWrite(bulb, HIGH);
  }
  if (pir_value==1)
  {
  oled.clearDisplay();
  oled.setCursor(0, 2);       // set position to display (x,y)
  oled.println("Motion Detected"); // set text
  oled.display();          
  }
  else{
  oled.clearDisplay();
  oled.setCursor(0, 2);       // set position to display (x,y)
  oled.println("No Motion"); // set text
  oled.display();   
  }
  delay(500);
}