#include <Adafruit_SSD1306.h>

#include <SoftwareSerial.h>

#define oledreset 4
Adafruit_SSD1306 display(oledreset);
const int button = 4;
const int pir = 3;
const int buzzer = 2;
SoftwareSerial MyBlue(2, 3);

int count = 0;
int Read=0;

void setup() {
  Serial.begin(9600);
  MyBlue.begin(9600);
  display.begin(SSD1306_SWITCHCAPVCC<0x3C);
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  pinMode(buzzer, OUTPUT);
  pinMode(pir, INPUT);
  pinMode(button, INPUT);
}

void loop() {
  delay(100);
  if (digitalRead(pir) == HIGH && digitalRead(button)==HIGH) {
    count++;
    delay(250);
  }
   Read=digitalRead(button);
    if (Read==1) {
      display.setCursor(0,0);
      digitalWrite(buzzer, HIGH);
      display.clearDisplay();
      display.println("Welcome!");
      display.display();
      delay(700);
      display.clearDisplay();
      display.setCursor(0,0);
      display.print(count);
      display.println(" people are waiting.");
      display.display();
      Read=0;
      delay(1000);
      display.clearDisplay();
      count = 0;
      Read=0;
    } else {
      display.setCursor(0,0);
      display.println("Ready to connect");
      display.display();
      display.println("Password 1234");
      display.display();
      delay(1000);
    display.clearDisplay();
    }
    display.display();
    delay(1000);
    display.clearDisplay();
    digitalWrite(buzzer, LOW);
    Read=0;
  }