// Servo Sweep example for the ESP32
// https://wokwi.com/arduino/projects/323706614646309460

#include <ESP32Servo.h>

const int buttonPin = 2;        // Push button pin
const int pirSensorPin = 13;     // PIR sensor output pin
const int servoPin = 18;         // Servo control pin

Servo gateServo;                // Servo object for controlling the gate
bool gateOpen = false;          // Flag to indicate if the gate is open

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(pirSensorPin, INPUT);
  
  gateServo.attach(servoPin);
  gateServo.write(0);  // Initialize the gate in the closed position

  Serial.begin(9600);  // Initialize serial communication
}

void loop() {
  // Check if the button is pressed to open the gate
  if (digitalRead(buttonPin) == LOW && !gateOpen) {
    gateServo.write(90);           // Raise the gate
    delay(1000);                   // Delay for 1 second to ensure stable operation
    gateOpen = true;               // Set the gate open flag
  }

  // Check if the gate is open
  if (gateOpen) {
    // Check if the PIR sensor detects motion (vehicle presence)
    if (digitalRead(pirSensorPin) == HIGH) {
      // Vehicle detected, keep the gate open
      Serial.println("Vehicle detected. Gate will remain open.");
    } else {
      // No vehicle detected, start the countdown to close the gate
      unsigned long startTime = millis();
      while (millis() - startTime <= 10000) {
        // Check if the button is pressed again to interrupt the countdown
        if (digitalRead(buttonPin) == LOW) {
          gateServo.write(90);     // Raise the gate
          delay(1000);             // Delay for 1 second to ensure stable operation
          startTime = millis();    // Reset the countdown
          Serial.println("Button pressed. Gate opening timer reset.");
        }
      }
      
      gateServo.write(0);  // Lower the gate
      delay(1000);         // Delay for 1 second to ensure stable operation
      gateOpen = false;   // Reset the gate open flag
      Serial.println("Gate closed.");
    }
  }
}