// #include <Wire.h>
// #include <Adafruit_MPU6050.h>
// #include <Adafruit_Sensor.h>
// #include <WiFi.h> // To add Wi-Fi functionality later if needed

// // Pin Definitions
// #define PIR_PIN 27  // GPIO connected to the PIR sensor

// // Variables for PIR and MPU-6050
// Adafruit_MPU6050 mpu;
// bool pirMotionDetected = false;

// // Function Declarations
// void setupPIR();
// void setupMPU6050();
// void checkPIRSensor();
// void checkMPU6050();
// void sendAlert(const char* message);

// void setup() {
//   Serial.begin(115200);

//   // Initialize Sensors
//   setupPIR();
//   setupMPU6050();
  
//   Serial.println("System Initialized. Monitoring for movement...");
// }

// void loop() {
//   checkPIRSensor();      // Check for motion via PIR
//   checkMPU6050();        // Check for tilt/movement via MPU-6050
//   delay(500);            // Delay for stability; adjust as necessary
// }

// // Function to initialize the PIR sensor
// void setupPIR() {
//   pinMode(PIR_PIN, INPUT);
//   Serial.println("PIR sensor initialized.");
// }

// // Function to initialize the MPU-6050 sensor
// void setupMPU6050() {
//   if (!mpu.begin()) {
//     Serial.println("Failed to find MPU6050 chip.");
//     while (1) delay(10);  // Halt if MPU fails
//   }
//   Serial.println("MPU6050 initialized successfully.");

//   // Set desired ranges
//   mpu.setAccelerometerRange(MPU6050_RANGE_2_G);
//   mpu.setGyroRange(MPU6050_RANGE_250_DEG);
// }

// // Function to check for PIR sensor motion
// void checkPIRSensor() {
//   int pirStatus = digitalRead(PIR_PIN);
//   if (pirStatus == HIGH && !pirMotionDetected) {
//     pirMotionDetected = true;
//     Serial.println("PIR Motion detected!");
//     sendAlert("Motion detected by PIR sensor.");
//   } else if (pirStatus == LOW && pirMotionDetected) {
//     pirMotionDetected = false;
//     Serial.println("No motion detected by PIR sensor.");
//   }
// }

// // Function to check for MPU-6050 movement
// void checkMPU6050() {
//   sensors_event_t a, g, temp;
//   mpu.getEvent(&a, &g, &temp);

//   // Define thresholds for motion/tilt detection
//   float threshold = 3.0;  // Adjust based on sensitivity needs
//   if (abs(a.acceleration.x) > threshold || 
//       abs(a.acceleration.y) > threshold || 
//       abs(a.acceleration.z) > threshold) {
//     Serial.println("Significant movement detected by MPU6050!");
//     sendAlert("Significant movement detected by MPU6050 sensor.");
//   }
// }

// // Function to handle sending alerts (replace with actual Wi-Fi or Cloud code)
// void sendAlert(const char* message) {
//   // Placeholder for sending alert (e.g., through Wi-Fi or GSM)
//   Serial.print("Alert: ");
//   Serial.println(message);
  
//   // You can add Wi-Fi or Cloud notification code here
//   // Example: Send data to Firebase or Blynk
// }


#include <Wire.h>
#include <Adafruit_MPU6050.h>
#include <Adafruit_Sensor.h>
#include <WiFi.h> // To add Wi-Fi functionality later if needed

// Pin Definitions
#define PIR_PIN 27  // GPIO connected to the PIR sensor
#define TRIG_PIN 12 // GPIO connected to the HC-SR04 Trigger
#define ECHO_PIN 13 // GPIO connected to the HC-SR04 Echo

// Variables for PIR, MPU-6050, and Ultrasonic sensor
Adafruit_MPU6050 mpu;
bool pirMotionDetected = false;

// Function Declarations
void setupPIR();
void setupMPU6050();
void setupUltrasonic();
void checkPIRSensor();
void checkMPU6050();
void checkUltrasonic();
void sendAlert(const char* message);

// Variables for Ultrasonic sensor
long duration;
int distance;

void setup() {
  Serial.begin(115200);

  // Initialize Sensors
  setupPIR();
  setupMPU6050();
  setupUltrasonic();
  
  Serial.println("System Initialized. Monitoring for movement...");
}

void loop() {
  checkPIRSensor();      // Check for motion via PIR
  checkMPU6050();        // Check for tilt/movement via MPU-6050
  checkUltrasonic();     // Check for distance via HC-SR04 Ultrasonic sensor
  delay(500);            // Delay for stability; adjust as necessary
}

// Function to initialize the PIR sensor
void setupPIR() {
  pinMode(PIR_PIN, INPUT);
  Serial.println("PIR sensor initialized.");
}

// Function to initialize the MPU-6050 sensor
void setupMPU6050() {
  if (!mpu.begin()) {
    Serial.println("Failed to find MPU6050 chip.");
    while (1) delay(10);  // Halt if MPU fails
  }
  Serial.println("MPU6050 initialized successfully.");

  // Set desired ranges
  mpu.setAccelerometerRange(MPU6050_RANGE_2_G);
  mpu.setGyroRange(MPU6050_RANGE_250_DEG);
}

// Function to initialize the HC-SR04 ultrasonic sensor
void setupUltrasonic() {
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  Serial.println("HC-SR04 Ultrasonic sensor initialized.");
}

// Function to check for PIR sensor motion
void checkPIRSensor() {
  int pirStatus = digitalRead(PIR_PIN);
  if (pirStatus == HIGH && !pirMotionDetected) {
    pirMotionDetected = true;
    Serial.println("PIR Motion detected!");
    sendAlert("Motion detected by PIR sensor.");
  } else if (pirStatus == LOW && pirMotionDetected) {
    pirMotionDetected = false;
    Serial.println("No motion detected by PIR sensor.");
  }
}

// Function to check for MPU-6050 movement
void checkMPU6050() {
  sensors_event_t a, g, temp;
  mpu.getEvent(&a, &g, &temp);

  // Define thresholds for motion/tilt detection
  float threshold = 3.0;  // Adjust based on sensitivity needs
  if (abs(a.acceleration.x) > threshold || 
      abs(a.acceleration.y) > threshold || 
      abs(a.acceleration.z) > threshold) {
    Serial.println("Significant movement detected by MPU6050!");
    sendAlert("Significant movement detected by MPU6050 sensor.");
  }
}

// Function to check for distance using the HC-SR04 ultrasonic sensor
void checkUltrasonic() {
  // Send a pulse to trigger the ultrasonic sensor
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  
  // Read the pulse duration from the Echo pin
  duration = pulseIn(ECHO_PIN, HIGH);
  
  // Calculate distance in cm
  distance = duration * 0.0344 / 2;  // Speed of sound is 0.0344 cm/us
  
  if (distance < 50) {  // Example threshold for detecting proximity (less than 50 cm)
    Serial.println("Object detected near vehicle!");
    sendAlert("Object detected near vehicle by Ultrasonic sensor.");
  }
}

// Function to handle sending alerts (replace with actual Wi-Fi or Cloud code)
void sendAlert(const char* message) {
  // Placeholder for sending alert (e.g., through Wi-Fi or GSM)
  Serial.print("Alert: ");
  Serial.println(message);
  
  // You can add Wi-Fi or Cloud notification code here
  // Example: Send data to Firebase or Blynk
}