Bluetooth Robot rev_01

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    - Project: Bluetooth Robot
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-07-30 06:19:50

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* Implement a system to control an LED connected to */
    /* GPIO pin 2 of the ESP32 DevKit V1, allowing it to */
    /* turn on and off via serial commands. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <BluetoothSerial.h>

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void executeVoiceCommand(String command);
void moveForward();
void moveBackward();
void turnLeft();
void turnRight();
void stopMotors();

/* Define motor driver pins */
const int IN1 = 18;
const int IN2 = 19;
const int IN3 = 21;
const int IN4 = 22;

// Define LED pin
const int LED_PIN = 2;

BluetoothSerial bluetooth;

void setup(void)
{
  // Initialize Bluetooth
  bluetooth.begin("ESP32_Voice_Control"); // Bluetooth device name

  // Initialize motor control pins
  pinMode(IN1, OUTPUT);
  pinMode(IN2, OUTPUT);
  pinMode(IN3, OUTPUT);
  pinMode(IN4, OUTPUT);

  // Initialize LED pin
  pinMode(LED_PIN, OUTPUT);

  // Stop motors at startup
  stopMotors();
}

void loop(void)
{
  if (bluetooth.available()) {
    String command = bluetooth.readStringUntil('\n'); // Read command from Bluetooth
    command.trim(); // Remove whitespace or newline
    executeVoiceCommand(command);
  }
}

void executeVoiceCommand(String command) {
  if (command.equalsIgnoreCase("moveforward")) {
    moveForward();
  } else if (command.equalsIgnoreCase("move backward")) {
    moveBackward();
  } else if (command.equalsIgnoreCase("turnleft")) {
    turnLeft();
  } else if (command.equalsIgnoreCase("turnright")) {
    turnRight();
  } else if (command.equalsIgnoreCase("stop")) {
    stopMotors();
  } else if (command.equalsIgnoreCase("ledon")) {
    digitalWrite(LED_PIN, HIGH);
    bluetooth.println("LED ON");
  } else if (command.equalsIgnoreCase("ledoff")) {
    digitalWrite(LED_PIN, LOW);
    bluetooth.println("LED OFF");
  } else {
    bluetooth.println("UnknownCommand: " + command);
  }
}

void moveForward() {
  analogWrite(IN1, 135);
  analogWrite(IN2, 0);
  analogWrite(IN3, 135);
  analogWrite(IN4, 0);
  bluetooth.println("MovingForward");
}

void moveBackward() {
  analogWrite(IN1, 0);
  analogWrite(IN2, 135);
  analogWrite(IN3, 0);
  analogWrite(IN4, 135);
  bluetooth.println("MovingBackward");
}

void turnRight() {
  analogWrite(IN1, 135);
  analogWrite(IN2, 0);
  analogWrite(IN3, 0);
  analogWrite(IN4, 135);
  bluetooth.println("TurningRight");
}

void turnLeft() {
  analogWrite(IN1, 0);
  analogWrite(IN2, 135);
  analogWrite(IN3, 135);
  analogWrite(IN4, 0);
  bluetooth.println("TurningLeft");
}

void stopMotors() {
  analogWrite(IN1, 0);
  analogWrite(IN2, 0);
  analogWrite(IN3, 0);
  analogWrite(IN4, 0);
  bluetooth.println("MotorsStopped");
}

/* END CODE */