A wireless robotic vehicle controlled via Bluetooth using HC-05 module and TM4C123GXL microcontroller. Supports multiple operation modes including free navigation and predefined geometric patterns.

• Dual Operation Modes:
  • Free Ride Mode: Manual control via smartphone (2m range)
  • Custom Shapes Mode: Autonomous execution of geometric patterns
• Bluetooth Configuration: AT command setup for HC-05 module
• Motor Control: PWM-driven DRV8838 motor driver for precise movement
• Expandable Architecture: Optional IR/ultrasonic sensors for obstacle avoidance

// Example AT commands from setupbluetooth.c
void configureBluetooth() {
    sendATCommand("AT+NAME=BluetoothCar");
    sendATCommand("AT+PSWD=1234");
    sendATCommand("AT+UART=9600,0,0");
}

Required Tools:

• USB-TTL converter for AT command configuration
• Terminal software (Putty/CoolTerm)

Movement Commands:

• F: Forward
• B: Backward
• L: Left turn
• R: Right turn
• S: Emergency stop

main.c
├── bluetooth_handler.c
├── motor_control.c
├── pattern_generator.c
└── setupbluetooth.c

1. Flash setupbluetooth.c to configure HC-05 module
2. Upload main firmware to TM4C123GXL
3. Pair with Android device using PIN 1234
4. Use terminal app or custom Android controller

• Battery Monitoring: Integrated voltage sensing
• LED Status Indicators: System state visualization