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Bluetooth Car C++ Code

This project allows you to control a car connected to an ESP32 board via Bluetooth. The devices include a steering servo, LED underglow, motor, and distance sensors. The system uses Bluetooth to receive commands and send sensor data at regular intervals.

Hardware Requirements

  • ESP32 with Bluetooth
  • Servo (MG90S)
  • LEDs
  • Motor driver (L298N)
  • Ultrasonic Distance Sensors (HCSR04)

Libraries Required

  • BluetoothSerial - To enable Bluetooth communication between the ESP32 and a mobile device.
  • ServoDevice - A custom class to control the servo motor.
  • LEDDevice - A custom class to control LEDs.
  • MotorDevice - A custom class to control the motor.
  • HCSR04Device - A custom class to control the HCSR04 ultrasonic distance sensors.

Pin Configuration

  • Servo Motor: Pin 13
  • LED UnderGlow: Pin 12
  • Motor Driver:
    • Pin 27 (Motor Control)
    • Pin 26 (Motor Control)
    • Pin 25 (Motor Control)
  • HCSR04 Sensors:
    • Left Sensor: Trigger Pin 17, Echo Pin 16
    • Right Sensor: Trigger Pin 19, Echo Pin 18

Bluetooth Setup

  • The mobile device should be paired with the device named "Nissan".
  • The ESP32 communicates with the mobile device using BluetoothSerial, allowing commands to control the devices connected to the ESP32.

Code Workflow

  1. Setup:

    • Initializes serial communication.
    • Configures each connected device (servo, underglow LED, motor, and ultrasonic sensors).
    • Sets up Bluetooth communication with the mobile device.

  2. Loop:

    • Continuously reads commands sent via Bluetooth.
    • Processes commands to control the underglow LED (turn it on or off).
    • Sends sensor data (e.g., distance) to the mobile device at regular intervals.

Commands

  • underglow on: Turns on the LED underglow.
  • underglow off: Turns off the LED underglow.