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.