Bluetooth Controlled Car
An Arduino-powered robotic car controlled wirelessly from a smartphone using Bluetooth commands and an L298N motor driver circuit.
Project Overview
This project demonstrates wireless control of a small robotic car using a Bluetooth module and a smartphone application. The car receives directional movement commands—forward, backward, left, right, and stop—directly from a mobile interface.
The Arduino Uno reads Bluetooth signals and coordinates DC motor rotation through an L298N motor driver, serving as a foundational robotics project for mastering serial communication and motor actuation.
Core Hardware Modules
Project Resources
Pin Configuration
| Component | NodeMCU Pin |
|---|---|
| HC-SR04 TRIG | D1 (GPIO5) |
| HC-SR04 ECHO | D2 (GPIO4) |
| LED Indicator | D5 (GPIO14) |
| VCC | VIN |
| GND | GND |
System Workflow
Google Assistant
ESP RainMaker
ESP32
Relay Module
Home Appliances
Project Source Codes
1. Arduino Bluetooth Car Firmware
Controls Bluetooth communication, motor movement, direction commands, and L298N motor driver operations.
View Arduino Source Code
/*
Bluetooth Controlled Car
Arduino Uno + HC-05 + L298N
*/
#include <SoftwareSerial.h>
/* Complete source available in download */
2. Android Controller Application
Mobile application used to send Bluetooth commands such as Forward, Backward, Left, Right and Stop.
View App Information
Application Features:
• Bluetooth Pairing (HC-05)
• Forward Movement
• Backward Movement
• Left Turn
• Right Turn
• Stop Command
• Wireless Real-Time Control