WIFI Controlled Car

# ESP8266 and Arduino Controlled Car 🚗📡

A smart RC car project using Arduino Uno and ESP8266 Wi-Fi module, built to demonstrate IoT-based vehicle control.

This project combines embedded hardware with wireless communication, creating a fun and practical application for learning electronics, automation, and networking.

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## ✨ Features

• Remote-controlled car via Wi-Fi (ESP8266)
• Dual motor driver (L298N) for forward, backward, left, and right movement
• Real-time control using a simple web-based interface
• Modular design (can be expanded with sensors like ultrasonic for obstacle avoidance)
• --

## 🛠️ Things used in this project

• Arduino Uno
• ESP8266 Wi-Fi Module (NodeMCU can also be used)
• L298N Motor Driver
• DC Motors (x4 with chassis + wheels)
• Power Source (12V Li-ion battery)
• Jumper wires, breadboard, connectors
• Optional: Ultrasonic sensor for collision detection
• --

## 📂 Software & Code

• Arduino IDE
• ESP8266WiFi library
• Fully documented source code available on GitHub: [ESP8266 car repo on my GitHub profile]
• --

## 🔌 Wiring Overview

• ESP8266 → Arduino (via serial pins)
• Arduino → L298N Motor Driver → Motors
• Power via external battery to motor driver + Arduino Vin
• Enable pins connected to PWM for speed control

(Detailed wiring diagram included in images/schematics section)

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## 📜 Story

The goal of this project was to build a **Wi-Fi controlled smart car** using affordable components like Arduino Uno and ESP8266.

Instead of relying on Bluetooth or IR remote control, I wanted a **wireless solution accessible from a simple web interface**.

The car responds to commands like Forward, Backward, Left, Right, and Stop using the motor driver, while the ESP8266 sets up its own Wi-Fi network for remote control.

This project was built to showcase **IoT + robotics + embedded systems skills** to recruiters, while also being fun to drive around!

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## 🚀 How to Run

1. Upload the following Arduino sketch to the Uno:

#define ENAA 3
#define IN1A 2
#define IN2A 4
#define ENBA 6
#define IN3A 5
#define IN4A 7
#define ENAB 9
#define IN1B 8
#define IN2B 10
#define IN3B 13
#define IN4B 12
#define ENBB 11
void setup() {
Serial.begin(9600);
pinMode(IN1A, OUTPUT); pinMode(IN2A, OUTPUT);
pinMode(IN3A, OUTPUT); pinMode(IN4A, OUTPUT);
pinMode(ENAA, OUTPUT); pinMode(ENBA, OUTPUT);
pinMode(IN1B, OUTPUT); pinMode(IN2B, OUTPUT);
pinMode(IN3B, OUTPUT); pinMode(IN4B, OUTPUT);
pinMode(ENAB, OUTPUT); pinMode(ENBB, OUTPUT);
Serial.println("Pin modes are set!");
}
void loop() {
char command;
if (Serial.available()) {
command = Serial.read();
Serial.println(command);
if (command == 'F') { // Forward
digitalWrite(IN1A, HIGH); digitalWrite(IN2A, LOW);
digitalWrite(IN3A, HIGH); digitalWrite(IN4A, LOW);
analogWrite(ENAA, 255); analogWrite(ENBA, 255);
digitalWrite(IN1B, HIGH); digitalWrite(IN2B, LOW);
digitalWrite(IN3B, HIGH); digitalWrite(IN4B, LOW);
analogWrite(ENAB, 255); analogWrite(ENBB, 255);
}
else if (command == 'B') { // Backward
digitalWrite(IN1A, LOW); digitalWrite(IN2A, HIGH);
digitalWrite(IN3A, LOW); digitalWrite(IN4A, HIGH);
analogWrite(ENAA, 255); analogWrite(ENBA, 255);
digitalWrite(IN1B, LOW); digitalWrite(IN2B, HIGH);
digitalWrite(IN3B, LOW); digitalWrite(IN4B, HIGH);
analogWrite(ENAB, 255); analogWrite(ENBB, 255);
}
else if (command == 'R') { // Right
digitalWrite(IN1A, HIGH); digitalWrite(IN2A, LOW);
digitalWrite(IN3A, LOW);  digitalWrite(IN4A, HIGH);
analogWrite(ENAA, 255); analogWrite(ENBA, 255);
digitalWrite(IN1B, HIGH); digitalWrite(IN2B, LOW);
digitalWrite(IN3B, LOW);  digitalWrite(IN4B, HIGH);
analogWrite(ENAB, 255); analogWrite(ENBB, 255);
}
else if (command == 'L') { // Left
digitalWrite(IN1A, LOW);  digitalWrite(IN2A, HIGH);
digitalWrite(IN3A, HIGH); digitalWrite(IN4A, LOW);
analogWrite(ENAA, 255); analogWrite(ENBA, 255);
digitalWrite(IN1B, LOW);  digitalWrite(IN2B, HIGH);
digitalWrite(IN3B, HIGH); digitalWrite(IN4B, LOW);
analogWrite(ENAB, 255); analogWrite(ENBB, 255);
}
else if (command == 'S') { // Stop
digitalWrite(IN1A, LOW); digitalWrite(IN2A, LOW);
digitalWrite(IN3A, LOW); digitalWrite(IN4A, LOW);
analogWrite(ENAA, 0); analogWrite(ENBA, 0);
digitalWrite(IN1B, LOW); digitalWrite(IN2B, LOW);
digitalWrite(IN3B, LOW); digitalWrite(IN4B, LOW);
analogWrite(ENAB, 0); analogWrite(ENBB, 0);
}
}
}
2.Upload this code to ESP8266:

#include <ESP8266WiFi.h>
#define ssid "ESP8266 CAR"
#define password "Ydp6361#"

WiFiServer server(80);

void setup() {
  Serial.begin(9600);
  WiFi.softAP(ssid, password);
  server.begin();
  Serial.println("WiFi is created!");
  Serial.print("IP : ");
  Serial.println(WiFi.softAPIP());
}

void loop() {
  WiFiClient client = server.available();
  if (client) {
    Serial.println("Client connected!");
    String command = client.readStringUntil('\r');
    client.flush();

    int index = command.indexOf("?State=");
    if (index != -1) {
      char c = command.charAt(index + 7);
      Serial.print("Command: ");
      Serial.println(c);
    }
    client.stop();
  }
}
#include <ESP8266WiFi.h>
#define ssid "ESP8266 CAR"
#define password "Ydp6361#"

WiFiServer server(80);

void setup() {
  Serial.begin(9600);
  WiFi.softAP(ssid, password);
  server.begin();
  Serial.println("WiFi is created!");
  Serial.print("IP : ");
  Serial.println(WiFi.softAPIP());
}

void loop() {
  WiFiClient client = server.available();
  if (client) {
    Serial.println("Client connected!");
    String command = client.readStringUntil('\r');
    client.flush();

    int index = command.indexOf("?State=");
    if (index != -1) {
      char c = command.charAt(index + 7);
      Serial.print("Command: ");
      Serial.println(c);
    }
    client.stop();
  }
}

Connect to Wi-Fi hotspot

• Connect to Wi-Fi hotspot

Open the web app/control interface

• Open the web app/control interface

Drive your IoT-powered car! 🚗

• Drive your IoT-powered car! 🚗

🎯 Learning Outcomes

Basics of Arduino + ESP8266 integration

• Basics of Arduino + ESP8266 integration

Motor control using L298N driver

• Motor control using L298N driver

Web-controlled robotics

• Web-controlled robotics

Hands-on IoT + embedded systems project

• Hands-on IoT + embedded systems project

👤 Author

Dev YadavPursuing B.Tech in Electronics & Communication Engineering

• LinkedIn:

https://www.linkedin.com/in/deev-yadav-826859372?utm_source=share&utm_campaign=share_via&utm_content=profile&utm_medium=android_app

• GitHub:

DevYadav3672/ESP8266-CAR: This car is working on arduino uno , 2 L298N motor drivers , ESP8266 , 4Motors