🚗 ESP8266 WiFi Controlled 4WD Smart Car

🔥 A fully wireless, app-controlled 4WD robot car powered by ESP8266 with a custom web-based joystick UI — no app required!

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🎥 YouTube Demo

▶️ Watch Full Project Video: https://youtu.be/jsqwnJNBA3M

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📸 Project Preview

🔧 Internal Wiring

🚗 Final Build

📲 Mobile Control UI

🔌 Circuit Diagram

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⚡ Quick Start

1. Upload code to ESP8266 using Arduino IDE
2. Power the car
3. Connect mobile to WiFi: CAR_v1.0
4. Open browser → 192.168.4.1
5. Control the car using UI

⚡ Features

• 📡 WiFi Control (No App Needed)

• 📱 Works directly in browser (192.168.4.1)

• 🎮 Real-time Touch Controls

• 🚗 4WD Drive (All Wheels Powered)

• 🔁 Forward / Reverse / Left / Right

• 💡 LED Controls

  • Hazard (blinking)
  • Headlights (ON/OFF)

• 🛑 Emergency Stop Mode (E-STOP)

• ⚙️ Dual Speed Modes

• 🎨 Modern Glass UI with animations

• 🔌 Battery powered (portable)

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💡 Why This Project?

• No Android app required
• Works on any phone browser
• Clean UI design
• Easy to build
• Beginner + Advanced friendly

🧠 How It Works

1. ESP8266 creates its own WiFi hotspot
2. Mobile connects to that network
3. Open browser → 192.168.4.1
4. UI loads → sends HTTP commands
5. ESP8266 processes → controls motors via L298N

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🛠️ Hardware Used

Component	Quantity
ESP8266 NodeMCU	1
L298N Motor Driver	1
BO Motors (Yellow)	4
Wheels	4
18650 Li-ion Batteries	2
Switch	1
LEDs (Red + White)	4
Resistors (100Ω)	2
Chassis	1

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🔌 Pin Configuration

L298N:
IN1 → D1
IN2 → D2
IN3 → D5
IN4 → D6
ENA → D7
ENB → D0

LEDs:
RED LED   → D3
WHITE LED → D8

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📱 Control Interface

• FWD / REV → Movement
• LEFT / RIGHT → Steering
• HAZARD → Blinking red LED
• LIGHTS → White LED
• M1 → High Speed
• M2 → Fast Turning
• STOP → Emergency shutdown

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💻 Code Overview

Main logic:

• WiFi Access Point mode
• Web server (ESP8266WebServer)
• HTTP route-based control
• PWM motor control
• Non-blocking LED blinking

Example

server.on("/forward", HTTP_GET, []{
  forward();
  server.send(200,"text/plain","OK");
});

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🔋 Power System

• Uses 2× 18650 Li-ion batteries
• Direct supply to L298N
• ESP powered via onboard regulator

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🚀 Applications

• DIY Robotics Learning
• IoT Projects
• STEM Education
• RC Vehicle Systems
• Industrial Prototyping

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📈 Future Improvements

• 📷 Add ESP32-CAM for live video
• 📡 Add internet (cloud control)
• 🧠 Obstacle avoidance
• 🎮 Gamepad control
• 🔋 Battery monitoring system

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⚠️ Notes

• Avoid using damaged pins (like D4, D10 if applicable)
• Use proper battery protection
• L298N reduces efficiency — can upgrade to TB6612FNG

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❤️ Support

If this project helped you:

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👨‍💻 Author

Humanix Tech

🔗 GitHub: https://github.com/humanixtech