🛰️ ESP8266 Smart Device Controller

WiFi-enabled embedded system implementing a Finite State Machine (FSM) for real-time device control.

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🚀 Key Features

• Non-blocking Execution: Uses millis() instead of delay() to maintain responsiveness
• State Machine Design:
  • OFF
  • ON
  • AUTO_TIMEOUT
• REST-style API:
  • /api/state returns current state in JSON
• Dynamic UI:
  • Web interface updates in real-time using API polling
• Lightweight Web Server:
  • Runs directly on ESP8266

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🛠️ Tech Stack

• Hardware: ESP8266 (NodeMCU)
• Firmware: C++ (Arduino framework)
• Communication: HTTP
• Frontend: HTML, CSS, JavaScript

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🔌 API Reference

Endpoint	Method	Description
/api/state	GET	Returns current state
/on	GET	Set state to ON
/off	GET	Set state to OFF

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🧠 System Architecture

• WiFi Layer: Connects ESP8266 to local network
• Server Layer: Handles HTTP requests
• Logic Layer: Implements FSM and timing using millis()

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🔧 Setup

1. Clone the repo
2. Add WiFi credentials in .ino file
3. Upload using Arduino IDE
4. Open Serial Monitor to get IP
5. Access via browser

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🎥 Demo

https://drive.google.com/file/d/16QziZQ29N9CDDHXkpdHTcYWKCPKWFhA3/view?usp=sharing

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📈 Future Improvements

• MQTT-based communication
• Sensor-based automation
• OTA firmware updates