ESP32 Wi-Fi Provisioning + LED Control Interface

A fully interactive setup flow for provisioning your ESP32 device via a sleek captive portal and controlling multiple LEDs via either HTTP or serial commands. This project also features handshake logic to communicate with a Unity game, enabling real-time hardware feedback.

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🌟 Features

• Captive portal UI for initial Wi-Fi configuration
• Dynamic scanning and selection of available networks
• Stores SSID and password using EEPROM
• Supports LED control over:
  • HTTP requests (/led?led=1&state=1)
  • Serial commands (from Unity handshake)
• mDNS support: access the device via http://esp32-led.local
• Handshake listener to verify Unity connection (dis u? → ya)

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🛠️ Requirements

• ESP32 board (tested on ESP32-WROOM-32)
• Arduino IDE
• Arduino libraries:
  • WiFi.h
  • WebServer.h
  • DNSServer.h
  • EEPROM.h
  • ESPmDNS.h

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🌐 Captive Portal UI

The HTML, CSS, and JavaScript are embedded in the sketch via raw string literal. This UI:

• Greets the user with a fun onboarding screen
• Lets them scan nearby Wi-Fi networks
• Allows SSID/password input
• Animates the connection process

Note: the UI auto-redirects all HTTP traffic through DNS spoofing via the AP.

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🚀 Getting Started

1. Flash to ESP32

• Rename the file to .ino if it's still .cpp
• Open with Arduino IDE
• Install the necessary libraries (see above)
• Connect your ESP32 via USB
• Select correct port and board from Tools menu
• Upload!

2. Connect to Captive Portal

• Your ESP32 will broadcast a network: ESP32_Provisioning
• Password: 12345678
• Connect from any device and open a browser. It should redirect automatically.

3. Enter Wi-Fi Credentials

• Choose a network from the scan list
• Input password
• Click Connect
• If successful, you'll see a confirmation + Done button

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🛡️ LED Control API

Over HTTP

• GET /led?led=1&state=1 → turns LED 1 ON
• GET /led?led=2&state=0 → turns LED 2 OFF

Over Serial (from Unity or Serial Monitor)

• Format: 1:1 or 2:0 (LED #: state)
• Send dis u? to trigger handshake → ESP32 replies ya

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💡 Tip: Unity Integration

To pair with Unity:

• Use SerialPort.WriteLine("dis u?") to confirm ESP32 presence
• Then use SerialPort.WriteLine("1:1") to control LED 1
• Ensure Unity serial port settings match ESP32 baud rate: 115200

Without the Unity-side handshake, the device won't respond over serial.

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🚩 Troubleshooting

• Can't connect to esp32-led.local? Try the IP shown in serial monitor
• If Wi-Fi fails, reflash or add logic to reset EEPROM
• Using a different ESP32? Pin mappings may need updating

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🎓 Credits

Designed and built with love by meeee ✨

⚠️ Note: This project stems from work done for a startup prototype involving ESP32 device provisioning and Unity integration. The version in this repository is a representative example, built for open-source demonstration and stripped of proprietary elements or production-specific code.