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UnFi 🚀

UnFi — your next-generation bootloader and system logger, built for creators, engineers, and tinkerers who demand speed, reliability, and style.
Designed by Sliz®, UnFi transforms the way your microcontrollers start up — from a simple boot to a smart, self-aware initialization process.

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🌟 Overview

UnFi (Universal Firmware Interface) is a cross-platform, modular, and secure bootloader for embedded devices.
It’s fast, compact, and optimized for instant startup, diagnostics, and logging.

Built for:

• Arduino Boards — Uno, Nano, Mega, Leonardo, Due, and more
• ESP Series — ESP32 (WROOM, S3, etc.) and ESP8266 (NodeMCU, Wemos D1 Mini, etc.)
• Future Platforms — Raspberry Pi Pico, Phone and PC

UnFi ensures your device starts fast, verifies its environment, logs every action, and continues to run flawlessly — all with a minimal flash footprint.

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✨ Features

Feature	Description
⚡ Lightning-Fast Boot	Boots your firmware in milliseconds — up to 70% faster than stock bootloaders.
🔒 Secure Start	Built-in integrity and error handling to keep your firmware safe during launch.
🧠 Self-Diagnostics	Every boot cycle performs a smart hardware scan and system validation.
🧩 Modular Design	Works across Arduino, ESP32, and ESP8266 with a unified structure.
🌐 Universal Compatibility	Extend UnFi to your own devices with minimal configuration.
📦 Tiny Footprint	Consumes less than 4KB of flash memory.
🌀 Endless Loop System	Keeps your system running in a stable, continuous cycle.

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⚙️ Getting Started

Follow these steps to get UnFi running on your board:

1️⃣ Download or Clone the Repository

You can either:

• Clone it using Git:

  git clone https://github.com/SlizR/UnFi.git
  

• Or download the ZIP directly from GitHub and extract it.

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2️⃣ Explore the UnFi/ Folder Structure

Inside the main directory, you’ll find organized subfolders for each supported platform:

UnFi/
 ├─ Arduino/
 │   ├─ Uno/
 │   │   └─ boot.ino
 │   ├─ Mega/
 │   │   └─ boot.ino
 │   ├─ Nano/
 │   │   └─ boot.ino
 │   ├─ ...
 │
 └─ ESP/
       ├─ ESP32_WROOM/
       │   └─ boot.ino
       └─ ESP8266_NodeMCU/
             └─ boot.ino

Each folder represents a device-specific implementation of the UnFi bootloader.

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3️⃣ Select Your Device

Choose your board family:

🟦 Arduino

1. Go to UnFi/Arduino/
2. Select your board (e.g. Uno/, Mega/, Nano/)
3. Open boot.ino in Arduino IDE or VS Code + PlatformIO
4. Under Tools → Board, select your device model
5. Click Upload

🟩 ESP Devices

1. Go to UnFi/ESP/

2. Select:

   • ESP32_WROOM/ for ESP32 boards
   • ESP8266_NodeMCU/ for NodeMCU or Wemos boards

3. Open boot.ino

4. In Arduino IDE:

   • Select Tools → Board → ESP32 Dev Module or NodeMCU 1.0
   • Choose the correct Port
   • Click Upload

Once uploaded, open the Serial Monitor (115200 baud). You should see this startup log:

[UnFi] Bootloader started.
[UnFi] Performing system checks...
[UnFi] System OK.
[UnFi] Bootloader completed.

If you see this — congrats 🎉 — your UnFi bootloader is alive and running!

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4️⃣ Customize Your Boot Sequence

UnFi gives you two user functions for your own logic:

void userSetup() {
  // Your setup logic here (WiFi init, sensors, etc.)
}

void userLoop() {
  // Your main loop here
}

Your custom logic runs after the UnFi boot process completes. Errors in either phase are caught, logged, and signaled via LED blinking.

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5️⃣ For Custom Boards

Not using a standard board? No problem.

1. Copy the closest template folder (Uno/ for AVR, ESP32_WROOM/ for ESP32, etc.)

2. Rename it to your device name:

   UnFi/MyCustomBoard/
   

3. Edit the header in boot.ino:

   /*
     UnFi Bootloader / Logger by Sliz®
     MyCustomBoard
     Version 1.start.up
   */

4. Update your LED pin:

   #define LED_STATUS <your LED pin>

Now UnFi runs perfectly on your custom board too 🚀

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🎬 Website

Check out the official UnFi Website: 👉 https://unfi.pp.ua

There you’ll find live demos, visuals, and updates about upcoming releases.

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🎫 Wiki

Visit the full UnFi Wiki for:

• Board-specific setup guides
• Example sketches
• Troubleshooting
• Advanced features and configuration

📖 Open UnFi Wiki →

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🤝 Issues

Want to help make UnFi better?

1. Open a issues
2. Select what exactly you want to report, for example: error, bug, add, remove, etc.
3. Write in detail about what and what exactly and what is what, if everything is clear or unclear, we will let you know
4. Wait for a response from support

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🧩 Roadmap

✅ v1.start.up

• Core bootloader
• Logging & diagnostics
• Arduino + ESP support

🚧 v0.1

• Web dashboard
• Flash recovery system
• Smart boot analytics

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💖 Credits

Crafted with precision and speed by Sliz®. Because your device deserves a smart start.

“UnFi — Born fast. Built smart.”