RANGMANG 2 v2.0

RANGMANG 2 is a professional serial RGB controller based on the ATmega128 microcontroller, designed for single‑module operation. It supports 50 channels, each with 255 pixels — giving you a total of 12,750 addressable pixels per module.

RANGMANG 2 RGB Controller Module - compatible with WS2812 LED strips

RANGMANG 2 PCB and schematic based on ATmega128

Key Features

MCU: ATmega128 (11.0592 MHz)

Channels: 50 (A1–A50)

Pixels/Ch: 255 (1–255)

Total LEDs: 12,750

Protocol: UART / BT (HC‑05) 115200

Command: ARGBSE (hex encoded)

LEDs: WS2812, WS2811, WS2813, WS2815

Use: LED matrix, scrolling signs, advertising

Why Choose RANGMANG 2 for Your LED Project?

💰 Budget-Friendly

Build a professional LED display without breaking the bank. Perfect for small businesses and hobbyists.

🆓 Free Software

No paid licenses or subscriptions. Use the free Web Tool to design and generate commands instantly.

🔌 Plug & Play

Works with WS2812, WS2811, WS2813, WS2815 strips. Just connect and start controlling.

📡 50 Independent Channels

Control up to 50 separate LED strips or segments – ideal for large installations.

Perfect for Your Next LED Project

📢 Free Advertising Displays: Build a low-cost scrolling text sign for your shop window or event.
🎨 DIY LED Matrix: Create a colorful, animated matrix panel using affordable WS2812B or WS2811 strips.
💡 Custom RGB Lighting: Control large-scale architectural or decorative lighting installations with 50 independent channels.
🛠️ Education & Prototyping: An ideal platform for learning about addressable LEDs, serial communication, and embedded systems.

Command Protocol — ARGBSE

Every command must end with a newline (\n or \r\n). Only uppercase letters are accepted. No spaces.

Letter	Meaning	Range	Description
A	Channel Address	1 – 50	Channel number
R	Red	0 – 255	Red intensity
G	Green	0 – 255	Green intensity
B	Blue	0 – 255	Blue intensity
S	Start	0 – 255	First pixel index
E	End	1 – 255	Last pixel index

ARGBSE Data Encoding — Hex Transmission

To minimize character payload, each variable is converted to 2-character hexadecimal before transmission. The microcontroller then decodes each byte and executes the command.

Variable	Meaning	Range	Hex Range	Chars
A	Channel Address	1 – 50	01 – 32	2
R	Red	0 – 255	00 – FF	2
G	Green	0 – 255	00 – FF	2
B	Blue	0 – 255	00 – FF	2
S	Start	0 – 255	00 – FF	2
E	End	1 – 255	01 – FF	2

Total per command: 6 variables × 2 hex chars = 12 characters

Packet Structure — Multi-Command Transmission

Commands are transmitted in packets of up to 20. Each packet can contain 1 to 20 commands, processed in order.

Packet Rules

Up to 20 commands can be sent in one transmission
If fewer than 20, only available commands are sent
Even a single command is valid and processed
Commands are processed in the order received

🧰 RANGMANG 2 Web Tool — User Guide

The RANGMANG 2 Web Tool (available via the Web Simulator) is a companion application that converts images and pixel designs into hex‑encoded ARGBSE commands for direct transmission to the ATmega128 controller. Perfect for creating cheap LED matrix displays, free scrolling signs, and digital advertising using WS2812 / WS2811 / WS2813 / WS2815 strips.

1. How to Use the Web Tool

Upload Images: Click “Choose Images” or drag & drop one or more images onto the canvas.
Adjust Settings: Set Channels (1–50) and Pixels per Channel (1–255) to match your LED layout.
Copy & Send: Use “Copy” to copy the hex string to your clipboard, or send it directly via SoifGo.

2. Packet Size — 20 Commands per Transmission

The Web Tool groups up to 20 commands into a single packet for better efficiency. This means:

Each packet contains up to 20 hex commands (12 chars each = 240 characters).
If you have fewer than 20, only the available commands are sent.
Even a single command is valid and processed correctly.
Commands are executed in the exact order they appear.

3. Wait Value — Inter‑Frame Delay

Each frame in the Web Tool has a wait value (in milliseconds) defining display delay:

Default: wait = 0 (no delay).
To set: Use “Wait (S)” input box and click “Apply”.

4. SoifGo Integration — Custom Wait

In the SoifGo smartphone app, navigate to SoifGo Settings → Note Out and toggle Custom Wait to enable or disable timing parsing.

5. Quick Tips

Output not updating? Click “Process All” after uploading images.
Microcontroller not responding? Check baud rate (115200 baud).
Colors look wrong? Toggle “RBG (WS2811)” to swap Green/Blue channels.

✅ Frame Speed Optimization

 

------------------------------------------------------------
⚡ Channel Buffer (Frame Speed Optimization)
By default, the system clears 50 channels/threads before rendering each frame.
If you are using fewer channels (e.g., only 12), you can send the exact count
to the microcontroller. It will then skip clearing unused threads,
which slightly increases the frame rate.

Send the following command:
CH=12

Expected confirmation reply:
OK CH=12

(Replace 12 with your actual number of connected channels).

Sample operation of MINI CAD-CAM

PCB and Schematic Files ATmega128A

📦 Download All Project Files

⬅ Back to Tutorials ⬅ Back to SoifGo Home

RANGMANG 2 — ATmega128 Hardware RGB LED Controller for WS2812, WS2811, WS2813, WS2815. Ideal for LED matrix, scrolling signs, and digital advertising. 50 channels, 255 pixels per channel.