SpawnDev.MatrixLEDDisplay 2.0.0

Prefix Reserved
.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package SpawnDev.MatrixLEDDisplay --version 2.0.0
                    


                    

                
NuGet\Install-Package SpawnDev.MatrixLEDDisplay -Version 2.0.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="SpawnDev.MatrixLEDDisplay" Version="2.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="SpawnDev.MatrixLEDDisplay" Version="2.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="SpawnDev.MatrixLEDDisplay" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add SpawnDev.MatrixLEDDisplay --version 2.0.0
                    


                    

                
#r "nuget: SpawnDev.MatrixLEDDisplay, 2.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package SpawnDev.MatrixLEDDisplay@2.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=SpawnDev.MatrixLEDDisplay&version=2.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=SpawnDev.MatrixLEDDisplay&version=2.0.0
                    


                            Install as a Cake Tool

SpawnDev.MatrixLEDDisplay

Blazor WebAssembly code and demo app for communicating with the "Matrix LED Display" by Merkury Innovations, aka "MI Matrix Display".

Web app

  • MI Matrix Display Web App
  • Display .jpg, .png, or .gif images on your 16x16 LED display using your web browser and Bluetooth.
  • Animated .gif images are supported (limited to 8 frames.)
  • No graffiti mode at this time.
  • Media library for easy image management

Matrix LED Display

This neat 178mm (7 inch) square USB powered display features a 16x16 multi-color LED grid and can be found at places like Walmart here for about $20.

The problem

The instructions that come with this display tells the user to install an app on their phone named "MI Matrix Display"... but there is no app with that name in the iOS App Store or the Android Play Store. There are apps that claim to be the new version of the official app, MatrixPanel Plus on Android, and Matrix Panel Plus on iOS, but the publisher is a one-off publisher named "Chrisamy" not the display maker "Merkury Innovations". Merkury Innovations website doesn't list this display. This YouTube reviewer had the same issue.

I tried "MatrixPanel Plus" on 3 Android phones and the app only worked on 1 of them (the only Samsung, and newer than the others.) The problem appears to be the app itself because my old Moto E running Android 10 was able to connect to and control the MI Matrix Display using Google Chrome and this MI Matrix Display Web App.

So if you bought one of these cool displays and want an alternative to the default app, this library and demo app can help you do that.

References

Nerd stuff

From Chrome Bluetooth Devices

  • chrome://bluetooth-internals/#devices

Device Name: MI Matrix Display
Services:

  • 0000ffd0-0000-1000-8000-00805f9b34fb - Primary
  • Characteristics:
    • 0000ffd1-0000-1000-8000-00805f9b34fb - WriteWithoutResponse
    • 0000ffd2-0000-1000-8000-00805f9b34fb - Notify
      • Descriptors:
        • 00002902-0000-1000-8000-00805f9b34fb
  • 0000af30-0000-1000-8000-00805f9b34fb

Thanks

  • offe - Thank you for your protocol work and the tips on how to snoop on and analyze Bluetooth communication on Android.
  • Turbo - You are my sunshine. This project is dedicated to you.
  • Babe - I love you to the moon and back.
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

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Version Downloads Last Updated
2.0.0 56 9/8/2026