.MPJ File Extension
UNO R4 WiFi LED Animation Project
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An MPJ file may also be a project file created by the Arduino LED Matrix Editor, an online tool used to create LED animations for the Arduino UNO R4 WiFi. It contains JSON-formatted data that describes an animation. Using the LED Matrix Editor, UNO R4 WiFi users can play the animation an MPJ file describes.
More Information
The Arduino UNO R4 WiFi is a 32-bit microprocessor that includes a 12 x 8 LED matrix. To program this matrix, users can either manually add animation frames to an Arduino sketch, or they can use Arduino's online LED Matrix Editor. After creating an animation in the LED Matrix Editor, users can send that animation to their Arduino UNO R4 WiFi.
Optionally, a user can save a copy of their LED Matrix Editor project as an MPJ file. This file is a JSON file that describes the animation a user has created, as a set of individual frames. Each frame's data begins with [{"matrix":.
The data an MPJ file contains is not what LED Matrix Editor sends to an UNO R4 WiFi to play an animation. (LED Matrix Editor converts the MPJ file's data to Arduino source code before sending it.) Thus, directly transferring an MPJ file to an UNO R4 WiFi will not allow you to play the animation it describes. Instead, you must open your MPJ file with LED Matrix Editor and then either:
- Use LED Matrix Editor to play your animation on your device
- Convert the animation into an .INO file
How to open an MPJ file
You can open an MPJ file with Arduino's online LED Matrix Editor, to view, edit, and play the LED sequence it contains. To do so, click the Upload button found in LED Matrix Editor's upper-right corner. Then, navigate to and open your MPJ file.
You can also open an MPJ file with Microsoft Visual Studio Code or any other text editor, to view and edit the JSON-formatted data it contains.
How to convert an MPJ file
You can use Arduino LED Matrix Editor to convert an MPJ file to an .INO (Arduino Sketch) file. To do so, click the button found in LED Matrix Editor's upper-right corner. LED Matrix Editor will then open a live preview of the resulting INO file. Click the Download button on this webpage's right side to download the INO file.