Matrix/API

About

REST API to access the Raspberry PI RGB LED Matrix over HTTP.

How to run

Note: Once run, you should not simply kill the process. Graceful shutdown is work-in-progress.

• Attached mode:

  sudo python3 main.py
  

• Running as daemon:

  1. Create a system.d service file:

     [Unit]
     After=network.target
     
     [Service]
     Restart=always
     WorkingDirectory=/path/to/project
     ExecStart=/usr/bin/python3 /path/to/project/main.py
     
     [Install]
     WantedBy=multi-user.target
     

  2. Place file in /etc/systemd/system/

  3. Reload system.d daemon:

     sudo systemctl daemon-reload
     

  4. Enable and start service:

     sudo systemctl enable <filename>
     sudo systemctl start <filename>
     

Usage

Webserver

The script will host a waitress webserver on port 8080 of the machine it's running on.

Note: This webserver should never be exposed to the outside of the system it's running on, since it's meant to be combined with the provided SvelteKit webserver to serve a GUI. For this reason, please make sure you set up a firewall or other kinds of access rules to forbid any connections from outside of this machine (localhost).

GET Endpoints

• /clear: Clear the buffered canvas
• /update: Swap buffered canvas on VSync

POST Endpoints

Note: All POST Endpoints require to receive form data to function.

• /text: Display text on buffer
  • text: string
• /color: Specify a color to be used by dispaly methods
  • r: int
  • g: int
  • b: int
• /pixel: Set a single pixel on buffer
  • x: int
  • y: int
• /circle: Display a circle on buffer
  • x: int
  • y: int
  • r: int
• /rectangle: Display a rectangle on buffer
  • x: int
  • y: int
  • w: int
  • h: int

Flags and Arguments

You may need to specify all kinds of different flags or arguments to run the matrix correctly. For usage, please refer to any of the scripts, followed by the flag --help.

Example:

sudo python main.py --led-rows=64 --led-cols=64 --led-slowdown-gpio=5 --led-parallel=3 --led-chain=3 --led-gpio-mapping=regular