LEDs-get-crazy Demo Payloads

Some demo payloads for the big LED matrix! Make the 1152 LEDs your own 🎨

PS: We switched to DNS ledsgc.luxeria.ch since WiFi was not stable enough and I printed stickers for the IP address three times now ...

Getting started

The protocol couldn't be simpler. The LED matrix listens for UDP packets on port 54321 and expects simple byte arrays. Each three bytes represent a single pixel (RGB). To illuminate the first pixel in red, simply send a UDP datagram consisting of \xff\x00\x00.

Let's turn on the first three pixels in red, green and blue:

echo -ne '\xff\x00\x00\x00\xff\x00\x00\x00\xff' | nc -u ledsgc.luxeria.ch 54321

Easy, right? Now let's get crazier and create some random noise:

cat /dev/urandom | nc -u ledsgc.luxeria.ch 54321

That was fun! But much more interesting things can be done with a little bit of structure. Python is the perfect tool for that. Let's start with a minimal example:

import socket
sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
sock.sendto(b'\xff\x00\x00\x00\xff\x00\x00\x00\xff', ('ledsgc.luxeria.ch', 54321))
sock.close()

What about some more pixels? Let's create a rainbow:

import socket
import colorsys

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
payload = b''
for i in range(1152):
    r, g, b = colorsys.hsv_to_rgb(i / 1152, 1, 1)
    payload += bytes([int(r * 255), int(g * 255), int(b * 255)])
sock.sendto(payload, ('ledsgc.luxeria.ch', 54321))
sock.close()

Just imagine the possibilities! 🌈

Take a look at some more python examples in this repo to get a hang, then create even cooler things 😎 Feel free to make a pull request with your own payload!

Offline Simulation

If you want to test your code offline before sending anything to the actual matrix, you may simulate it locally: https://github.com/nickik/ledsim

Credits for contributions

• webcam.py: Stream your webcam to the matrix. Thanks @rnestler! See https://github.com/rnestler/38c3-luxeria-led-python for more stuff.
• Simulator: Test your payloads locally. Thanks @nickik