By default Linux ignores Broadcast and Multicast ICMP messages. That's why you need to enable it first:
sysctl -w net.ipv4.icmp_echo_ignore_broadcasts=0To join any mutlicast address (e.g. 224.10.10.10/24) just add it to your active interface (e.g. eth0) and append the keyword autojoin at the end:
Frame data is transferred inside packets (similar to DMX, for example). A frame is an image representing a matrix or a light scene.
The packets start and end with one-byte characters. In between are a few control bytes followed by the payload. There is no set size for a payload; it is transmitted with each packet. This makes the protocol quite flexible. There are enough bytes in a single packet for an RGB matrix with 21,845 pixels, but if you just want to control an RGBW lamp, that only requires 9 bytes. The variable frame size means there is no overhead, allowing for maximum transfer speed.
