wtf is seedlink_zejfseis?

Seedlink_ZejfSeis is a small background program, called a daemon, that connects two pieces of seismograph software together. It bridges SeedLink, a common protocol used by earthquake monitoring stations to distribute live seismic data, with ZejfSeis, a desktop application that shows real-time earthquake waveform charts. Without this bridge, ZejfSeis cannot understand SeedLink data directly, so this program translates between the two. The program connects to a remote SeedLink server as a client, following a specific handshake sequence of commands, then continuously reads incoming data packets called MiniSEED records, which contain the raw seismic sensor readings. It decodes those records using a library called libmseed and converts them into the format ZejfSeis expects, then serves that data over its own small network server so that ZejfSeis, or multiple copies of it, can connect and display the waveform live. It also sends periodic heartbeat messages to keep those connections alive, and automatically reconnects if the upstream SeedLink server drops the connection. It is written in C and built with a standard C compiler, requiring the libmseed library for decoding along with basic threading support. Configuration, such as which SeedLink server, station, and channel to connect to, and which port to listen on for ZejfSeis clients, is stored in a JSON file rather than hardcoded, so it can be changed without recompiling the program. It has been tested on Ubuntu Linux and is designed to run continuously, either as a system service or inside a terminal session. This tool is aimed at hobbyists and enthusiasts running their own seismograph setups who want to visualize live earthquake data in ZejfSeis using data pulled from a SeedLink-compatible source.