This is a GT06 GPS Tracker message parser implementation, compatible with chinese TK306 tracker devices, GT06M firmware (and this command set: https://www.brotherinc.de/gps/gt06ab_de.pdf). It can be used to implement your own server. It parses all messages received from the device and creates the response message, if needed.
Shout out to Anton Holubenko because I've copied the initial version from him. repo/gt06n
const Gt06 = require('gt06');
const net = require('net');
var server = net.createServer((client) => {
var gt06 = new Gt06();
console.log('client connected');
client.on('data', (data) => {
try {
gt06.parse(data);
}
catch (e) {
console.log('err', e);
return;
}
if (gt06.expectsResponse) {
client.write(gt06.responseMsg);
}
gt06.msgBuffer.forEach(msg => {
console.log(msg);
});
gt06.clearMsgBuffer();
});
});
server.listen(serverPort, () => {
console.log('started server on port:', 4711);
});