System.setDebugMask(9);
var url = CF.widget("Kodi_aURL","Kodi_PARAMETERS").label;
var buffer = "";
var CR = "\x0d";
var rdata, socket;
function onSocketConnect() {
};
function onSocketData() {
var temp,first;
buffer+=socket.read();
first = buffer.indexOf(CR);
while (first >= 0) {
temp = buffer.substring(0, first);
buffer = buffer.substring(first + 1);
notifyMessageReceived(temp);
first = buffer.indexOf(CR);
};
};
function onSocketIOError(e) {
System.print("sock IO Error error:" + e);
};
function notifyMessageReceived(message) {
System.print("Received:");
System.print(message);
};
function closeSocket() {
if (socket) {
if (socket.connected) socket.close;
socket = null;
};
};
function resetSocket() {
closeSocket();
socket = new TCPSocket(false);
buffer = "";
socket.onConnect = onSocketConnect;
socket.onData = onSocketData;
socket.onIOError = onSocketIOError;
};
function kodi(command) {
if (socket) socket.write("jsonrpc?" + command + CR);
};
resetSocket();
socket.connect(url,9090, 500);

Use System.print and try/catch to better understand the behavior.

I'd also consider adding a callback for socket.onClose as I bet that the server is closing the socket remotely. If that is the case, then you will need to call resetSocket() and connectSocket() after some time when this occurs.

[Link: remotecentral.com]

I'm close to throwing in the towel with these, now that I can program Control4 and URL, I got my hands on an old Control4 NEO remote, that's been my go-to remote for now.