Appending a new chat message to the time series topic. Using a JSON event to represent messages allows us to add extra metadata about the sender.

gistfile1.txt

var sendTextMessage = function(session){
    var input = $("#chatinput").val();
    $("#chatinput").val('');
    if(session.isConnected() && (input.replace(/\s/g, '').length > 0)){
        var message = {
            origin: chatUserId,
            type: 'txtmsg',
            payload: input
        };
        session.timeseries.append(chatTopic, message);
    }
}