I think what you want is simply:
ws.on('message', function(msg) { LoopbackB.write(msg); }); LoopbackB.on('data',function(msg) { ws.send(msg); });
No function execution or anything.
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I think what you want is simply:
No function execution or anything.