Board disconnect event

[robtarr]

It would be great if there was some way to tell if the board has stopped responding. Be it due to failure, power, disconnect, etc. I don't need to know why, just that it's no longer connected. Similar to rwaldron/johnny-five#1037.

[rwaldron]

I'm travelling right now—can you take a run at this? After this: https://github.com/rwaldron/particle-io/blob/master/lib/particle.js#L310-L317, I think you'd add:

state.socket.on("close", function() {
  particle.emit("disconnect");
});

...But that's a completely untested guess.

[robtarr]

I'll take a look. Thanks for the direction.

[anwarhamr]

Any status on this? I've tried the .on('close',...) and I'm not getting a message when I pull the plug. Does the REPL option matter in the ctor? I'm setting repl: false.