Location tracking

It's still working without the println. It seems very stable...

But yes, if I add the Bluetooth.println it prints a solid wall of text and starts locking up after a while. Even this does it:

NRF.setScan(function(device) {
  Bluetooth.println(JSON.stringify(device)­);
});

but if I throttle it down enough, it doesn't do it:

var n=0;
NRF.setScan(function(device) {
  n++;
  if (n&15) return;
  Bluetooth.println(JSON.stringify(device)­);
});

When printing fast and connected by serial, I seem to be able to get out of memory errors as well - which will be due to all the advertising packets queuing up in memory and not being handled fast enough.

Honestly, I'm not sure there's much I can do. Bluetooth LE can only transmit data so fast. If you're printing data faster than it can be output, something has to give.

I'll file a bug for the subsequent crash and will try and sort that out - but even if that's fixed, your code isn't going to work with the print statements in it like that.