Puck.js whitelisting failure

There was a post here last week where someone hit something that might be similar.

You could try:

devices = [];
NRF.on('connect',function(addr) {
  devices.push(addr);
});
// now connect a few times and see what's in 'devices' using the left-hand side

On some Android phones there's a 'security feature' which basically randomises the Mac address every time the device connects, which means that the whitelisting is basically useless. It's possible it's the problem - but the above code might help.

Your other option is to install a 'cutting edge' Espruino firmware and enable 'passkey' pairing: http://forum.espruino.com/conversations/330007/#14600298

Because it's not in the 2v01 firmware it's not documented in that Security page yet, but it might do what you need?