Bluetooth connections with noble

[SvenSommer]

with the help of @dfuerst we were able to solve this issue by rebuilding electron with a special version:

sudo npm rebuild --runtime=electron --target=1.4.6 --disturl=https://atom.io/download/atom-shell --abi=50

[yawns]

Great. That’s what I was aiming for.

[SvenSommer]

So noble is working fine. I find all bluetooth devices as expected, as long it’s not running within the MM-framework.

It seems like noble isn’t able to power on the bluetooth adapter on the raspberry pi3 board when started by magicmirror.

Any ideas?

Here is a minimal example:

var noble = require('noble');

console.log('stateChange is: ' + noble.state);
noble.on('stateChange', function(state) {
  console.log('changed state to: ' + noble.state);
  if (state === 'poweredOn') {
    noble.startScanning();
  }else  {
    noble.stopScanning();
  }
});
console.log('stateChange is: ' + noble.state);

leeds to:

stateChange is: unknown
stateChange is: unknown

[dfuerst]

maybe using hcitool with the syntax for pairing a device before would solve this issue, have you tried that?
as far as i understand the rpi3 bluetooth is on, at startup, but you have to pair the devices every startup, unless you use hcitool with the corresponding syntax for direct pairing within your .js

[SvenSommer]

We were able to solve this issue by ruinning the MM² with sudo-right. See here for details.