PuckJS and Espruino Hub and MQTT bridge

Used a second Puck to verify that JSON is valid

// Puck.js : { "a": "1", "b": 2 }
NRF.requestDevice({ filters: [ { id:"d9:c7:0b:0a:48:20 random"}]}).then(
  function(d) { 
   console.log(JSON.parse(String.fromCharCode.apply(null, d.manufacturerData)));
} );
/* output
=Promise: {  }
{
  "a": "1",
  "b": 2 }
*/