Modified test2.js from @mrose17

gistfile1.js

var noble = require('noble');

var main = function() {
  noble.on('stateChange', function(state) {
    console.log('stateChange: ' + state);

    if (state === 'poweredOn') noble.startScanning(); else noble.stopScanning();
  });

  noble.on('peripheralDiscover', function(peripheral) {
    if (!!peripheral) peripheral_init(peripheral); else console.log('null peripheral');
  });
};

var peripheral_init = function(peripheral) {
  var ble = {};

  peripheral.on('connect', function() {
    console.log('peripheralConnect: ' + peripheral.uuid);
    peripheral.updateRssi();
  });

  peripheral.on('disconnect', function() {
    console.log('peripheralDisconnect: ' + peripheral.uuid);
    console.log(JSON.stringify(ble));
  });

  peripheral.on('rssiUpdate', function(rssi) {
    console.log('peripheralRssiUpdate: ' + rssi);
    peripheral.discoverServices();
  });

  peripheral.on('servicesDiscover', function(services) {
    var i, s;

    // var includedServicesDiscover = function(includedServiceUuids) {
    //   console.log('includedServiceUuids'); console.log(includedServiceUuids); console.log('+++');
    //   this.discoverCharacteristics();
    // };

    var characteristicsDiscover = function(characteristics) {
      // return function(characteristics) {
        var c, j;

        for (j = 0; j < characteristics.length; j++) {
          c = characteristics[j];

          console.log(c.uuid);

          // service.characteristics[c.uuid] = { properties: c.properties, descriptors: {} };
          // c.on('descriptorsDiscover', descriptorsDiscover(service.characteristics[c.uuid]));
          // c.discoverDescriptors();
        }
      // };
    };

    // var descriptorsDiscover = function(characteristic) {
    //   return function(descriptors) {
    //     var d, k;

    //     for (k = 0; k < descriptors.length; k++) {
    //       d = descriptors[k];
    //       characteristic.descriptors[d.uuid] = { properties : d.properties, descriptors: d.descriptors };
    //     }
    //   };
    // };

    for (i = 0; i < services.length; i++) {
      s = services[i];
      if (!s.uuid) continue;

      ble[s.uuid] = { includedServiceUuids: {}, characteristics: {} };
      //s.on('includedServicesDiscover', includedServicesDiscover);
      s.on('characteristicsDiscover', characteristicsDiscover);

      //s.discoverIncludedServices();
      s.discoverCharacteristics();
    }
  });

  peripheral.connect();
};

main();