code: function getServiceNames(serviceUuid, uuid) {
      if (servicesLookup[serviceUuid]) {
        var serviceName = servicesLookup[serviceUuid].name;
        var characteristicName = servicesLookup[serviceUuid].characteristics[uuid].name;      
      }
  
      var info = serviceUuid;
      if (serviceName) { info += ' (' + serviceName + ')' };
      info +=' -> ' + uuid;
      if (characteristicName) { info += ' (' + characteristicName +' )' }
  
      return info;
  }
docs: return name of service and characteristic (as defined in input json file)