public function popCommand($device)
 {
     $record = $this->model->where('device_id', $device)->first();
     $commandToSend = null;
     if ($record) {
         $commands = explode(',', $record->queued_command);
         $commandToSend = array_shift($commands);
         $record->queued_command = implode(',', $commands);
         $record->save();
     }
     return $commandToSend;
 }
 /**
  * Display a listing of the resource.
  *
  * @return Response
  */
 public function index()
 {
     $devices = ACSNode::all();
     return view('devices.index', ['devices' => $devices]);
 }