code: async function devices(showAll, jsonOutput){
      
      try{
          const serialDevices = await _nodeMcuConnector.listDevices(showAll);
  
          if (jsonOutput){
              writeOutput(JSON.stringify(serialDevices));
          }else{
              // just show complete message
              if (serialDevices.length == 0){
                  _mculogger.error('No Connected Devices found | Total: ' + serialDevices.length);
  
              }else{
                  _mculogger.log('Connected Devices | Total: ' + serialDevices.length);
      
                  // print fileinfo
                  serialDevices.forEach(function(device){
                      _mculogger.log('- ' + device.comName + ' (' + device.manufacturer + ', ' + device.pnpId + ')');
                  });
              }
          }
      }catch(e){
          _mculogger.alert('Cannot retrieve serial device list - ');
          _logger.debug(e);
      }
  }
docs: show serial devices connected to the system