code: def print_devices_change_callback(devices, key, new):
      
      dev = devices[key]
      print('- ', new, ' ', dev)
      if dev['type'] == QSType.unknown:
          print(" ERR decoding")
      elif dev['value'] == -1:
          dev(" ERR decoding: -1?")
      qcord = pyqwikswitch.decode_qwikcord(dev['data'][pyqwikswitch.QS_VALUE])
      if qcord is not None:
          print(' qwikcord (CTAVG, CTsum) = ' + str(qcord))
docs: Print the reply from &devices() and highlight errors.