Hello,
I have a problem with the integration of the NAD375 amplifier connected to Raspberry via a USB-RS232 converter.
I made changes to the configuration.yaml file according to the instructions on NAD - Home Assistant
After restarting Hassio, he receives the following error:
nad: Error on device update!
Traceback (most recent call last):
File “/usr/src/homeassistant/homeassistant/helpers/entity_platform.py”, line 322, in _async_add_entity
await entity.async_device_update(warning=False)
File “/usr/src/homeassistant/homeassistant/helpers/entity.py”, line 472, in async_device_update
await self.hass.async_add_executor_job(self.update)
File “/usr/local/lib/python3.7/concurrent/futures/thread.py”, line 57, in run
result = self.fn(*self.args, **self.kwargs)
File “/usr/src/homeassistant/homeassistant/components/nad/media_player.py”, line 200, in update
self._volume = self.calc_volume(self._nad_receiver.main_volume(“?”))
File “/usr/src/homeassistant/homeassistant/components/nad/media_player.py”, line 209, in calc_volume
return abs(self._min_volume - decibel) / abs(
TypeError: unsupported operand type(s) for -: ‘int’ and ‘NoneType’
Any suggestions?