send_key does not work. Also HA ask to don’t use IO inside main thread

[a-x-]

media_player.play_media

entity_id: media_player.samsung_tv
"media_content_type": "send_key"
"media_content_id": "KEY_POWEROFF"

2020-10-31 00:42:08 WARNING (MainThread) [homeassistant.util.async_] Detected I/O inside the event loop. This is causing stability issues. Please report issue to the custom component author for samsungtv_qled doing I/O at custom_components/samsungtv_qled/samsungtvctl/samsungtvupnp.py, line 55: r = requests.get('http://{host}:8001/api/v2/applications/{value}'.format(host=self.host, value=self._app_list[app]), timeout=0.5)
2020-10-31 00:42:08 WARNING (MainThread) [homeassistant.util.async_] Detected I/O inside the event loop. This is causing stability issues. Please report issue to the custom component author for samsungtv_qled doing I/O at custom_components/samsungtv_qled/samsungtvctl/samsungtvupnp.py, line 55: r = requests.get('http://{host}:8001/api/v2/applications/{value}'.format(host=self.host, value=self._app_list[app]), timeout=0.5)
2020-10-31 00:42:08 ERROR (MainThread) [homeassistant.helpers.entity] Update for media_player.samsung_tv fails
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 278, in async_update_ha_state
    await self.async_device_update()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 471, in async_device_update
    await self.hass.async_add_executor_job(self.update)  # type: ignore
  File "/usr/local/lib/python3.8/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/util/__init__.py", line 239, in wrapper
    result = method(*args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/util/__init__.py", line 239, in wrapper
    result = method(*args, **kwargs)
  File "/config/custom_components/samsungtv_qled/media_player.py", line 282, in update
    self._ping_device()
  File "/config/custom_components/samsungtv_qled/media_player.py", line 254, in _ping_device
    self._smarttv.device_update()
  File "/config/custom_components/samsungtv_qled/samsungtvctl/smartthings.py", line 51, in device_update
    data = resp.json()
  File "/usr/local/lib/python3.8/site-packages/requests/models.py", line 898, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/simplejson/__init__.py", line 525, in loads
    return _default_decoder.decode(s)
  File "/usr/local/lib/python3.8/site-packages/simplejson/decoder.py", line 370, in decode
    obj, end = self.raw_decode(s)
  File "/usr/local/lib/python3.8/site-packages/simplejson/decoder.py", line 400, in raw_decode
    return self.scan_once(s, idx=_w(s, idx).end())
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
2020-10-31 00:42:10 ERROR (MainThread) [homeassistant] Error doing job: Task exception was never retrieved
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity_platform.py", line 592, in _update_entity_states
    await asyncio.gather(*tasks)
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 283, in async_update_ha_state
    self._async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 322, in _async_write_ha_state
    attr.update(self.state_attributes or {})
  File "/usr/src/homeassistant/homeassistant/components/media_player/__init__.py", line 809, in state_attributes
    value = getattr(self, attr)
  File "/usr/src/homeassistant/homeassistant/components/squeezebox/media_player.py", line 360, in media_duration
    return self._player.duration
  File "/usr/local/lib/python3.8/site-packages/pysqueezebox/player.py", line 105, in duration
    if self.current_track and "duration" in self.current_track:
  File "/usr/local/lib/python3.8/site-packages/pysqueezebox/player.py", line 165, in current_track
    return self._status["playlist_loop"][self.current_index]
TypeError: 'NoneType' object is not subscriptable
2020-10-31 00:42:10 ERROR (MainThread) [homeassistant.helpers.entity] Update for media_player.samsung_tv fails
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 278, in async_update_ha_state
    await self.async_device_update()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 471, in async_device_update
    await self.hass.async_add_executor_job(self.update)  # type: ignore
  File "/usr/local/lib/python3.8/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/util/__init__.py", line 239, in wrapper
    result = method(*args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/util/__init__.py", line 239, in wrapper
    result = method(*args, **kwargs)
  File "/config/custom_components/samsungtv_qled/media_player.py", line 282, in update
    self._ping_device()
  File "/config/custom_components/samsungtv_qled/media_player.py", line 254, in _ping_device
    self._smarttv.device_update()
  File "/config/custom_components/samsungtv_qled/samsungtvctl/smartthings.py", line 51, in device_update
    data = resp.json()
  File "/usr/local/lib/python3.8/site-packages/requests/models.py", line 898, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/simplejson/__init__.py", line 525, in loads
    return _default_decoder.decode(s)
  File "/usr/local/lib/python3.8/site-packages/simplejson/decoder.py", line 370, in decode
    obj, end = self.raw_decode(s)
  File "/usr/local/lib/python3.8/site-packages/simplejson/decoder.py", line 400, in raw_decode
    return self.scan_once(s, idx=_w(s, idx).end())
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
2020-10-31 00:42:18 ERROR (MainThread) [homeassistant.helpers.entity] Update for media_player.samsung_tv fails
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 278, in async_update_ha_state
    await self.async_device_update()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 471, in async_device_update
    await self.hass.async_add_executor_job(self.update)  # type: ignore
  File "/usr/local/lib/python3.8/concurrent/futures/thread.py", line 57, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/usr/src/homeassistant/homeassistant/util/__init__.py", line 239, in wrapper
    result = method(*args, **kwargs)
  File "/usr/src/homeassistant/homeassistant/util/__init__.py", line 239, in wrapper
    result = method(*args, **kwargs)
  File "/config/custom_components/samsungtv_qled/media_player.py", line 282, in update
    self._ping_device()
  File "/config/custom_components/samsungtv_qled/media_player.py", line 254, in _ping_device
    self._smarttv.device_update()
  File "/config/custom_components/samsungtv_qled/samsungtvctl/smartthings.py", line 51, in device_update
    data = resp.json()
  File "/usr/local/lib/python3.8/site-packages/requests/models.py", line 898, in json
    return complexjson.loads(self.text, **kwargs)
  File "/usr/local/lib/python3.8/site-packages/simplejson/__init__.py", line 525, in loads
    return _default_decoder.decode(s)
  File "/usr/local/lib/python3.8/site-packages/simplejson/decoder.py", line 370, in decode
    obj, end = self.raw_decode(s)
  File "/usr/local/lib/python3.8/site-packages/simplejson/decoder.py", line 400, in raw_decode
    return self.scan_once(s, idx=_w(s, idx).end())
simplejson.errors.JSONDecodeError: Expecting value: line 1 column 1 (char 0)