small improvments to make the integration more stable

[hoffmann2002]

Hi,

i did a few changes to your code, to make it more stable/usable.

on detail:

• if a box is not online and HA is restarting then the entity is missing because on HA start the call request will fail and therefore the entity will never added. if the box is back online, a HA restart is neccecary to get the entity available again
  this is fixed: call request is now in a try/except block
• load_source was only called on HA start. this is. now trigged every time a box pwstate is changed from offline to online
  improvement
• async_update -> pwstate will prevent creation of entity. if box is unreachable, powerstate_soup.find('e2instandby').renderContents() is thrown an error.
  try/except block will handle this behavior

hope you have time to test the changes.

Thanks

[cinzas]

Hi @hoffmann2002 ,

Thanks a lot for you contributions.