Fix pjlink issue (#20510)

* Fix issue #16606

Some projectors do not respond to pjlink requests during a short period after the status changes or when its in standby, resulting in pypjlink2 throwing an error. This fix catches these errors. Furthermore, only the status 'on' and 'warm-up' is interpreted as switched on, because 'cooling' is actually a switched off status.

* Update pjlink.py

Improved error handling

* Update pjlink.py

Improved error handling

* Update pjlink.py

Clean up

homeassistant/components/media_player/pjlink.py

@@ -93,15 +93,31 @@ class PjLinkDevice(MediaPlayerDevice):
 
     def update(self):
         """Get the latest state from the device."""
+        from pypjlink.projector import ProjectorError
         with self.projector() as projector:
-            pwstate = projector.get_power()
+            try:
-            if pwstate == 'off':
+                pwstate = projector.get_power()
-                self._pwstate = STATE_OFF
+                if pwstate in ('on', 'warm-up'):
-            else:
+                    self._pwstate = STATE_ON
-                self._pwstate = STATE_ON
+                else:
-            self._muted = projector.get_mute()[1]
+                    self._pwstate = STATE_OFF
-            self._current_source = \
+                self._muted = projector.get_mute()[1]
-                format_input_source(*projector.get_input())
+                self._current_source = \
+                    format_input_source(*projector.get_input())
+            except KeyError as err:
+                if str(err) == "'OK'":
+                    self._pwstate = STATE_OFF
+                    self._muted = False
+                    self._current_source = None
+                else:
+                    raise
+            except ProjectorError as err:
+                if str(err) == 'unavailable time':
+                    self._pwstate = STATE_OFF
+                    self._muted = False
+                    self._current_source = None
+                else:
+                    raise
 
     @property
     def name(self):