handle missing channels in fixture definition

README.md

@@ -57,11 +57,18 @@ Handles the following DMX channels (coarse only for now)
 
 # Pan, Tilt and fixture modelling
 
-If fixtures are visible in the scene, you may wish to model the body of the fixture. Typically it would have a panning section, containing a tilting section with the lamp in it. If you parent the objects in this chain, you can select the parent or grandparent to be animated with pan and tilt.
+If fixtures are visible in the scene, you may wish to model the body of the
+fixture. Typically it would have a panning section, containing a tilting
+section with the lamp in it. If you parent the objects in this chain, you can
+select the parent or grandparent to be animated with pan and tilt.
 
-To use this method, select the light in Blender and select the Pan Target and Tilt Target. Select which axis of the light, its parent, or its grandparent to affect. You can also choose _none_, for example if the fixture has panning but no tilt motor.
+To use this method, select the light in Blender and select the Pan Target
+and Tilt Target. Select which axis of the light, its parent, or its
+grandparent to affect. You can also choose _Ignore_, for example if the
+fixture has panning but no tilt motor.
 
-Pan and tilt affect the delta rotation, so you can use the rotation transform to set the centre position of your fixture models. 
+Pan and tilt affect the rotation transform, so you can use the delta rotation
+transform to set the centre position of your fixture models. 
 
 # Future ideas
 
@@ -109,12 +116,14 @@ Gobos can be handled by [https://www.youtube.com/watch?v=Af-yLsRpF7I]
 Please submit a PR if you have an improvement.
 
 # Funding
-I'm not a professional lighting designer - this came out of a hobby project to control lighting for an event I worked on for a friend. So I have no personal value gained by working on improving it (unlike other open source software I work on), although it is rather fun. If lighting professionals see a value in this plugin I would be happy to be funded to work on it via Patreon.
+I'm not a professional lighting designer - this came out of a hobby project to control 
+lighting for an event I worked on for a friend. So I have no personal value gained by
+working on improving it (unlike other open source software I work on), although it is
+rather fun. If lighting professionals see a value in this plugin I would be happy to be
+funded to work on it.
 
 Alternatively, I would be very happy to accept high quality PRs to improve the plugin.
 
-# Funders
-
 Many thanks to the below companies and individuals who have funded me to work on this addon.
 
 * Skeldon Società Cooperativa, Italy

__init__.py

@@ -217,6 +217,6 @@ def _light_data_change(data, context):
     # apply the DMX data to get it up to date
     universes = GLOBAL_DATA["UniverseStore"]
     if old_universe is not None:
-        universes.notify_universe_change(old_universe)
+        universes.notify_universe_change(old_universe, range(0, 511))
     if data.artnet_enabled:
-        universes.notify_universe_change(data.artnet_universe)
+        universes.notify_universe_change(data.artnet_universe, range(0, 511))