docs: document "Priority" feature
Change-Id: If9ddb4d159b390fb6760a23e669911cb3b5cda15
Signed-off-by: Alexander Hansen <alexander.hansen@9elements.com>
diff --git a/README.md b/README.md
index 9319840..352f174 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,18 @@
The configuration can happen via json or yaml.
-## Configuration Example (JSON)
+### Configuration: LED Priority
+
+Each LED can have "Priority" as "Blink" or "On". If this property is defined, it
+should be defined on each instance of the LED in the config.
+
+When multiple LED groups are asserted and contain the same LED, "Priority"
+determines the state of the LED.
+
+For example, Group 1 says LED1 should be "Blink", and Group 2 says it should be
+"On". LED1 will then have the state declared in "Priority".
+
+### Configuration Example (JSON)
This is our configuration file. It describes 2 LEDs for the
'_enclosure_identify_' group, with their respective states and duty cycles.