diff --git a/avro/CollectorUpdate.avsc b/avro/CollectorUpdate.avsc
new file mode 100644
--- /dev/null
+++ b/avro/CollectorUpdate.avsc
@@ -0,0 +1,32 @@
+{
+    "namespace": "light9",
+    "type": "record",
+    "name": "CollectorUpdate",
+    "fields": [
+        {
+            "name": "OutputAttrsSet",
+            "type": {
+                "type": "record",
+                "name": "_OutputAttrsSetValue",
+                "fields": [
+                    { "name": "dev", "type": "string" },
+                    {
+                        "name": "attrs",
+                        "type": {
+                            "type": "array",
+                            "items": {
+                                "type": "record",
+                                "name": "Attribute",
+                                "fields": [
+                                    { "name": "attr", "type": "string" },
+                                    { "name": "val", "type": "int" },
+                                    { "name": "chan", "type": "string" }
+                                ]
+                            }
+                        }
+                    }
+                ]
+            }
+        }
+    ]
+}
\ No newline at end of file