Send mqtt message when motion is detected (#3152)

* Send mqtt message when motion is detected

* Use object processing instead of passing mqtt client around

* Cleanup

* Formatting

* add comment

* Make off delay configurable.

* Handle updating each camera based on config off delay

* Formatting

* Update docker-compose.yml

* Fix processing issue

* Update mqtt docs

* Update main config docs

* Make sure multiple True values aren't published for the same motion

* Make sure multiple True values aren't published for the same motion

* Update payload to fit existing HA standard values

* Update docs to fit new values

* Update docs

* Update motion topic

* Use datetime.datetime and remove unused imports

* Cast to int

* Clarify motion detector behavior in docs

* Fix typo

Co-authored-by: Blake Blackshear <blakeb@blakeshome.com>

frigate/config.py

@@ -134,6 +134,10 @@ class MotionConfig(FrigateBaseModel):
     mask: Union[str, List[str]] = Field(
         default="", title="Coordinates polygon for the motion mask."
     )
+    mqtt_off_delay: int = Field(
+        default=30,
+        title="Delay for updating MQTT with no motion detected.",
+    )
 
 
 class RuntimeMotionConfig(MotionConfig):