Extend Sighthound documentation. (#17932)

* Extend Sighthound documentation.

* Address review comments

* Update source/_integrations/sighthound.markdown

Co-authored-by: Franck Nijhof <frenck@frenck.nl>

* Apply yaml style guide

* Apply suggestions from code review

Co-authored-by: Klaas Schoute <klaas_schoute@hotmail.com>

* Tweaks

Co-authored-by: Franck Nijhof <frenck@frenck.nl>
Co-authored-by: Klaas Schoute <klaas_schoute@hotmail.com>

source/_integrations/sighthound.markdown

@@ -63,3 +63,45 @@ source:
       required: false
       type: string
 {% endconfiguration %}
+
+To verify the integration, check if a new entity is appeared as `image_processing.sighthound_my_cam`
+
+## Process an Image
+
+When you want to process an image, you have to call `image_processing.scan` service and listen to the `sighthound.person_detected` and/or `sighthound.vehicle_detected` events.
+
+An example using two automations:
+
+- The first automation is triggered, when a motion is detected. It calls the `image_processing.scan` service to send the camera image to the sighthound server for processing.
+
+- The second automation is triggered by a `sighthound.vehicle_detected` event. It sends a notification to a phone.
+
+```yaml
+# Example automations.yaml entry
+- id: "SOME_UNIQUE_ID"
+  alias: "Entrance Motion Image Processing"
+  description: "Send a camera image to sighthound, when motion is detected at the entrance"
+  trigger:
+    - type: motion
+      platform: device
+      device_id: YOUR_DEVICE_ID
+      entity_id: binary_sensor.my_motion_sensor
+      domain: binary_sensor
+  action:
+    - service: image_processing.scan
+      target:
+        entity_id: image_processing.sighthound_my_cam
+  mode: single
+
+- id: "ANOTHER_UNIQUE_ID"
+  alias: "Arriving Vehicle Notification"
+  description: "Send a notification to a phone, when a vehicle is detected at the entrance"
+  trigger:
+    - platform: event
+      event_type: sighthound.vehicle_detected
+  action:
+    - service: notify.mobile_app_my_iphone
+      data:
+        message: "Somebody has just arrived by car."
+  mode: single
+```