add instructions for map on ha dashboard

feeder/README.md

@@ -1,4 +1,5 @@
-This is an MQTT sensor to send NOAA space weather data to Home Assistant. Fetching the data requires a login to NASA's EarthData which is done through Selenium and the Chrome browser.
+This is an MQTT sensor to send NOAA space weather data to Home Assistant. Fetching the data requires a login to NASA's
+EarthData which is done through Selenium and the Chrome browser.
 
 ## Install
 
@@ -37,11 +38,11 @@ Example systemd service files are provided.
 
 ```yaml
 mqtt:
-  - state_topic:         "space-weather/vtec"
-    name:                "VTEC"
+  - state_topic: "space-weather/vtec"
+    name: "VTEC"
     unit_of_measurement: "(10^16 el) / m^2"
-    state_class:         measurement
-    unique_id:           space_weather_vtec
+    state_class: measurement
+    unique_id: space_weather_vtec
 ```
 
 ## Data
@@ -57,3 +58,19 @@ vertically from the Earth's surface to the edge of the atmosphere. So essentiall
 difference lying in the specific path along which the measurement is taken.
 
 Updated hourly.
+
+## Home Assistant Dashboard
+
+### Global VTEC Map
+
+1. Enable the [Generic Camera](https://www.home-assistant.io/integrations/generic/) integration.
+2. Set the `Still Image URL` to `http://[server IP]:5000/global`
+3. Set the `Frame Rate (Hz)` to `0.0016666666666667` (sets it to a 10 minute refresh rate).
+4. Create this card on the dashboard:
+    ```yaml
+    type: picture-entity
+    entity: camera.[your entity name]
+    show_state: false
+    show_name: false
+    camera_view: auto
+    ```