add dashboard screenshot

README.md

@@ -2,6 +2,10 @@
 
 *NOAA space weather data in Home Assistant.*
 
-This project consists of an external MQTT server, a custom component, and custom dashboard cards. Works well with [tcarwash/home-assistant_noaa-space-weather](https://github.com/tcarwash/home-assistant_noaa-space-weather).
+This project consists of an external MQTT feeder, a custom component, and custom dashboard cards. Works well with [tcarwash/home-assistant_noaa-space-weather](https://github.com/tcarwash/home-assistant_noaa-space-weather).
 
 Individual components have their own README files.
+
+<br><br>
+
+![example dashboard](dashboard/dashboard.png)

dashboard/README.md

@@ -15,3 +15,36 @@ type: space-weather-current
 type: space-weather-prediction-1day
 type: space-weather-24hr-max
 ```
+
+## Example VTEC Graph
+
+In the example dashboard seen in `dashboard.png`, the VTEC graph uses components from [mini-graph-card](https://github.com/kalkih/mini-graph-card). Use the following definition:
+
+```yaml
+type: custom:mini-graph-card
+entities:
+  - entity: sensor.space_weather_vtec
+color_thresholds:
+  - value: 0
+    color: '#030586'
+  - value: 10
+    color: '#0506e6'
+  - value: 20
+    color: '#004efd'
+  - value: 30
+    color: '#00b5fd'
+  - value: 40
+    color: '#14fde7'
+  - value: 50
+    color: '#6ffd8d'
+  - value: 60
+    color: '#e9fc13'
+  - value: 70
+    color: '#fbaf03'
+  - value: 80
+    color: '#fb4801'
+  - value: 90
+    color: '#da0302'
+  - value: 100
+    color: '#750305'
+```