update readme with original work and grafana link

README.md

@@ -1,5 +1,12 @@
 # tplink-plug-exporter
 
+Export TP-Link Smart Plug metrics to grafana dashboard
+
+## Grafana dashboard
+
+Search for `Kasa` inside grafana or install from https://grafana.com/grafana/dashboards/10957
+![img](https://grafana.com/api/dashboards/10957/images/6954/image)
+
 ## Sample prometheus config
 
 ```yaml
@@ -8,6 +15,7 @@ scrape_configs:
   - job_name: 'kasa'
     static_configs:
     - targets:
+      # IP of your smart plugs
       - 192.168.0.233
       - 192.168.0.234
     metrics_path: /scrape
@@ -17,11 +25,17 @@ scrape_configs:
       - source_labels: [__param_target]
         target_label: instance
       - target_label: __address__
+        # IP of the exporter
         replacement: localhost:9233
 
 # scrape kasa_exporter itself
   - job_name: 'kasa_exporter'
     static_configs:
       - targets:
+        # IP of the exporter
         - localhost:9233
-```
+```
+
+## See also
+
+- Original reverse engineering work: https://github.com/softScheck/tplink-smartplug