📝 Update README

README.md

@@ -7,18 +7,23 @@
     <a href="LICENSE"><img src="https://img.shields.io/github/license/hemtjanst/trafikvader" alt="License: Apache-2"></a>
 </p>
 
-The trafikväder daemon exposes air temperature and relative humidity data from
-a weather station as Hemtjänst sensors.
+The trafikväder daemon exposes air temperature, relative humidity and
+precipitation from a weather station as Hemtjänst sensors.
 
 ## Usage
 
+In order to get station names, go to
+https://www.trafikverket.se/trafikinformation/vag. Enable `Vägväder` in the
+sidebar and click on your station. A card will pop up with information and in its
+header you'll find the name. Copy that value and pass it verbatim to `-name`.
+
 ```
 Usage of trafikvader:
 
 Parameters:
 
-  -id value
-    	station ID to query for, needs to be passed at least 1 time
+  -name value
+    	station name to query for, needs to be passed at least 1 time
 [..]
   -token string
     	Trafikinfo API token (default "REQUIRED")