update old post about rtl_433 with actual frequencies

content/posts/2023/49-observe-your-neighbours-weather-stations/index.md

@@ -4,7 +4,7 @@ aliases = '/posts/2023-07-30-observe-your-neighbours-weather-stations'
 summary = '''Another simple and short snippet for *rtl_433*
 on Linux (and probably FreeBSD).'''
 date = '2023-07-30T09:10:10+02:00'
-lastmod = '2023-11-18T21:58:00+0000'
+lastmod = '2024-03-12T05:04:15+0000'
 categories = [ 'amateur-radio', 'computerstuff' ]
 tags = [ 'linux', 'freebsd', 'sdr', 'wx' ]
 
@@ -28,6 +28,10 @@ Then we should be able to run the program like this:
 $ rtl_433 -C si -M hires -M level -M stats -Y auto
 ```
 
+This will look per default on 433.29 MHz, other available frequencies are 315, 345,
+868 and 915 MHz. To listen on other frequencies add `-f 868M` to the command above
+for example.
+
 I've installed this on a laptop running Ubuntu.
 
 ![Preview](preview.png "A preview image showing some test entries basically from an old weather station.")