elmicha

There are also some SAT receivers that run Linux, see e.g. https://www.opena.tv/app.php/atv_images

What happens if you put “police your_city” in your favorite search engine? I tried it with my current city and the village where I grew up, and both led me to the phone number in reasonable time.

Does it have to be radio? Maybe infrared would be enough? You could use a TSOP 2438 as a receiver and any old IR remote.