Something like this, perhaps? https://hackaday.io/project/15711-raspberry-pi-stingray-detector https://hackaday.io/project/15711-raspberry-pi-stingray-dete...

Something like this, perhaps? https://hackaday.io/project/15711-raspberry-pi-stingray-detector https://hackaday.io/project/15711-raspberry-pi-stingray-dete... Looks like a pretty standard software defined radio reciever that profiles local cell towers so as to notice when a new, lower power (local) tower is put up, which you can then assume is some kind of stingray type device. Looks pretty easy to set up as well.