howdy i currently know of someone using maybe lorawlan or esp32, i know there’s many other devices with same capabilities. this individual is have modified the nodes to be well hidden and is able to listen and play any sound, like foot steps ppl taking even emergency sirens and having them in multiple places thought out the city, would think its encrypted radio, i know an sdr would be one way to get some sort of evidence the police don’t believe me, Ive tried rf detectors but soon a i turn it on its flooded with rf, like controlled rf preventing the chance to find the location, it even seems like they can be shut down remotely so its impossible to show anyone or get help, what i do know there is a lot of bluetooth around my location and wifi, one name i remember is zigbe, i seen this using wiggle wifi, i had i few hundred screen shots of the same devices at every place i go but police just wont do anything. i dont wanna spend the money on a sdr in case its the wrong one, not to mention my network is getting mitm attacks daily, im trying to get ideas how to deal with this or find someone near my location that has the gear to monitor remotely with out this attacker having any knowledge, the rf is between 920mhz to 922mhz. thanks any input will be veryful