(tl;dr version - the sniffer project is at this Github repo . Project is well documented there) For various reasons, I wanted to build a portable device to sniff WiFi and Bluetooth signals. My goals for the project were for the device to be able to: "Survey" all devices in the area, and log the results for later analysis Continuously monitor for target broadcasters based on: WiFi SSID WiFi MAC prefix (Manufacturer's OUI) Bluetooth device name Bluetooth MAC prefix (Manufacturer's OUI) Bluetooth service UUID value Log detection for analysis Signal detection in an obvious way Have GPS to keep track of geographic location (as well as timekeeping) I found a couple of projects on Github that looked kind of promising, but not exactly what I was looking for. One seemed a bit more promising than the others at first glance. The project developer was happy to sell pre-built hardware (with a buzzer for alerts), but could run on just an ESP32 dev board....
Adventures of a greybeard engineer turned white hat hacker