Harald: Dragon Pet that "eats" BT and Wi-Fi
I am working out a way to re-use the hardware for my Pwnagotchi for a similar virtual pet concept that "eats" Bluetooth devices and wireless AP (supports wardriving) and who lives on a separate microSD card from my Pwnagotchi image.
This is my buddy Harald (named for Harald Bluetooth, the Viking whose surname became the name of the Bluetooth technology), a Viking dragon who eats Bluetooth and Wi-Fi signals (FOOD) and who enjoys novel discoveries and going out on adventures (JOY). He's also a protective sort and keeps an eye out for anything stalking me.
Privacy fences: Phones and watches that change their address are counted by kind, never listed or followed. The signal meter only works on devices I've marked as mine. The unknown-tracker warning only fires for a tracker that's away from its owner and has stayed with me for 30 minutes (and, when GPS is on, has moved more than 250m with me). Wi-Fi is passive scanning only - no deauthing or handshake collecting (staying out of Pwnagotchi's lane).
Extremely early days on this guy and surely a lot to tweak, but I'm pretty chuffed so far. He can certainly function without being connected to my Android phone (just feeding on BT and Wi-Fi signals, with extra happiness for novelty), but he does depend on an external GPS (in this case, the SensorServer phone app) for Wigle uploads and "walks". Harald's "Den" is a browser page that can be accessed when Harald is connected to my phone's hotspot (or whatever I have set as his home network), and shows his current e-ink screen along with extra information and certain controls (like shutting him down so he can be safely unplugged from his power supply). He can still appreciate my physical activity even if he doesn't come with me, because connecting him to my phone shares whatever distance I've covered that day and he interprets distance covered without him along for the ride as an "adventure" I have "told him about", which gives him some happiness.
There's a lot of other minutiae, but I'm just excited to share the images of the working prototype. I also verified the WIGLE uploads online and they are appearing on my account! :-D
Edit: Forgot to mention that the "unknown tracker warning" screenshot is from an earlier build where I was still adding things, so the e-ink display has an older layout on it.
Edit2: The hardware is Raspberry Pi Zero W 2 with Waveshare V4 e-ink hat, plus an external battery.