M5STACK ESP32 Arduino
This radar app shows "covid trace" beacons transmitted around you. The circle distances from the centre are related to the strength of the received signals.
THESE ARE NOT infections but people that have the corona alert app installed. Also the visualisation is intended to look good not to show the location of other people.
Works with the standard BLE Arduino lib that is installed with Arduino 1.9.
Versions 2 and 3 other visualisations. I try to make it look as cool as possible :-)
Known issue for exposure_scanner2.ino and exposure_scanner3.ino: crash when receiving too much input.
exposure_scanner4.ino has less serial port monitoring, works better with lots of incomming packets (people around you).