Proximity Sensing

Device based technologies

• Bluetooth
• Wifi (ie. CreepyDOL)
• Cellular

Passive technologies

• Time of Flight (PIR/ultrasonic)
• Vision
• 3D stereo vision (Kinect)

PIR

• PIR tutorial

Wifi and bluetooth

• kismet
• bluez linux bluetooth protocal
• pi as network access point

Links to check out

• https://null-byte.wonderhowto.com/how-to/track-wi-fi-devices-connect-them-using-probequest-0186137/
• https://thepi.io/how-to-use-your-raspberry-pi-as-a-wireless-access-point/
• https://www.crc.id.au/tracking-people-via-wifi-even-when-not-connected/
• https://github.com/curtbraz/whoshere
• https://www.kismetwireless.net/docs/readme_group.html
• https://askubuntu.com/questions/969198/how-to-view-connections-on-ubuntus-hotspot-access-point
• https://www.pcsuggest.com/linux-bluetooth-setup-hcitool-bluez/