Pozyx

‘indoor 3D positioning with centimeter accuracy.’

Positioning thingummy for the Arduino…

https://www.pozyx.io/store

“The pozyx system is a hardware solution that provides accurate positioning and motion information. The systems consists of 5 modules, of which 4 anchors and one tag. In order to achieve a positioning accuracy of a few centimeters, the pozyx system relies on a novel wireless radio technology called ultra-wideband (UWB). The accuracy achieved with this ultra-wideband technology is several times better than traditional positioning systems based on WiFi, bluetooth, RFID or GPS signals. Furthermore, the signals can penetrate walls and make it suitable for indoor environments.
Some things you can do with pozyx:
Let your robot or drone navigate safely inside your house.
Let the environment respond to your presence.
Measure any distance, even through walls!”