I've been using that with quite a bit of success in automating my smart home as I move around it.
I've had success putting 18650 cells and then 3d printing cases for these: https://www.amazon.com/Makerfocus-Battery-Shield-Raspberry-A... Battery last long enough for peronal tracking around my house, but likely wouldn't be long enough to track the thing for multiple days in a row without a recharge.
For inventory you could use decawave, but it would be pricey.
You can find it discussed here https://www.microsoft.com/en-us/research/blog/path-guide-new...
.ac.cy is the Cyprus equivalent of .edu in the US. Or, more similarly, of .ac.uk in the UK.
ucy is University of Cyprus.
cs is their Computer Science department.
ap is Anyplace, the name of the app.
Edit: a word, and also this was on iOS.
Really nice to see that this area is still active and being worked on!
It would have worked waaaay better if we had some sort of surveying equipment to accurately capture each few steps of the cart.
Good for WiFi/IMU-based indoor (phone-based) position tracking, I believe. For more accuracy, especially for robotics, etc., Pozyx [1] claims resolution of "a few centimeters" (indoor rooms/outdoor) by using some custom trilateration circuitry, and then there are attempts to use VR (esp. Vive) methods [2], which are even better (albeit more limited range).
[1] https://www.pozyx.io/ [2] https://hackaday.com/2018/09/04/this-is-your-solution-for-op...
It is the Navigator Video on the far right column of the homepage.
