Hacker News new | ask | show | jobs
by uep 2156 days ago
Phone barometers can be used to get a pretty good idea which floor of a building you're on.

https://www.popsci.com/gadgets/article/2011-10/so-um-why-doe...

https://www.engadget.com/2012-09-06-stmicroelectronics-detai...