As I love paragliding, I decided to build my own variometer, as most of them are very expensive. I needed something easy to interface, and I found a simple way to interface with kobo, and smartphones. You can connect it via bluetooth or wired, sending the informations to a serial port. it has it’s own…
![](https://www.thepiper.eu/pr/wp-content/uploads/2015/12/FDNEG2BIHZ6TAOT.LARGE_-e1449740553699-840x410.jpg)