Summary

Here is the first test of my Android Windmeter.
It works with two small magnets attached to the anemometer axis and rotating above the smartphone's magnetometer.
This produces a very small fluctuation of the magnetic field. When applying a fast fourier transform you can get the rotation speed.
Then the App allows to calibrate the speed using the GPS and display it on a gauge.

Well, see it into action :
https://www.youtube.com/watch?v=jA16slSEuuM

Print Settings

Printer Brand:

Prusa

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>i3 MK2S</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>200µm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>100% but could be less</p></div></p>

Windmeter for Android