When I started with my own SmartHome, one of my first projects was my own small weather station (Small insight here: https://hackaday.io/project/177868-solarsens-easy-3d-printable-solar-weatherstation) to monitor weather data.
Sensing the temperature, air pressure, air humidity and co was relatively easy. For example, with the BME280 you can record all values with just one sensor.
One problem that I couldn't solve until the end is how to record data about the wind, i.e. wind speed and direction. Of course, you can buy matching sensors. However, I always found them too expensive or big. If you wanted to use a compact sensor without taking up a lot of space, you almost always had to dig deep into your pocket.
That's why the decision to build my own compact wind sensor had long been made for me, but so far I haven't gotten to it.
For the construction of WinDIY_2 (https://hackaday.io/project/179999-windiy2-horizontal-axis-wind-turbine) I was faced with the problem again that I needed a cheap and compact wind sensor. That's why I started to develop my own. :)
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