Rebuild NETATMO Wind Sensor
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It measure it with four ultrasonic transducers that bounces their beam as you can see in this picture:

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@gohan Doppler ?
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the top above the transducers are plat and it says in the isntruction that you should avoid touching the area.
I have a broken outdoor sensor with temp, humid, Co2 and so on but there a very small ship on that one
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@gohan Its static
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@martin-tellblom Do you have any pics of the inside of the sensor? e.g. How the transducers are mounted?
Netatmo seem to be STM32 fanboys. Maybe you can reprogram them to run MySensors? ;-) -
There is a good one here
https://soldernerd.com/category/arduino-ultrasonic-anemometer/
And another one for a selfbuild like the Netatmo uses with bouncing -
@gohan Where I live we can't have one with moving parts, There is often over 35m/s in the winter storms.
Thats why I bought the Netatmo in the first place. But It's maybe better to build an own, I have a lot of the parts -
Here is a very good page explaining the two methods of ultrasonic anemometers.
http://www.dl1glh.de/ultrasonic-anemometer.html