Air Velocity Sensor Breakout - FS3000-1015 Measurement error

Sensors
1

Hi, I am using the air velocity sensor with the Crazyflie drone framework, which supports 3.3V systems. During the measurements, even if my reference sensor reads around 8 m/s, the air velocity sensor reads around 2 m/s, mostly with random readings of 4 m/s. I’m wondering if the sensor is damaged or has power issues. I’m glad if anyone has thoughts on this.

Thanks in advance

2

I can see this product is retired. Did you buy it recently? Anyway, did you try the example code here? Air Velocity Sensor Breakout - FS3000 Hookup Guide - SparkFun Learn or you wrote your own code. If your code is written by you, I’d suggest trying the same code that is given in the hook-up guide. Make sure you uncomment this line.

fs.setRange(AIRFLOW_RANGE_15_MPS);

And this should be commented because you are using the 1015 version, not 1005.

//fs.setRange(AIRFLOW_RANGE_7_MPS);
3

Those are very sensitive to mounting considerations…share a photo of how it is being used if you can (my first guess is nearby propeller turbulence or other structures disrupting clean flow to its inlet)

5

20260512_130835
20260512_1308351920×1081 275 KB

6

The mounting looks alright, though the underside might obstruct some

What was the reference?

Can you share some photos of the soldering? I can kind of see them but not really

7

My reference is a hot wire anemometer from Testo (https://www.testo.com/de-DE/testo-440-hitzdraht-set/p/0563-4400#tab-technicalData)

Here are my solderings

20260512_171545
20260512_1715451920×3410 871 KB

8

Now I’m suspecting the wiring/soldering; you’ll almost always run into issues without headers/solid connections in the PTH holes…the hookup wire crossing/doubling over itself is also likely to cause problems (due to wiggles/vibrations, the enamel will scrape itself off and short on the others)

9

Try testing the sensor with the drone off. Does it work then?