Error in Acceleration integration

[AnaRhisT94]

I'm getting the following error after moving the IMU:

python3 accel_integration.py
Starting Data Acquisition
Start Moving IMU...
Data Acquisition Stopped
Traceback (most recent call last):
  File "accel_integration.py", line 189, in <module>
    imu_integrator()
  File "accel_integration.py", line 128, in imu_integrator
    b_filt,a_filt = signal.butter(4,5,'low',fs=Fs_approx)
  File "/home/pi/imu_project/venv/lib/python3.7/site-packages/scipy/signal/filter_design.py", line 2957, in butter
    output=output, ftype='butter', fs=fs)
  File "/home/pi/imu_project/venv/lib/python3.7/site-packages/scipy/signal/filter_design.py", line 2423, in iirfilter
    "must be 0 < Wn < fs/2 (fs={} -> fs/2={})".format(fs, fs/2))
ValueError: Digital filter critical frequencies must be 0 < Wn < fs/2 (fs=6.0 -> fs/2=3.0)

Any idea why this happens?

[AnaRhisT94]

Solved it by turning off the magnetometer readings which slow my rpi zero. But still the integration fails. (posted in new issue)

[asciiscry3r]

Try to downgrade python libs

…

On Thu, Nov 4, 2021, 23:51 Ilan Aizelman ***@***.***> wrote: Solved it by turning off the magnetometer readings which slow my rpi zero. But still the integration fails. — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ATKKRNCUZWZZLLSHVERQ2ITUKL57LANCNFSM5HLSFO5Q> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.