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OpenCPN pypilot plugin disconnected
In my first posts, I was on a system that had previously pypilot from openplotter. (that would explain why ~/.pypilot already existed). 

Now for testing purpose I'm on a "clean" system, just cloned and python3 install... 

Creating the ~/.pypilot folder worked, pypilot can now run. 
The connection to OpenCPN plugin works perfectly. 
But in the calibration GUI, the data only refreshes at 1 delta per second (either in accelerometers or compass). Sometimes, multiple red dots will be created at the refresh if the IMU is moved enough in 1s.
Maybe not related, but when I try to calibrate, the points are way out of the globe, which isn't the case with the 2.1.1 version...  
Leveling the boat works without issue (in a few seconds)

pypilot_client -c imu.rate   says 20/second 
pypilot_client -c imu.gyro  produces a lot of output per second (possibly 20) 

The compass value in pypilot & signalk is updated very rapidly, probably 20 times per second

after running pypilot_web, the web client (localhost:8000) works also well, with heading/pitch/roll updating rapidly.
Calibration is not available immediately, it takes some time to load, could this be a potential issue?

It seems like it is getting the data at 20 updates per second.

Now, it may have something to do with open gl drivers? I typically run the pypilot_calibration script on a remote host which is not a pi.

Can you go to the pypilot website (localhost:8000) and in calibration, click on the calibration plot link. See if the web version of calibration works any better. You should also be able to perform calibration from the opencpn plugin as well. Also, check the console of pypilot_calibration for errors. If possible, try these from a different machine too.

Thanks for taking the time to do this, you have uncovered a few small glitches which are now corrected in git. It would be good to find an explanation for the last problem with calibration. I will try to reproduce it as well from a fresh openplotter image.

As for points way out of the globe, likely it just is not calibrated yet. It is hard to say. It can vary widely with changes in position from magnetic objects as well. I will try to reproduce your result from the image.

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