ICM-20948 orientation issue

By rdsupersystemscoin , 13 April 2020

Hi,
I am using eMD_ICM20648_20948_v1_3 software for application. I enable orientation feature and noticed heading and pitch are drifting a lot when roll ~90 degree.
Please find the attached logs.

Orientation 194.46507, -20.55745, 89.16969, 12
Orientation 194.58221, -20.62740, 89.16969, 22
Orientation 194.61543, -20.61166, 89.17668, 22
Orientation 194.91093, -21.01207, 89.20467, 12
Orientation 195.99678, -21.90382, 89.26761, 22
Orientation 197.78552, -23.81671, 89.32356, 22
Orientation 199.83305, -25.86075, 89.37253, 12
Orientation 204.20438, -30.24255, 89.45645, 22
Orientation 216.32516, -42.40706, 89.59633, 22
Orientation 244.18446, -70.71049, 89.70824, 12
Orientation 283.13818, -109.38445, 89.70824, 22
Orientation 307.57562, -133.74493, 89.61032, 22
Orientation 318.41998, -144.70122, 89.50540, 12
Orientation 324.08173, -150.38568, 89.43547, 22
Orientation 324.42969, -150.79485, 89.42847, 12
Orientation 320.81024, -147.05124, 89.47743, 22
Orientation 317.07538, -143.47200, 89.52640, 22
Orientation 312.86493, -139.25455, 89.57535, 12
Orientation 307.86588, -134.11388, 89.61032, 22
Orientation 300.23706, -126.58296, 89.65228, 22
Orientation 284.19257, -110.44055, 89.70824, 12
Orientation 256.37872, -82.88200, 89.70824, 22
Orientation 225.74449, -51.92256, 89.62431, 22
Orientation 205.00870, -31.17102, 89.43547, 12

Thanks,
Rahul

rdsupersystemscoin

5 years 11 months ago

Is there any difference between eMD_ICM20648_20948_v1_3 and eMD-SmartMotion-ICM20948-1.1.0-MP software?
Which one should I use ?

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sylareau

5 years 5 months ago

You have to wave your sensor in a figure 8 motions for about 30 sec to calibrate the sensor compass. Proper bias are then calculated. You can read them and reload them at next ICM start to avoid redoing that processus.

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