OpenLog Artemis - extracting the quaternion data from ICM 20948

OpenLog Artemis - extracting the quaternion data from ICM 20948#220340

By aedge - Sun Nov 01, 2020 8:04 am

- Sun Nov 01, 2020 8:04 am #220340

Hi! I'm new to all of this but making some progress following online tutorials. I am connected to my OpenLog Artemis Dev-16832 using SPI (USB connected to com port) and i want to extract the raw quaternion data (w,x,y,z) from the ICM 20948. Is this possible? Also a general question: why doesn't the sensor manufacturer (invensense in this case) make it easier (for rookies like me) to find code that can access all the functionality of their product?

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220357

By PaulZC - Mon Nov 02, 2020 2:18 am

- Mon Nov 02, 2020 2:18 am #220357

Hi @aedge,
Sadly, the library does not currently support quaternions:
https://github.com/sparkfun/SparkFun_IC ... .h#L26-L29
but it is something we would like to add in the future. We have it on the "things-to-do" list:
https://github.com/sparkfun/OpenLog_Artemis/issues/47
Best wishes,
Paul

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220363

By aedge - Mon Nov 02, 2020 9:31 am

- Mon Nov 02, 2020 9:31 am #220363

Thank you for the quick response @PaulZC. Can you recommend another IMU sold by SParkFun that currently supports that functionality? or, do you anticipate the time to get that feature available is reasonably close, and worth the wait? Thanks again.

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220364

By PaulZC - Mon Nov 02, 2020 9:51 am

- Mon Nov 02, 2020 9:51 am #220364

Hi @aedge,
The BNO080 supports quaternions and Euler angles:
https://www.sparkfun.com/products/14686
Implementing them on the ICM is on the things-to-do list - but is some way from the top...
Best wishes,
Paul

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220365

By aedge - Mon Nov 02, 2020 9:52 am

- Mon Nov 02, 2020 9:52 am #220365

Got it, thanks!

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220381

By aedge - Mon Nov 02, 2020 5:41 pm

- Mon Nov 02, 2020 5:41 pm #220381

@PaulZC one more question - can i connect the BNO080 to the Openlogger ARtemis using Qwiic? or do i need to get another microcontroller? I'm coding using Arduino. Thank you!

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220389

By PaulZC - Tue Nov 03, 2020 12:49 am

- Tue Nov 03, 2020 12:49 am #220389

Hi @aedge,
Yes, you can connect it via Qwiic, but the standard OLA firmware does not support the BNO080 at the moment. It is on the things-to-do list but is nowhere near the top. You can either write your own code, or can add the BNO080 to the OLA firmware. There is a checklist of things to do here:
https://github.com/sparkfun/OpenLog_Art ... SENSORS.md
If it works, please send us a Pull Request!

Best wishes,
Paul

Re: OpenLog Artemis - extracting the quaternion data from ICM 20948#220395

By aedge - Tue Nov 03, 2020 8:57 am

- Tue Nov 03, 2020 8:57 am #220395

thanks Paul. I'll take on the challenge but don't hold your breath...i don't even know what a Pull Request is...i think i'll order the prescribed Redboard (Dev-13975) in the meantime.

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