Thingy91 - ADXL362 noise and range issue

RE: Thingy91 - ADXL362 noise and range issue

Huba — Thu, 05 Oct 2023 12:07:23 GMT

You were correct; running the accelerometer from the battery does result in improved accelerometer stability. I did a simple test by having the LED blink whenever a specific threshold was exceeded to confirm this.

RE: Thingy91 - ADXL362 noise and range issue

Kenneth — Thu, 05 Oct 2023 11:53:31 GMT

[quote user="Huba"]As per the datasheet, the Thingy91 features a 1MB flash and 256kB of RAM. Are you aware of any sample code or examples that demonstrate how to save accelerometer data using this device?[/quote]

Please make a new case for this, as I am not able to look into this at the moment.

Kenneth

RE: Thingy91 - ADXL362 noise and range issue

Huba — Thu, 05 Oct 2023 06:53:22 GMT

That's a valid observation regarding the power supply. I initially powered it via USB, but I'll experiment with running it on battery power instead. Consequently, I'll need to implement data storage to retain the information for later analysis in order to assess its stability.

As per the datasheet, the Thingy91 features a 1MB flash and 256kB of RAM. Are you aware of any sample code or examples that demonstrate how to save accelerometer data using this device?

RE: Thingy91 - ADXL362 noise and range issue

Kenneth — Wed, 04 Oct 2023 19:27:24 GMT

I would likely have checked with Analog Devices if they have any suggestion.

Looking at an old case some years back I can find some readings were shared, this at least show less variation than you share:
https://devzone.nordicsemi.com/f/nordic-q-a/69176/adxl362-calibration

I assume the surface the thingy is placed on is stable, so the other thing I would have checked then is the power supply; USB supplies are noisy, so running from battery during this test is likely a good idea (if you are not already).

Kenneth