MEMS Studio not working with ST1VAFE3BX

bwilkins · ‎2026-03-03

I've installed MEMS Studio v2.3.0 and trying to evaluate ST1VAFE3BX sensor -- in particular the vAFE ONLY operation in FIFO mode -- using the STEVAL-MKI109D evaluation board with STEVAL-MKI250KA evaluation kit plug-in module.

Previously I had MEMS Studio v2.2.0 installed and that was working. I've just updated to v2.3.0 and now the setup is not working.

- I did update the FW on the MKI109D board; MEMS Studio indicates "FW: 2.6.17".

- I see a tiny fraction of a second of data in the plot window, and then nothing.

- The pink "Run" button becomes grayed out/deactivated.

- Most options typically under the "Sensor Evaluation" panel disappear.

How do I use MEMS Studio to evaluate the ST1VAFE3BX sensor in "vAFE only" mode?

Federica Bossi · ‎2026-03-25

Hi @bwilkins ,

When FIFO evaluation mode is selected in MEMS Studio, the available sensor evaluation features are reduced. This includes a disabled Run button and fewer evaluation options. This is the expected behavior, and it is implemented in the same way in versions 2.2.0 and 2.3.0.

MEMS Studio currently supports only Accelerometer FIFO evaluation for the ST1VAFE3BX sensor. In general, we are not able to reproduce any behavioral differences between the mentioned application versions.

In order to provide further support, we would need to understand the exact use case: how you are using the application and where exactly you observe the problem in version 2.3.0, maybe sharing some screenshots would be helpful too.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

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Federica Bossi · ‎2026-03-25

Hi @bwilkins ,

When FIFO evaluation mode is selected in MEMS Studio, the available sensor evaluation features are reduced. This includes a disabled Run button and fewer evaluation options. This is the expected behavior, and it is implemented in the same way in versions 2.2.0 and 2.3.0.

MEMS Studio currently supports only Accelerometer FIFO evaluation for the ST1VAFE3BX sensor. In general, we are not able to reproduce any behavioral differences between the mentioned application versions.

In order to provide further support, we would need to understand the exact use case: how you are using the application and where exactly you observe the problem in version 2.3.0, maybe sharing some screenshots would be helpful too.

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

bwilkins · ‎2026-03-26

When FIFO evaluation mode is selected in MEMS Studio, the available sensor evaluation features are reduced. This includes a disabled Run button and fewer evaluation options. This is the expected behavior, and it is implemented in the same way in versions 2.2.0 and 2.3.0.
MEMS Studio currently supports only Accelerometer FIFO evaluation for the ST1VAFE3BX sensor.

@Federica Bossi Thank you for mentioning both these aspects. I did not realize the limits of FIFO support and so from my perspective it looked like I was encountering some trouble with the program.

It has been a few weeks since my original post; MEMS Studio has updated to v2.3.1 on my machine and testing with that confirms I'm seeing the expected behavior (disabled run button, etc.)

It has been even longer since I had tested with v2.2.0. I would say my recollection of that is not accurate and based on the new information is invalid.

This clears up some behavior and I realize now I must only use "Default Mode" to test the ST1VAFE3BX vAFE.

Unfortunately I'm still having trouble (in Default Mode) and the vAFE acquisition stops after a very short time. That is a separate issue I'm discussing with ST support and off-topic for this thread. I'll mark your post as the solution for the original issue.