MEMS (sensors)

I want to know correct degree and direction using lis2dh12 and lis3mdl.

when hand held device is flat i get roll and pitch degree -2 and +2. during pitch measurement :moving upwards from a flat level front , and then i get -90 degree.moving flat level from upward i get -2 degree. moving downward from a flat level, and th...

VL53L1X on LPC804 stuck in "while(state)"

Hi, I hope you can help me with this one. My problem is on line 127 I'm making an array of structs. i would like to make them global, but if I move line 127 to line 74 (Where my courser is) I get stuck in the while(state) on line 94. Why can't I make...

LSM6DSL Absolute Wrist Tilt(AWT) false positives

Hi,I'm using the LSM6DSL AWT to get interrupts in Y-axis when the angle goes above or below the thresholds. The problem is when happens one change of directions the LSM6DSL gives a false positive interrupt. The sensor detects the horizontal movement ...

How to get PDM data to SAI from STM32WB55 and convert it to a PCM signal?

Hi, I have a problem with an audio application on the STM32WB55 board. I would like to receive data from a digital microphone over the SAI inferface. I setup the Clock for this interface to 3.09MHz. After that I receive Data over the interface by pol...

LIS3MDL deviates from stable magnetic values ad hoc all of a sudden

We are using LIS3MDL in our product to detect cars. Most of the times the magnetic field values are stable. We are using adaptive baselining to derive the baseline field. However we have observed that on an ad hoc basis the magnetic field values sudd...

Calculating CLK dividers for MEMS microphones, SAI implemented through BSP for correct input audio

Hello,​I am using the BSP resources (stm32746g_discovery_audio) in order to get input audio from the MEMS digital microphones. The ingoing audio quality is good but it sounds like the signal itself is pitch-raised. Voices speaking sound like chipmunk...

Hi, I should need to know the Accuracy for the acceleration ang angular velocity measurement of the LSM9DS1 Thank you in advance, Bests, Nico

How to synchronise MEMS data & Audio data in controller side.

Hi, I'm using the STM32 temperature and turbidity sensor, and I want to know that, what binary representation the sensor would output for 98.23% humidity and what binary representation the sensor would output for 107.32 deg C.

I looked into the user manual, but don't really know how to calculate that. I'd really appreciate it if someone could give me some clue on that