MEMS and sensors

Hi.I'm working with the FSM in LSM6DSO. I'm able to program detection which I want, but I struggle to do something like "fail-safe" to avoid the algorithm to stuck in the middle of the detection.For example, I want to do a "throw" detection of a thing. The accelerometer is in the thing.I can simply wait for enough acceleration in -X (in my case it will be always in this axis), then wait for the "fly" of the thing, where simply I can use norm V, which must be almost 0, as it's almost free fall, and it must fly for some time.But I struggle to do some timeout to jump out of the fly detection, when there is no any, after e.g. 1s.The problem is, that I can't use 2 timers (there is only single TC), because from manual, every time when comparison is done, the TC is loaded automatically and even when setting SCTC1, it loads anyway when I do comparison of 2 different timers.Here is the example in the MEMS studio:

Hello,I'm trying to write to configuration register of P3T1750 sensor, I can perform this with I2C protocol but it not successfully with I3C, the sensor still ACK the write command but it NACK the read command to configuration register. With the temperature register i can read value with I3C.I just want to confirm that this is I3C/I2C sensor but the configureation register only r/w by I2C controller, right?

Hello,  I am trying to use a proteus1 to monitor temp and vibration on a spindle and i just cant seem to find the best way to do this. I would  like to use a cloud so I can monitor it off site and get a notification if the temp rises above a threshold. what would you recommend. I have tried the azur cloud i can get the device to connect but then in the classic app i can not get it to send any information. I have tried almost all firmware versions and just cant seem to crack this. Anything will help. Thank you,

We will design a layout for the VD55G1 Promodule with Image read out over I3C. Alternative there is also a VD55G4 camera with an additional SPI image read out. Is it possible to get the pin assignment for the new VD55G4 promodule ?

Hi everyone,I am struggling to get MotionFX (9-axis sensor fusion) working on an STM32L476G-DISCOVERY board using the onboard LSM303C (Acc/Mag) and L3GD20 (Gyro).The Problem: Despite the library being initialized and updated in the main loop, all outputs (data_out.rotation, quaternion) remain strictly at 0.0.Current Status & Observations:Hardware CRC: Enabled and verified. The CRC->DR register changes value constantly, proving that MotionFX_update is processing data.Timing: The loop is running at 100Hz. I've tested with both a calculated dt and a fixed dt = 0.01f, but the output remains zero.Input Data (data_in):Acc: ~1.0g on Z-axis when flat (normalized to g).Gyro: Normalized to dps (values around 0-5 dps at re

Hello,I have two technical questions regarding the lis3dh accelerometer behavior and interrupt configuration.1) Are the values I read from the LIS3dh  in m/s²????  Exemple :::Accel [LIS3dh] 28807220458ns (-7.300384, -1.942303, -5.712095)2) Interrupt logic (INT1_CFG :: XLIE / YLIE / ZLIE)When I configure an interrupt threshold, for example 5 m/s², and enable the axis event bits in INT1_CFG XLIE / YLIE / ZLIEDo the Low events correspond to the following type of comparison?X < threshold, Y < threshold, Z < thresholdOr do they correspond to:|X| < threshold, |Y| < threshold, |Z| < thresholdFor instance, if I have the following measured values and the interrupt threshold is set to 5 m/s²:Would this condition trigger an interrupt or not, according to the configured AOI ,XLIE / YLIE / ZLIE  (i put 1

Hi,I am using IIS2ICLX MEMS accelerometer in an IOT device.The IIS2ICLX is soldered on a PCB that sends data to internet every 10min.To measure the zero-g level of both x and y axis, I suspend the device from the ceiling so that the PCB (and the accelerometer) is perfectly horizontal and and vibration-free.I noticed that the zero-g level changes if I briefly touch the device, and wait for the device to return to its horizontal position (the temperature of the device does not change).Does anyone has an explanation ? I there a way to minimize this effect by using two redondant accelerometers, with a 90 degre rotation between them ?Thanks for your help.

Hi. I have been looking at the internal operation of MEMS devices and am looking for information on how this sensor takes the reading from the mechanical parts. I am trying to find out if this sensor uses capacitive sensing or frequency drift and time period for one sample to be acquired from the MEMS structure. The available documentation does not list much information of this and any additional information would be great. Thanks.

Hello everyone. I would really appreciate if someone could help me sort out a really annoying issue i have with a new STM32WB5MMGH6 based board i made.On this board i have two sensors connected to the same SPI interface (hspi2) with different CS pins to address the sensors. Here's the schematic sections of the two sensors : MS5607 :  LSM6DSV320XTR with an auxiliary IIS2MDCTR tied directly to it (for the test board, the magnetometer is not soldered yet):

Hi Does anyone know how to stabilize the gyroscope and accelerometer signals. I am getting signals back but I am trying to move a radio button on a bullseye and can't seem to smooth out the signal. I am using I2C communications.  

Red light flashing. App showing 0% charged after 15 minutes

Hey. I have recently received STEVAL-MKI109D + STEVAL-MKI238A for evaluating LIS2DUX12 accelerometer.I have opened MEMS Studio, chose my evaluation board and performed FW upgrade as prompted by the MEMS Studio.  I have then proceeded to Sensor Evaluation -> Save to File to capture my own data for further processing. Each sample was taken using 5 seconds timeout. So I just click "Start" and proceed with moving the board for 5 seconds. I did the following:1. Capture 3 "flip_down" samples of me flipping down the evaluation boar

Hi ST Community,I am working on a project using the SensorTile.box Pro. My goal is to implement a highly accurate step counter using the LSM6DSV16X's embedded pedometer.What I have done:I recorded data patterns at 30Hz and successfully ran the Pedometer Regression Tool in MEMS Studio.The tool generated the optimum configuration files (pedometer.json ).I converted these register settings into a .ucf file format.The Problem: I need to apply these "Golden Settings" to the sensor initialization in AlgoBuilder so they persist after a reset. However, I am unable to find a standard method to load this configuration:I checked the Sensor Hub block properties, but I do not see a "Load Configuration/UCF" option.I searched the Library for a "Register Write" block to manu

Hello, I'm using (ISM330DHCXTR) accelerometer to calculate the phase difference between two axes to measure the movement of a system. configured ODR at 6.6 KHz and measured the operation frequency of the system which has a 10% error while measuring the FFT and adjusted the ODR on the math lab logic to match the operation frequency of the system but still the phase difference has a major deviation, can someone confirm what is the ODR deviation on this sensor and how to correct the same on the firmware instead of modifying on the paired application.  

Hi     I am looking for example code for the LIS2DW12 using Arduino code . I am using an Expressiff module esp32 C3  Does anyone have some example code ?

We want to use the Sensor TileBox pro to measure temp pressure and acceleration in structures.   We have been using some of your boards the MKI versions and they will run at a maximum of 1400 time steps per second when configured for about 2000.   I have the tilebox pro exporting on the USB and picking it up with a new C# program.   See below.  It is reading at 18 cycles per second, I need to adjust the freq output, I thought I had a higher rate.  it is really easy to use, but I have the Android Program setting 75 from pressure and temp and 480 for acc

Hello. I have LIS2DUX12 accelerometer and have sucessfully ran machine learning example from STMems (activity_recognition_for_mobile) on our custom hardware.https://github.com/STMicroelectronics/STMems_Standard_C_drivers/blob/master/lis2dux12_STdC/examples/lis2dux12_mlc_activity_mobile.cFor our application, we need to be able to reliably detect when our device is being transported with a car but its not so straightforward. The few difficulties include:1. The device orientation is not fixed2. The device may shake gently or move very slowly during its normal application. This is perfectly fine and we should somehow not detect that. I have looked at different application_examples :

Hello,We have the ISM330DHCX designed into a new product but I am having trouble getting reliable readings using the I2C interface. I am able to read the WHOAMI register and get 0x6B but OUT_TEMP_L (20h), OUT_TEMP_H (21h) always return zero.I have the interface instrumented and I can see that the signalling is correct, with repeated start and everything, but only zeros.Does anyone have a suggestion of how this is happening?  Do I need to do something special to enable temperature readings?Thanks

 Hi everyone,I am working with the  LSM6DSM and an external LIS3MDL magnetometer and have the FIFO ODR set to 208 Hz, with no decimation configured.I am trying to understand exactly how the FIFO handles data in the following four scenarios. Could someone clarify what happens to the samples in the FIFO for each case?The Accelerometer or Gyroscope ODR is set higher than 208 Hz.The Accelerometer or Gyroscope ODR is set lower than 208 Hz.The external Magnetometer ODR is set higher than 208 Hz.The external Magnetometer ODR is set lower than 208 Hz.Any clear explanations on how the samples are handled (e.g., are they dropped, duplicated?) in these specific situations would be greatly appreciated.Thanks!

While using the iis3dw sensor, I discovered that when I employed an interrupt-based polling method to read data—where, ideally, the sensor captures data, triggers an interrupt, and then the data is read—the data acquisition frequency should be around 26 kHz (based on SPI transmission and code execution time). However, I found that reading the data was taking up some of that time; when I disabled this process, the issue disappeared. My SPI rate is 18 Mbps. Subsequent testing with FIFO reading also exhibited this behavior. Specifically, when I disabled the function `iis3dwb_acceleration_raw_get(&IIS3DWB_ctx, accel)` during the read process, reading 10,240 data points took approximately 391 ms (about 26k). Without disabling it, reading the same 10,240 data points took 523 ms (about 19k). Below is my read code without using FIFO. The attachment contains the official ST driver. `uint8_t iis3dwb_init_drdy_mode(void)` is the initialization function without using FIFO,

Split from Any accelerometer supporting >400g with integrated free-fall detection ? - this is a separate questionHi Team,Could you please suggest a suitable wireless development board that supports LSM6DSV320X, or any latest high g accelerometer sensors, apart from Sensor Tile Box Pro?

I am working with the LSM6DSV320X for vibration analysis and potential crash detection applications, and I have a few questions regarding its capabilities and system integration:Is the LSM6DSV320X considered a high-end processing device? Does it support on-board processing such as FFT, or is an external MCU required for such computations?What are the maximum bandwidth and measurement ranges (g for accelerometer and dps for gyroscope) available for the 6-axis IMU? How suitable are these for high-frequency vibration or crash event detection?How fast is the communication interface (I2C/SPI)? Can it reliably support high data rate streaming for real-time applications?Is it possible to integrate this sensor directly with a CAN bus, or is an external microcontroller required for CAN communication?Are there any development boards available that include this sensor for quick evaluation and prototyping?I would appreciate guidance o

Dear ST, For the ToF sensors supported VL53L8CH or VL53L7CH is it possible to make a hardware that depends on 4 x VL53L8CH or 4 x VL53L7CH integrated to increase the number of zones from 8 X 8 to 16 X 16 ?and if it is possible what would be the limitations in both HW and SW for this system?also provide me a reference for this implementation if exists.Thank you.

In LSM6DSV16X DS13510-Rev 4 Page 8, Table lists sensor fusion performance: Question 1: are these values guaranteed over temperature and all angles, or at a particular angle and at room temperature?Question 2: without a magnetometer or GNSS heading input, what is meant by heading/yaw accuracy? Is it a drift value (over 5 minutes) from whatever value it is given at the beginning of 5 minutes?Thank you.

Many years ago, at ANU in third year physics, the professor provided an object and said explain and check it as a project.  Let us assume that I have a SENSOR TILE.BOX pro and I follow my training and check the output of the MEMS Studio. The first step was to provide the CLI_Example amended so that it provided the files in the correct location for our downstream software.  I would not use your MEMs software, it is just to kludgy.  But I wanted to confirm my program and understand your data.The next step is to use MEMS Studio to get the output file processed log. The third step is to write a simple C# program to take the .dat files apart and complete necessary analysis and upload the needed output to the MYSQL cloud storage. {"c_type": 2,"data_ext": ".dat","data_fmt": "HSD_2.0.0","description": "","end_time": "2026-04-02T17:4