MEMS (sensors)

Hi,im currently working on interfacing the STM mems sensors with Beagle Vahead board, im using a kernel version of 6.13 and i tried patching the STM MEMS IIO drivers from link. Im aware that the STM has confirmed the testing of the driver with kernel 6.6.While patching i faced few errors ie mis match in the headders and i have successfully resolved them.im able to boot the device and able to get the device node in the /sys/bus/iio/device  when interfacing the lps22df sensor.when any other sensors (lsm6dsox, lisduxs12,lsm6dsv32) are interfaced on the same bus, im not able to detect the device. i have the same hardware set for lps22df  also. but in that case i was able to get the raw pressure and temperature data.I want to understand the issue why it happens so.i have mentioned the mininal properties on the i2c bus node in DTS file. and have omitted all the optional parameters.have a look at the STM driver booting e

Hi ST Community,I’m trying to use the LSM6DSO32XTR in Mode 2 (SensorHub) to stream data from two accelerometers, two gyroscopes, and a magnetometer into the 9-kbyte Smart FIFO for motion tracking over 10–30 minutes, aiming for low MCU interrupts and power usage.What I’ve Tried:I’ve set up one LSM6DSO32XTR as the master (using its internal accelerometer and gyroscope) and planned to connect a second accelerometer (e.g., LIS2DH12), a second gyroscope (e.g., L3GD20H), and a magnetometer (e.g., LIS3MDL) on the secondary I²C bus (SCx/SDx).I’m using Zephyr RTOS, referring to the datasheet (Section 7.2, 5.4), but learned I can’t connect another LSM6DSO32XTR as a slave on the secondary bus.Questions:1. Has anyone done a similar Mode 2 setup with these sensors? How did you handle I²C addressing?2. Any pitfalls in the Mode 2 config to ensure FIFO streaming works?3. Tips for power optimisation and avoiding data loss over long periods?

Hello everyone, I'm stuck and I need some help. I have the LIS2HH12 accelerometer connected to my raspberry pi via SPI. So far, I have been able to collect real-time accelerometer data . But my goal is to only get data once the accelerometer is titled or moved(I've noticed that z goes to less than 0.7g when tilted). I'm trying to program the INT1 pin to send a high or low signal to my gpio once movement is detected. But so far, I've failed.   Here's my code, if anyone can please look at it and help a desperate PhD student I would be very thankful! import spidevimport RPi.GPIO as GPIOimport time # SPI Configurationspi = spidev.SpiDev()spi.open(0, 0) # Bus 0, Device 0spi.max_speed_hz = 10000000 # 10 MHzspi.mode = 0b11 # GPIO ConfigurationINT_PIN = 22GPIO.setmode(GPIO.BCM)GPIO.setup(INT_PIN, GPIO.IN, pull_up_down=GPIO.PUD_UP) # Register addressesCTRL1 = 0x20CTRL2 = 0x

Hi, Is it possible to obtain more information regarding the typical performance characteristics of MEMS accelerometers? We are currently evaluating the LSM6DSO32 sensor, and the datasheet is mostly just +/- in terms of accuracy. We would like to see the performance graphs over a range of frequency / temperature / etc.  

Hello,Please , can i use the module STEVAL-MKI228KA (ILPS22QS) with arduino ?Thanks

Hello, I am trying to use the output of the LSM6DSL (accelerometer + gyroscope) to feed an orientation filter. While the accelerometer part is easy to interpret, I am having some trouble with the gyroscope. Apologies if my question is trivial, I have not found any clear answer on the subject so I must have missed something very obvious.   The LSM6DSL returns the angular velocity of the device as a vector of 3 Euler angles, one per axis. With this sort of representation this usually means that the underlying rotation R is a composition of 3 axial rotations, either intrinsic or extrinsic, such as R = R_x * R_y * R_z or any of the permutations. The actual order of the permutation being crucial. The documentation is not 100% clear to me in what order I should apply the axial rotations to describe R. There is no textual mention of this in the Application Note but on page 2 there is a diagram showing: The axis of the acce

Hi Team,I came across the LSM6DSV16BX, which seems suitable for sports earbuds. Are there any compact earbud-style development boards or hearable devices available on the market?

Hello,I am looking for MEMS accelerometer for seismic application.We need low noise, up to 100Hz bandwidth, full scale +-2g range.I consider IIS3DHHC as a candidate, which has features as below:3-axis, ±2.5 g full-scaleUltra-low noise performance: 45 µg/√Hz16-bit data outputI would like to clarify what is the effective number of bits for 16bit output?How does the Sensitivity 0.076mg/LSB relates to the noise performance?Is there any other products with lower noise?Best regards,Lhagva

Hi based on the quaternion/Sensor fusion of LSM6DSV example I developed an application where I display the direction of a cube. Everything works fine, no drift, but: when I take the device move and turn it around, then put it back in the same exact position, the drawing on the PC is not back to the same direction as when I started.What is going wrong?Thx

Hello all,I'm currently using the LIS2HH12 to sense the acceleration on the three axes. My aim is not to continuously read the acceleration value, but is to set a threshold for each axis and receive an interrupt when one of the thresholds is exceeded. The problem is that when I enable one of the three axes or all axes at the same time, by writing the appropriate values in the appropriate registers, an interrupt is generated even if no threshold is exceeded. This only happens when the interrupt on a particular axis is enabled for the first time, if I disable the interrupt and then re-enable it, no "false interrupt" is generated.At initialization, i set the following registers values:CTRL1 : 0x37CTRL3 : 0x88CTRL4 : 0x34FIFO_CTRL : 0xE0IG_CFG1 : 0x2AIG_DUR1 : 0x01All other writeable registers are set to 0.If I want to enable the interrupt on one or more axes, I write the LIS2HH12_REG_IG_CFG1, LIS

I'm trying to use the LPS27HHW in a 1 gram wildlife tracking device (water resistance required) and am wondering (a) how pick&place is supposed to pick up the sensor, and (b) how I can apply automated spray conformal coating to the board. I would have expected an option where the sensors are shipped with a small cap or film to facilitate p&p and to protect the sensor and that gets removed after assembly is complete... I'm probably missing something?

Hello, We received LIS2DH12TR bought from distributor source with full label and full lot code.Our QC team checked with measuring equipment, and we found the height is above the max 1.0mm. Is it considered normal phenomenon?   Referring to photo attached, thank you!  

Greetings - what are the recommended maximum current ratings for the INT pin in either Push-Pull or Open-Drain? And FWIW, I was really surprised NOT to find this published in the datasheet...TIA,-Terry

Hi,I would like to confirm if setting LSM6DSO ODR to 6.66KHz and LPF2 to ODR/10 (resulting to 666Hz bandwidth), then setting a FIFO decimation factor of 8 (resulting to 833hz FIFO ODR) will work in preventing aliasing for signals above 417Hz? We have discovered with LSM6DSL that it doesn't work that well, but looking at a previous post where the LSM6DSO is recommended (Solved: LSM6DSL anti-aliasing filters do not appear to be ... - STMicroelectronics Community). So I would like to confirm it before we do a hardware change in production. Thank you. 

Hi All,I am currently working on a health tracker/monitor project that utilizes the LSM6DSOX sensor, interfaced with the nRF5340 platform and running Zephyr. So far, I have successfully implemented tilt and tap detection features.As the next step in the development process, I aim to integrate an activity state monitoring feature (e.g., detecting walking, running, or stationary states). To achieve this, I plan to leverage the Machine Learning Core (MLC) of the LSM6DSOX sensor. However, as I am new to MLC, I would greatly appreciate any guidance or resources that can assist me in understanding how to effectively use it and integrate it into my existing code.Best regards,Ilam

Hello, community! I recently purchased the SensorTile Box Pro to conduct various educational experiments. It connects via Bluetooth to my phone, but when I try to connect it to my laptop using the MEMS STUDIO application, it does not work via either USB or Bluetooth. I receive a red error message stating that the board is not identified. I have tried on three different PCs, both on Windows 10 and Windows 11, but it still does not work. All the necessary drivers have been installed, and I have no explanation for why it is not being recognized. I should mention that my laptop is running Windows 10. Can you help me?

Hey everyone, I’m working on a low-power motion tracking project using an LSM6DSL IMU to capture 3D acceleration and gyroscope data. This sensor is interesting because it has an "Always-On" mode, which is supposed to keep motion detection running with minimal power consumption. I came across this article: LSM6DSL iNEMO Inertial Module – Always-On 3D Accelerometer and 3D Gyroscope, which explains the features and power management modes, but I still have some questions: What’s the most efficient way to configure the power modes to maximize battery life while maintaining good motion tracking performance? Has anyone used the embedded finite state machine (FSM) or machine learning core (MLC) in this I

Hi,I am really new to this sensor and I was able to get the polling mode working.I am planning for full 6.6k odr rate and FIFO samples can be 256 when INT1 should be triggered or whenever possible so I can use FIFO .I am really confused with the order / things to keep in mind to properly get this working. I am using steval Idp0051v which has ISM330DLC sensor connected via SPI1 .This is my code that hass all the functions to use the sensor :/* * memsSensor.c * * Created on: Mar 26, 2025 * Author: amrith */ #include "memsSensor.h" #include "ism330dlc.h" #include "main.h" extern SPI_HandleTypeDef hspi1; ism330dlc_ctx_t ism330dlc_ctx = { .write_reg = ism330dlc_spi_write, .read_reg = ism330dlc_spi_read, .handle = NULL // Not used in this case, but can point to &hspi1 if needed }; // IO structure for ism330dlc.h ISM330DLC_IO_t ism330dlc_io = { .Init = ISM330DLC_SPI_Init, .DeInit = ISM330DLC_S

Posted on June 09, 2017 at 16:37Hello everyone,I Would like read the lsm6dsl data by interrupt using the pin int1 on the sensor.I configured the accelerometer ODR to 104 HzAnd i set up registers as follow : - Control_3C (0x12) =  64 (Data updated only when register has been readed / Interrupt level High / interrupt pin in push pull)- Int1_CTRL (0x0d) = 1 (INT1_DRDY_XL enabled)I get the first rising edge on int1 pin, this edge is detected by my MCU, I read status register and accelerometer datas but the int1 pin of the lsm6dsl stay in high level. How may I clear this interruption for the next set of data ?Datasheet v :  DocID028475 Rev 6 ThanksGeoffrey

Hi,I want connect my SensorTile box with my Raspberry pi. For this, I use example_ble_1.py, but every time when i try to connect the devices then one of the given errors occur:guest@raspberrypi:~ $ sudo python3 example_ble_1.py##################BlueST Example##################Scanning Bluetooth devices...Discovery started.New device discovered: TB2 .Traceback (most recent call last):File "/usr/local/lib/python3.9/dist-packages/blue_st_sdk/manager.py", line 313, in discoverself._scanner.scan(timeout_s)File "/usr/local/lib/python3.9/dist-packages/bluepy/btle.py", line 854, in scanself.stop()File "/usr/local/lib/python3.9/dist-packages/bluepy/btle.py", line 803, in stopself._mgmtCmd(self._cmd()+"end")File "/usr/local/lib/python3.9/dist-packages/bluepy/btle.py", line 309, in _mgmtCmdrsp = self._waitResp('mgmt')File "/usr/local

I have a problem with identifying the sensor type from the marking on the housing. One is LSM6DSO32XTR and the other is ASM330LHHXTR. Unfortunately they came in a bag without a description on the label. One is marked T3 [QR code] 233 and the other LC [QR code] 307.Is there a way to identify them without attaching them to the board? Unfortunately the datasheet did not help.Thanks

Hello, I am testing STEVAL-MKSBOX1V1 connected via USB to a Raspberry Pi4. On the SensorTile.Box I have installed the firmware version 3.4.6 or 3.4.7 (tried both these versions), since the last version 3.4.9 has a bug with the application I am running. The application is the classic "Vibration Monitor" app that is present by default on the SensorTile.Box, with some little modifications (expert mode): instead of sending data over BTLE interface, I have defined to send the output data of this application over the USB port, which is connected with the Raspberry PI4. After creating my custom application on my Android app, I click on PLAY and the custom firmware is flahed via BT on the SensorTile.Box. On Raspberry Pi Terminal interface the device is recognized from that moment on as "ST Virtual COM Port". All perfectly working, since the red led on the device starts flashing (i presume it

I've been trying to create a mesh for 2 weeks now and even just send data from a card to a pc via bluetooth but I'm completely stuck and I really need help. I have 3 sensortile cards. box (STEVAL-MKSBOX1V1) I saw that it had v5.2 BlueNRG-M2 and so normally I could make a mesh using function pack or even the application ios st ble mesh. but I'm totally blocked I wonder if this is even possible.Can anyone give me some pointers, particularly on how to integrate the function pack or something else?

helloI've been trying to use the LSM6DSV on it's steval-mki239a board with a nucleo board (nucleo-l476rg) via SPI and the lsm6dsv is not answering whatever the configuration of my SPI is.The sensor is fine since it work with the steval-mki109v3 board ans the MEMS studioI checked the SPI signal on the steval mki109v3 with a logical analyzer and found several odd things but the sensor is answeringI don't know if it is my analyzer but the MISO line is always stuck at 1 and the level of MOSI are strange but the sensor understand the message and answer with the right value (WHO_AM_I register:  MOSI should send 0x0F and MISO answer 0x70)

Hi,  I am using the LIS2DH12 to interrupt me on an inertial wake.  I am running in Low Power mode with a scale of 4G.  After verifying that the X axis produced the force that caused the interrupt I read the X_OUT_L and X_OUT_H registers to get the 2's complement value in the X_OUT register.   I want to calculate the actual force in mg that caused the wake.  Can someone verify that I am doing this correctly? OUT_X register contains 0xFC00I use these functions in my calculationint16_t twos_complement_to_decimal(int num_bits, int16_t num) {    // Create a mask to isolate the sign bit (most significant bit)    int sign_bit_mask = 1 << (num_bits - 1);    // If the sign bit is set (number is negative)    if (num & sign_bit_mask) {        // Invert all bits, add 1, and negate to get the decimal value  &nbs