MEMS (sensors)

Hi.I'm having difficulties understanding how to configure the LIS2DE12. Especially the filter part is obscure to me.I want the accelerometer to generate an interrupt when the device changes from being still to moving or the opposite.The power consumption should be as low as possible, so an ODR of 1hz has been chosen, and also smaller movement should be filtered out. That means the device should have been moving for at least 5 minutes after having being still or vice versa before generating an interrupt.I hope someone is able to help.Thanks.

Hello.I am a graduate student who is conducting research using IIS2MDC and Arduino, a digital magnetic sensor of STMicroelectronics.I am currently using IIS2MDC and Arduino Uno to measure the magnetic fields in the form of sine waves generated from the coil.First of all, the measurement environment is composed as shown in the picture below. The code used the stm32duino/IIS2MDC/IIS2MDC_DataLog_Terminal.ino code listed on Github. I am proceeding with the measurement by modifying the Baud rate and Delay time.The picture below shows the magnetic field measurements of the coil for AC 20 Hz current at Baud rate (2000000), Delay time(0). The questions I would like to ask are as follows.1. I need to connect the cs pin to the Arduino Digital 0 pin for data to come in, what is the meaning of this connection? Also, I'm using the drdy pin without connecting it, and I'm curious about the meaning of these two pins. 2. When I set the sensor ODR to 100Hz and looked at the magnetic field

Hi Team,I want to evaluate LSM6DSO16IS, I found one expansion board X-NUCLEO-IKS4A1 already mount this sensor and have corresponding software and projects accordingly, additionally in projects could use NUCLEO-F401RE board to communicate, but seems in projects by default use LSM6DSV16X to get acc and gyro data rather than LSM6DSO16IS, is my understand correct? Should I just change the macro definition to initialize LSM6DSO16IS, can the project directly take to use or others need to change, like loading ISPU related underlying driver. Thanks a lot! 

Hey ,i have been trying to link ISM330DHCX sensor to external sensors.Problem :working with STEVAL-STWINKT1B board and the schematics for my sensor ISM330DHCX clearly cannot be configured to be connected to external sensors , even though it is allowed to link up to four sensors as slaves .in my case ( with the KT1B board) ISM330DHCX (the I²C master) sensor communicate with the processor via SPI ( 4-wire) and should be commmunicating with its slaves (in here im working with one and only slave ; IIS2MDC : magnetometer) Via I2C ( sensor hub mode 2 is enabled ) ,in my case : i get no data even though i made sure to configure I2C and Configure Sensor Hub to read IIS2MDC , followed every step of AN5398 (7 Mode 2 - sensor hub mode.), Prepared sensor hub to read data from external Slave0 continuously, Enabled accelerometer to trigger Sensor Hub operation and Enabled I2C Master ; RQ :  All external sensors have to be connected in parallel to the SDx/SCx p

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We are using ST IMU LSM6DSL in to our chipset/PCB.We are looking for ready to use software or algorithm to implement in to our firmware to determine the speed/acceleration & distance from IMU data.Is there any example code available for share?

Hello all,   I'm looking at the datasheet for the STW56N60DM2, and it's really not clear if the back of the FET is electrically isolated from the Gate, Source, and Drain. Typically, this is more clear in other datasheets I've looked at. Below is the only "hint" I can find that the part is isolated. The image below is from a different manufacturer, and they make it much easier to determine. 

We got Sensor tile box and they were working fine until we uploaded this:https://www.st.com/en/embedded-software/stsw-mksbox1-bl.html/1000vai bluetooth. Now they are not visible on the app ST ble sensor. How to update the original firmware on the sensor tile box (nnot pro) to make them work?

I struggle to use PDM Filter library.This is the message error I get : What I have done so far are : - in project properties, C/C++ general, Paths and syombols, in "Includes" I added the path to pdm2pcm_glo.h ; in "Library Paths" I added the path to a folder with all the libPDM_FIlter_CM3_GCC_wc16.A ... files.- Wrote #include "pdm2pcm_glo.h" in the main.It's still not working :\In "Paths and Symbols", in libraries, I think I can add a library but I don't know which one to use (all the files were included in mems1 folder). I tried randomly picking but I had another error message;I am new to cubeIDE so it's very possible Im doing a beginner mistake here

Hello,We have been using the LSM9DS1 in our own design with Linux kernel 4.19.x by adding drivers from ST github, and using the iio_generic_buffer tool to read values.Now we are upgrading to linux kernel 6.1.46 and I have checked that the drivers are included in the "drivers/iio/imu/st_lsm6dsx/" directory. I am trying to use the same tool to retrieve values and I get this error:iio_generic_buffer -n lsm9ds1-imu_accel -A -g -c 5iio device number being used is 2trigger-less mode selectedEnabling all channelsEnabling: in_accel_y_enEnabling: in_accel_x_enEnabling: in_timestamp_enEnabling: in_accel_z_enFailed to enable buffer '/sys/bus/iio/devices/iio:device2/buffer0': Unknown error 524Disabling: in_accel_y_enDisabling: in_accel_x_enDisabling: in_timestamp_enDisabling: in_accel_z_enThis error means ENOTSUPP (Operation is not supported) and I have checked in "drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c" that the fifo_ops feature is not included for the LSM9DS1 ID.I would like to know if you

hiwere would i find a recent webinar on how to use X-CUBE-MEMS1? I am interested in Lsm6DSL.Thx

In the project I use Attiny13a) + LIS2DH SPI interface. One leg of the microcontroller is missing. Is it possible in SPI mode to connect the CS pin directly to GND, and not to the microcontroller port.In I2C mode there are enough pins, everything works fine, but the current consumption is too high. 

HiI am updating a PCB comprised of LSM6DSL, LSM303AGR and STM32F4 for a customer. I wonder if these 2 sensors are still the latest and greatest? Or should I better switch to some thing newer?Thx 

Hello there,What is the resonance frequency of the LSM6DSO32 accelerometer and gyroscope?It is not available in the datasheet. I tried to open a customer support tickets but they just forwarded me to this forum. 

Hello, im having some issues with lis3dh data. So im trying to configure and read data from sensor, but its invalid. When i read my buffer L values that are 0 2 4 they seem right: But when i try to connect the data or even read 1 3 5 value that are H, its starting sending some values that are 100% incorrect. Im not moving sensor in any direction. These are H value. When i connect them. x = buffer[0];x |= ((uint16_t)buffer[1]) << 8;y = buffer[2];y |= ((uint16_t)buffer[3]) << 8;z = buffer[4];z |= ((uint16_t)buffer[5]) << 8;doing sth like this the values jump from 32k/16k and 0. I have no idea what's going on. Im just sending adress to X_L with setting 1 MSB for auto increment. Ofc, ive configured sensor CTRL_REG to turn on normal mode 100Hz XYZ axis ON and 2g. And i have some question about FIFO too. I've seen some examples from github. To be precise: lis3dh_multi_read_fifo.cAnd ive set it up for my board. Same configuration,

Hello, I am experiencing significant challenges with programming the SensorTile Box Pro. I successfully loaded the base firmware STSW-MKBOXPRO Expert Mode v1.1.1 and managed to retrieve data from the accelerometer, gyroscope, magnetometer, and temperature sensor via USB. However, I am facing two issues: 1. When I attempt to add microphone data to the other sensors' data flow, I encounter a problem. After uploading the new flow, which includes Fourier-transformed microphone data, the SensorTile no longer appears among the devices connected via USB. Could you please assist me with this? 2. My second issue concerns data saving to an SD card, which does not seem to be working. Despite leaving the SensorTile Box running overnight to log data, the newly created output.csv file on the SD card is timestamped "31/12/2016 at 13:00" and is only 1KB in size. When opened in Excel, the file is empty except for the columns labeled by data type. I also tried using the Datalog2 firmware,

Hi,  I want to know the shock survivability of the pressure sensor LPS27HHTW but I didn't find it in datasheet or application notes.Do you know an application note or data about its shock resistance Thanks for your help   

I couldn't find information about the topmaking for the nano sensor LPS22HB on the datasheet, I need to implement a visual inspection for this IC.Does anyone knows where I can find this info? 

Hello everyone,We manufactured about 100 boards for a pre-production run using the LIS2DTW12, and at room temperature, the boards are all over the map with +/-3°C accuracy, nowhere near the "typical" +/-0.8°C as stated in the datasheet.I've already seen the other post regarding temperature accuracy issues for the LIS2DTW12, but I did not see a resolution or an accepted solution in that post, so to me at least the problem was not solved.Our production volume is 10k+ a year, and we've selected this part because of the temperature accuracy features. I know the data sheet does not show min/max for temperature accuracy, but on a sample of 100 boards, the sensor is nowhere near the "typical" values.Also, I noticed a large temperature variation with the supply voltage: on the EV board, if you change the VDD from 1.8V to 3.6V (using the Advanced Features) the temperature readings (in Data panel) are jumping up by 2°C!There is nowhere in the data sheet any information regarding the temperature

Hi,I want to connect the microphone feature to my raspberry pi so that I can extract the data and put it in databases. Only when I connect my SensorTile.box (STEVAL-MKSBOX1V1) with my Raspberry pi 3 Model B+ I can see the standard features but not the microphone feature. I flashed the FP-SNS-ALLMEMS1 firmware to my sensor and followed the Getting started with the BlueST protocol and SDK documentation to write my code. Here's the output I get:guest@raspberrypi:~ $ sudo python3 mic_test.pyCreating Bluetooth ManagerdoneScanning Bluetooth devices...Discovery started.New device discovered: AM1V410.Discovery stopped.[<blue_st_sdk.node.Node object at 0x7639d370>]Connecting to device: AM1V410 (ea:eb:d5:a3:cf:fd)Device AM1V410 connected.Available features:GestureActivity RecognitionTemperatureTemperatureHumidityPressureMagnetometerGyroscopeAccelerometername 'SCANNING_TIME_s' is not definedAvailable features:GestureActivity RecognitionTemperatureTemperatureHumidityPressureMagneto

Hello,I would like to know the thermal resistance of the accelerometer part no:AIS328DQTR.Let me know your input!Regards and ThanksMadhu

I think signal delay library does not work on MEMS Studio.I made an example code to show temperature values from a nucleo-L476RG and x-nucleo-IKS01A3 setup.The code should show the actual value and a delayed one:But it gives the following error:This exact situation was replicated on AlgoBuilder software and worked without any issue. Any idea how could I work this out?Thanks in advance

Hi,I encountered a problem with a couple of LSM6DSOX employed over 2 years in a mobile Hydraulcs application where the came back to factory for inspection and we saw a significant drift of the offset of the accelerometer (>200mg).Looking at the ASM330LHHXG1 we saw that it is reported in the datasheet the additional information regarding the long term stability (instead of the typical values).I do not understand if the reported values indicate that a component MAY drift during its lifetime up to the reported values or if the values reported refer mainly to the raw data before a calibration step that we do during production. Also, given the absence of the max/min long-term reference in the LSM6 datasheet, would it be correct to assume they perform worse than the ASM330 during lifetime? Or instead are the ASM330 only guaranteed to not go outside max/min specification but on average they perform the same? This discussion is for now limited only to zero-g offset deviation

I have several boards with lis2dh12 and all of them keeps return constant data for lis2dw12_acceleration_raw_get function, every board has its own constant, 0x5050, 0xe0e0, 0x7070.I tried using the STEVAL-MKI135V1 connected to STM3220G-EVAL to test maybe our implementation and board design is the problem, but the same happens, it returns constant 0x6060.We also have some boards that we use lis2dw12 instead, everything else is exactly the same, and it works great with the drivers for this sensor.Here is the code for init and for reading data:void Accelerometer_Init(void) { lis2dw12_device_id_get(&dev_ctx, &whoamI);   if (whoamI == LIS2DW12_ID) { /* Restore default configuration */ // lis2dw12_reset_set(&dev_ctx, PROPERTY_ENABLE);   // do { // lis2dw12_reset_get(&dev_ctx, &rst); // } while (rst);   /* Enable Block Data Update */ lis2dw12_block_data_update_set(&dev_ctx, PROPERTY_ENABLE); /* Set full scale */ //lis2dw12_full_scale_set

Hi,I am using LIS2DW12 to detect walking situation of old man.Old man is walking slowly and little moving, In order to detect this small moving, what and how do I set CTRL register you recommend?I have to check continuous moving state....If LIS2DW12 is not suitable this acton, what do you recommend new chip? BRPaul