MEMS (sensors)

Hello,I am using a I3G4250D gyroscope and would like read the temperature. Currently, I read 246 (in decimal) in my register 0x26.In two's complement, it is equivalent to -9.   Then I have to multiply by -1 so -9 * -1 = 9°C (I am not sure)But It is the summer, and 9°C for a measure of temperature is not possible. I read 10 times the datasheet but no one information to convert the data from register into °C.Can you help me please ? It will be great to edit the datasheet to give a formule to transform the raw data in °C.ThanksTom

I have added Digital Inclinometer application of X-Cube-MEMS1(9.6.0) on stm32f777zit6 wherein I want to read the rotation(angle) from LSM6DSL device. I have added all the required component files and Motion_DI library to the workspace.Reference taken from: X-Cube-MEMS1>>9.6.0>>Projects>>Nucleo_F401RE>>Application>>IKS01A2>>DigitalInclinometer I am successfully able to configure the LSM6DSL with i2c1 of stm32f777zit6 and able to read the "who am i".But my MotionDI library is not getting initialised. During debug, my code gets stuck at function MotionDI_manager_init((int)ALGO_FREQ);.  Code is not working after this.Kindly suggest what can be the issue?? RegardsALPS  

would you please help to review the attached log and give some advice to customer?Thanks.Attached is the test log data, test conditions:1. The device is fixed on the desktop without moving or shaking. 2.2. The CPU reads the X/Y/Z data of the Sensor via I2C, and found that the X-axis data is decreasing, but the Y/Z data does not change in a wide range. 3.3. CPU platform: RV11264. Kernel version: linux 4.19, the kernel is a little change: linux is used in version 4.19, because in the L4.19 kernel to read the data also has anomalies, the customer ported the L5.10 version of the lsm6ds3tr-c driver.[root@RV1126_RV1109:/userdata]# . /test.sh[0] accel: -714 -1780 -16310 anglvel: 83 -438 -118[1] accel: -718 -1781 -16323 anglvel: 84 -437 -121[2] accel: -719 -1781 -16317 anglvel: 85 -437 -118[3] accel: -727 -1783 -16320 anglvel: 80 -438 -116[4] accel: -727 -1783 -16317 anglvel: 83 -437 -119[5] accel: -732 -1786 -16311 anglvel: 86 -438 -117[6] accel: -738 -1782 -16309 anglvel: 79 -437 -117[7] acc

I am measuring pressure using the LPS28DFW under conditions where the gas flow is approximately 70°C with a relative humidity of 80-100%. During measurement under these conditions, I encountered an issue where the sensor stops working. However, the sensor resumes normal operation once it is sufficiently dried. According to the datasheet, the sensor is expected to function under these conditions, but it currently does not. I would like to inquire about the possible reasons for this issue.Even in the presence of liquid droplets, the gel should prevent these droplets from reaching the MEMS, allowing it to function normally, but this is not happening. Could it be that the protective gel on the MEMS is leaking or detaching under these conditions?

Hi,I want to know the best solution to read accelerometer and gyroscope data using the STEVAL-MKI182V2 board with the STEVAL-MKI109V3. At this moment, I can use Unico-GUI to read live all the data from the sensor, but I want to make a AI model to read directly from the sensor and to predict certain movement from the sensor like standing up or seating on a chair for example.Is there a way by using the STM32CubeIDE or the MEMS studio? After opening the MEMS studio, the STEVAL-MKI182V2 doesn't look to be compatible with this program, why ?In STM32CubeIDE there's the module XCUBE.AI but can I feed through the model I'm giving him the data that the mcu is reading from the sensor live?I'm not very familiar with AI stuff so be gentle with me please :)

Hi,I'm unable to connect my STEVAL MKBOXPROA  (SensorTile.Box Pro) to Mems Studio, here's what I get:"board not identified" I tried uploading the DataLogExtended.bin, and it says it programs successfully, but I noticed there's a quick "verification failed" in there, and I still get the same problem as above.Any help on what I'm doing wrong would be greatly appreciated.Cheers,Keith.  

Hi everyone.I'm trying to use a NUCLEO-F401RE, a X-NUCLEO-IKS02A1, and a STEVAL-MKI197v1 and the following software: v3.2.0.4544 AlgoBuilder, v1.25.1.11665 Unicleo-GUI, v1.15.0 STM32CubeIDE, v6.11.0 STM32CubeMX and the X-CUBE-ALGOBUILD and x-CUBE-MEMS1 software packages (everything running on windows 11). First I didnt use AlgoBuiderI selected every sensor each board has on the x-cube-mems1 (package) and build it using CubeIDE (no error or warnings), but the Unicleo-GUI shows only the X-NUCLEO sensors, being unable to switch between (for example) the different Gyr/Acc sensors.If i dont select the board extension IKS02A1 CubeIDE gives no trouble (0 error and warnings) but the Unicleo-GUI doesnt recognice my board and i get stuck here:(note: If i select to list all coms it appears, but shows nothing and cannot start) When I try to create a custom firmware for AlgoBuilder, if I select the Algo custom aplication option without the MEMS IKS board extension. I copy the project

My customer asked me to assess some ST MEMS products using a project he found on Github: https://github.com/STMicroelectronics/X-CUBE-MEMS1/tree/main/Projects/NUCLEO-L152RE/Applications/IKS01A3/FitnessActivitiesThis advised to purchase a Nucleo L152RE, a X-NUCLEO-IKS01A3, STEVAL-MKI196V1 and STEVAL-MKI224V1. I have actually ended up with a X-NUCLEO-IKS02A1 because the X-NUCLEO-IKS01A3 is obsolete and the write-up on ST web site https://www.st.com/en/development-tools/unicleo-gui.html says it can be used. I used the most recent updates to STM32CubeIDE to download and import the FitnessActivities project and compiled it okay, and installed it in the Nucleo L152RE with the X-NUCLEO-IKS02A1 plugged in.This sort of works but the Unicleo-GUI thinks that the X-NUCLEO-IKS02A1 is an X-NUCLEO-IKS01A3 and shows the wrong links to set pictorially, with nothing readable on the screen.Will this set-up work with the current set of equipment? I am interested in assessing both the optional sensors I li

LSM6DSOX is a really powerful chip for detecting events, but i also wanted to get quaternions out of it without having to do any math on raw IMU data.   So this is what i found Example  IMU driver  Register 59H - TAP_THS-6D,  You can enabled 4D/6D position.   This will trigger events from register D6D_SRC 1Dh But this just give you a general direction on where your going.  It would be more useful if i had just a quat i could grab at a given frame rate.  Is that possible?  

Hello,we use STHS34PF80 sensor as little animals detector (FOV ~ 20cm) and we have problem with false motion detection on outside. When we have sunny day the sensor goes crazy and output random MOT_FLAG signals. We have try to change LPF_P_M and LPF_M filters but without success. Also we try to change motion threshold and motion hysteresis also without success.Is any solution for this problem?Thanks in advanceAdam Socha

I have a big issue with the STEVAL MKSBOX1V1. I was making some attempts to work with the Vibration Monitoring Example (made up of "Training" and "Compare" sub-processes). After having successfully run the example on the firmware preloaded on the SensorTile.box, I made some changes to the examples in order to stream data over Bluetooth, so I uploaded a custom firmware. Af this the SensorTile proposed to me to upgrade to firmware 3.4.9, so I accepted it and the new firmware was correctly uploaded. I noticed however that the example didn't work correctly anymore, since the "switch lamp" that should be light-on only when an anomaly vibration was detected, was always lighted on after the firmware upgrade. So I checked the possibility to swap to previous firmware version, but no possibility was provided within the app and on the ST site, associated to the  STEVAL MKSBOX1V1, I found only one firmware with description "SensorTile.box firmware OTA function restore". In the details "T

does MEMS studio support STEVAL-STWIN KT1B board ; cause according to the UM (https://www.st.com/resource/en/user_manual/um3233-getting-started-with-memsstudio-stmicroelectronics.pdf) only STEVAL-STWIN KT1 Hardware compatible (not with full/reduced sensor evaluation) just for algobuilder functionality.

I am designing to mount LPS25HB on the board.Communication is I2C.Please help me with the connection of Pin 7 (INT_DRDY).Is this pin an open pad? Or does it need to be connected to GND?

I have 4 LIS2DW12TR accelerometers connected to an Seeed Studio ESP-32 S3. The accelerometers get extremely hot when they're connected to 3.3V. They are not recognised with an I2C scan.The accelerometers are connected to 2 pairs of SDA/SCL pins. Each accelerometer has the same layout, save the SAO pin which sets the I2C address.They each have an LED connected to show that the accelerometers are on.They're connected as follows: The LEDs don't turn on but the accelerometers get extremely hot.Thing's I've tried so far:Did a continuity test with a multimeter (and very fine needles) - all the routes are connected as the schematics show, none are shorted.Removed R9 - the accelerometer became even hotter.Added a 27kΩ resistor to limit current to 100uA (data sheet asks for 90uA). I chose 27kΩ by measuring resistance between the 3.3V power route and the ground plane - it was 11kΩ. `27kΩ ≈ (3.3V/90uA) - 11kΩ`I'm not sure what else can be causing the over heating, or what i'm missing here. This

Hello everyone,I'm working on implementing the Kalman Filter algorithm for sensor fusion from the MotionFX library using the ISM330DHCX MEMS sensor. My setup consists of the STM320G71RB board and the IKS02A1 expansion board. I'm trying to get the pitch and roll angles mainly, but the problem is, when the sensor is static, the pitch and roll angles exhibit drifting over time. In addition, when I look at the raw data from the gyro and accelertometer along all three axes, I don't see any drifting, only consistent fluctuations. This is what i'm currently doing using the motion_fx_cm0p.c library:  -MotionFX init-Gyro calibration enabled-6x fusion enabled and 9x fusion disabled- sensor setup at 12.5 Hz data rate for both Acc and Gy, scale set to 2g and 125 dps, slope filter for Acc set to ODR/100, and LPF enabled for Acc.- data acquisition from Acc and Gy in g and dps respectively.- applying the MotionFX_CM0P_update() function to get rotation angles.  I also have tried co

Hallo ST Community, Which Part Marking has H3LIS331DL ? Thanks RegardsBadis

STEVAL-C34KAT1 Vibrometer eval board came today and I see it came with 32 pin expansion flex cable (STEVAlL-FLTCB01).   On one end, I plug it to this eval board.  On the other, what do I plug it to?  None of my ST eval boards have such connection.   I need some kind of (beak out) adapter to connect to pins on  board.  What adapter do I need please to connect this to pins?

Hello Everyone!!!I am using ISM303DAC Mems sensor for my project ie., E-Compass.I have used MotionMC and MotionEC libraries to get the heading value i my compass is getting calibrated by MotionMC and after that i am sending those calibrated values to MotionEC library and receiving heading values but there i have found that Angle is drifting about 0.1 -  0.9 deg. Is it possible to compensate this drift i have taken reading for 15 min in a particular place & observed that there is a standard deviation of around 0.5degCan anyone please suggest how to compensate this drift.Thank you!!!regards,ANIL.

Hello Everyone!I am working on a project Ecompass using controllers STM32F401CBU6 and mems sensor ISM303DAC. can able to read raw values of both accelerometer data and magnetometer data properly and after reading the magnetometer data i am parsing magnetometer data to MotionMC library for calibration purpose but after calling MotionMC_GetCalParams function output is always showing asHI_Bias = {0, 0, 0},SF_Matrix = {{1, 0, 0}, {0, 1, 0}, {0, 0, 1}},CalQuality = MMC_CALQSTATUSUNKNOWNi have used systick as timestamp and and also cross verified with heap and stack, rotating the sensor in 3D space 8 direction everting tried but nothing got work..... got stuck at this point.could anyone please let me know what might be the problem.Thank you!!!ANIL.  

Hello,For a predictive maintenance project on an STwinkT1B board. I am using an iis3dwb vibration sensor.When retrieving the data provided by the sensor, one of the obtained values is saturated close to 65535, which is close to 16 bits.I am using the FIFO_continues mode and registers 0x78 to 0x7E to read the FIFO.To summarize:data_buffer[j] = raw_buffer[i] << 8 | raw_buffer[i+1];with j ranging from 1 to 3 and i ranging from 0 to 7. Please advicesRegardsRapha

Hi, I need some clarification about digital high-pass filter in LSM6DSO since the datasheet and application note for LSM6DSO seem to lack explanation about certain features of it (or I just didn't get it).1. In on page 20 of AN5192 (refer to the image below) showing a table of accelerometer bandwidth selection in mode 1/2/3, it has a list of max overall settling time (samples to be discarded). Does this max overall settling time referring to only the initial period of time when the HP_SLOPE_XL_EN bit is set to 1 and the accelerometer starts producing data or is it referring to the periods from time to time when there are abrupt changes in the accelerometer reading?2. On the same page I mentioned in question 1, it briefly talks about fast settling mode but it doesn't really talk about how fast it shortens the settling time of the low-pass/high-pass filter of LSM6DSO. How fast does the fast-settling mode do the job for either filters? Is there any specific specification about it?3.

Hi,I am using AIS2IH.I  can see in terminal   window of my computerthat registers of  data and temperature are zero's.   0 0 0  ...My program use the setup: ais2ih_cs_mode_set(&dev_ctx, AIS2IH_PULL_UP_DISCONNECT);ais2ih_i2c_interface_set(&dev_ctx, AIS2IH_I2C_DISABLE);ais2ih_spi_mode_set(&dev_ctx, AIS2IH_SPI_4_WIRE);ais2ih_reset_set(&dev_ctx, PROPERTY_ENABLE);platform_delay(0x00333333);ais2ih_reset_get(&dev_ctx, &rst);platform_delay(0x00333333);ais2ih_reset_get(&dev_ctx, &rst);platform_delay(0x00333333);ais2ih_cs_mode_set(&dev_ctx, AIS2IH_PULL_UP_DISCONNECT);ais2ih_i2c_interface_set(&dev_ctx, AIS2IH_I2C_DISABLE);ais2ih_spi_mode_set(&dev_ctx, AIS2IH_SPI_4_WIRE);/* Set full scale */ais2ih_full_scale_set(&dev_ctx, AIS2IH_2g);/* Set Output Data Rate */ais2ih_data_rate_set(&dev_ctx, AIS2IH_XL_ODR_400Hz);ais2ih_filter_path_set(&dev_ctx, AIS2IH_LPF_ON_OUT);ais2ih_filter_bandwidth_set(&dev_ctx, A

Can I use the STHS34PF80 outdoors?This is because ToF sensors cannot be used outdoors.

Further to this earlier post, any chance now is a BMA400 SPI library already ported to STM32CubeIDE?Many thanks

I am using the STM driver to control the LIS2DH12TR accelerometer.The freeRTOS sensor task is as following (checks on return values and variables definitions are removed to simplify the code comprehension): void MEMS_task(void) { lis2dh12_self_test(&dev_ctx); result = lis2dh12_operating_mode_set(&dev_ctx, LIS2DH12_HR_12bit); result = lis2dh12_data_rate_set(&dev_ctx, LIS2DH12_ODR_100Hz); result = lis2dh12_fifo_mode_set(&dev_ctx, LIS2DH12_BYPASS_MODE); result = lis2dh12_block_data_update_set(&dev_ctx, PROPERTY_ENABLE); result = lis2dh12_temperature_meas_set(&dev_ctx, LIS2DH12_TEMP_ENABLE); for (;;) { result = lis2dh12_xl_data_ready_get(&dev_ctx, &acceleration_data_available); if (acceleration_data_available != 0) { /* Read accelerometer data */ memset(data_raw_acceleration, 0x00, sizeof(data_raw_acceleration)); lis2dh12_acceleration_raw_get(&dev_ctx, data_raw_acceleration); acceleration_mg[0] = lis2dh12_from_fs2_hr_to_mg(data_raw_