MEMS (sensors)

Hello.I have a small fan at home with STEVAL-MKI245A attached and STEVAL-MKI109V3 is near the fan as well,like you would using PROTEUS1.The fan offers 3 mechanical switches to modify the speed.Using the switches causes a stop of reading data from the sensor in MEMS Studio.I tried Linux, Windows and MacOS with STEVAL-MKI109V3 (Firmware: 3.67.1) always with a notebook detached from a power source.Sometimes under "Sensor Evaluation / Data Monitor" the message "Log data view not active at high data rate" appears, regardless which scale setting or Output Data Rate is used.Many times the Accelerometer and Gyroscope Output Data Rates are set to "Power Down" automatically,respectively register CTRL_1 and CTRL_2 are set to 0x00 and I don't know who is doing this.In this case I'm not able to write different values than 0x00.The only solution is to reset the board.I'm worried to use it in industrial environment even i

Hi, we are using ASM330LHB. How many times we can perform self test (in static condition) for ASM330 in its lifetime? Is there any limit OR can we perform self test unlimited times? If there is any limit please mention the count.Thanks in Advance,Pavani

Hello,both of MotionFX 6X and MotionDI return the same output (rotation vector, quaternion, gravity, and linear acceleration)so what is the difference between theme, and witch one is more suitable for 6 axes fusion ?should i implement additional calibration Lib ? like MotionAC and MotionGC ?Thank you,Sincerly. 

we are using this LSM6DSL sensor for our smart ring device. and we also implement step counter which is inside of this IC to calculate step for user, while he wears the smart ring on his finger.I'd like to know if there is any performance difference between watch and Ring in terms of step counter. Or I'd like to know if there is any case of Ring usage of this IC.

Hi,  I am looking at the LSM6DSO device, and I am unclear what the "USR_OFF_ON_WU" bit does in the "WAKE_UP_THS " register. Does this bit: Drive the Wake-Up function with offset corrected accelerometer data? 0 means not offset corrected, 1 means offset corrected?What does this have to do with High-Pass Filtered Data? Does this bit actually set whether Lowpass or Highpass information is used to drive the Wakeup Function?  Can someone please provide clarity? thanks

Hi,    I'm looking through the LSM6DSO32X datasheet, and I'm having a hard time finding out information about certain register data bits. For instance, register "WAKE_UP_THS" (0x5b) has 6 bits labelled "WK_THS[5:0]". Are these bit signed or unsigned? I assume they are unsigned, but I would appreciate confirmation.  thanks 

My team is looking at what performance data ST has on file for the ASM330LHB. Specifically ​random walk and bias stability performance of accelerometers and gyros over the entire operating temperature range (-40C to 105C).

good morning. i am actually trying to load on my an sd card my data of the sensor tile.box. Unfortunately, I only get blank tables with only the top written. I uploaded a configuration to make it and then uploaded as seen on those photos. am I missing anything?i have also a question on those parts of the application, I do not know what they are made for

Hello,I need help with the STEVAL-MKI223V1K and STEVAL-MKI109V3.I get a message from the Software MEMS Studio: The sensor has not been recognizedThe WHO_AM_register value does not match the device selected.Any help will be appreciated.Thanks. 

WE have got the Library from ST for nordic Cortex M33 Processor after signing the agreement, and tried to use it for the integration: Sensors used are LSM6DSOX and LIS2MDL.the NCS zephyr uses -mfloat-abi=hardOn using the Library The MotionFX_CM33F_wc32_ot_hard.a It gets  compiled but in debug it gives error when the deice connects the Bluetooth."MFX empty_attitude   file motionFX.c"What may be the issue here? RegardsVivek 

Hello everyone,I have an X-NUCLEO-IKS4A1 expansion board connected to the STM32F401RE Nucleo board. The LIS2DUXS12 sensor on the expansion board incorporates a Qvar sensor capable of detecting changes in electrical charge near the external electrodes connected to the device. I have a detachable STEVAL-MKE001A board connected to the 2 x Header 3pin SMD for QVAR electrode.To activate the Qvar channel I set the AH_QVAR_EN bit to 1 in the AH_QVAR_CFG register (31h) and I set the INT1_ON_RES bit to 1 in the CTRL1 register (10h) so that the INT1 and INT2 pins are used to connect the electrodes to detect the Qvar signal.The problem is that the signal I read does not vary when I touch the electrodes as it happens when the LSM6DSV16X sensor as Qvar controller.Did I skip any steps by chance? It looks like the INT1 and INT2 pins of the sensor are not connected to QVAR1 and QVAR2

Dear all,A newbie here. Any help is much appreciated. I appreciate this is an STM forum and while I am using ESP-IDF to interface with STM's lsm303, I believe the problem is caused by my incorrect configuration of the STM lsm303 sensor. Hence any guidance is much appreciated.I am using an LSM303 sensor, connected via I2C to an ESP32 and programmed via ESP-IDF to retrieve the magnetometer and accelerometer data. I was previously using an Ardunio and the the Pololu LSM303 library and everything worked with the same wiring.However, when using bare i2c in ESP-IDF, it seems like I have messed something up as the magnetometer data freezes unless I power cycle the LSM303 (rebooting the ESP32 doesn't seem to change the readings, while unplugging the VCC o

Hi, I'm looking at the FSM capability of this module, and I'm having a hard time finding meaningful examples. The ST examples found here seem to contain meaningless strings.  "Ac 01 80Ac 04 00Ac 05 00Ac 5F 0AAc 46 01Ac 47 00Ac 0A 00" Am I missing something here? How do I learn how to use the FSM? The AN5226 document may contain all of the information but I'm feeling a lack of how to put it together....  thanks 

Hey, I have been using the AIS2IH accelerometer senson in my TI's am652 linux based board.i found the linux iio driver for this in the github of ST. click to view the supported driver for ais2ih. Click to view the driver files (named as lis2dw12).  i copied the files (lis2dw12.h,lis2dw12_core.c,lis2dw12_spi.c,lis2dw12.i2c,lis2dw12_buffer.c,lis2dw12_embfunc.c) to my linux (drivers/iio) directory. i created Kconfig and Makefile and also defined in the devicetree and in defconfig and built an image in jenkins and the image built was success without any errors. but t

Hi, in my application I intend to use the LSM6DSV16X in order to store accelerometer, gyroscope, SFLP and QVar data, all at the same time.I am able to get XL, G and SFLP data from the FIFO on INT1 correctly, and now I want to also record QVar data.Based off of the example provided here: https://github.com/STMicroelectronics/STMems_Standard_C_drivers/blob/master/lsm6dsv16x_STdC/examples/lsm6dsv16x_qvar_read_data_polling.c , I was able to get QVar data alone by routing it to the INT2 pin, however when I also enable the FIFO, I don't receive the data ready interrupts anymore.Is there an incompatibility between these functions that I missed by reading the datasheet ? Here is the code that I am using to set up the sensor (the commented out section are t

Hello!I recently designed a custom PCB with an LSM6DS3TR-C IMU. However, it doesn't seem like it responds to I2C and I wonder if anyone could take a quick look at the schematic I have for it to see if I've done a misstake. VCC in the schematic is 3.3V.Help appreciated :)

Long story short, I'm trying to use the MLC algorithm from the BLEMLC sample for SensorTile.Box Pro. However, I can't seem to read any output from the MLC. The MLC is working fine in the BLEMLC sample, but when I try it in my own file, it does not work. I've tried modifying the BLESensorsPnPL file with the MLC, and it still does not work.

Hello, I'm having trouble interacting with the SensorTile Box Pro through the BlueST protocol. I've used the ST BLE sensor app to set the device to stream compass data, I used the included example and did not change anything. In the app, I can receive compass data without a problem with its included visualiser. I then used the Lightblue app to receive the same data, and it worked without a problem. I used the

Hi all,About 25% of the LSM6DSOX sensors in the field have a non-functional pedometer. The step count is showing as zero. A power-on reset or software reset does not resolve the issue. We rely on the step count provided by the pedometer module, but it is consistently reading zero. The wake-up interrupt is working correctly, but the step count interrupt and direct reading from the step count register both return zero. Please assist in addressing this issue. This is very critical as we are replacing a lot of devices because of this. Thanks,Vishnu Pradeep

Hi,  I am reading datasheet of LSM9DS1, and a little conccerned about the following part:  Especially about the text: "When a FIFO threshold interrupt occurs, the first data has been overwritten and theFIFO stops collecting data from the input channels."Why first data have to be overwritten? It looks more naturel not to be overwritten in FIFO mode. Thank you in advance.

Hello,I'm working on a project where I use the LSM6DSRX. I have noticed that the Gyro has a strange behavior, reporting peaks on the X axis while the device is solid static. The peaks may be correlated to the temperature change but it's not clear yet. I did run a test, on ambient temperature range +5C to +30 with two end-devices (DUT1 & DUT2) and one of the two reported the peaks on X axis at around 33C (internal temperature) while the other not. Is this something you have ever experienced or reported by any user? Since now all of my experiments shows that it is device related and not system related. I have replaced the LSM on some of the faulty and the issue seams to have been resolved. I have taken X-ray scans to verify that the soldering is acceptable and it is. Following raw data as read from the sensors Gyro from 3 different devices. You may see the noise coming after a few minutes with a duration of around 50-60 minutes The samples are taken every

Posted on February 15, 2017 at 16:29Hello,I have an EVALSTPM34 board.I am trying to access the board via the UART using the 'STPM3x Evaluation Software' v3.1.0.0J7 has 3.3v supply attached. J2 has TTL-232R-3V3 cable attached.PC recognizes the TTL-232R-3V3  as COM5.J3 jumper is removed.SW1 has all SWs in ON position.I start up the STPM3x Evaluation Software.Options > Interface = USRT, COM5, 9600I press 'Open' and get success.Options > Configuration > Application tab = EVAL-STPM34I press 'Apply' and get a pop-up dialog box that says:Read buffer lenght insufficient.   < Yes, 'length' is mis-spelled.The operation has timed out.Has anyone had a similar experience?Is there a newer version of the 'STPM3x Evaluation Software' ?Rob ParsonsSchneider ElectricKnightdale NC US

Hello, I have been working on a project using the H3LISD331Dl accelerometer set at +-400g and the STM32U585OI MCU. I wish to capture the high G shocks that occur during drop testing. I have completed my project and I am just wondering how accurate the results I am getting are. I secured my PCB inside an enclosure and did drops from various different heights focused on different axis. I attached .csv files for 3ft and 6ft drops focused onto the Z-axis. I plotted the data I got in excel and the increase in g's seem to correlate with the increase in drop height. Is there any way to guarantee the accuracy of the values I am recording? 

Hey! If I well understood the component IIS328DQTR will be at least "NRND" in 2025. The IIS3DHHC seems to be a good substitute but it doesn't have all the interrupt features of the IIS328DQTR. Can you confirm the lifetime of the IIS328DQTR? Do you have a 3-axis digital accelerometer with the feature: "The device may be configured to generate an interrupt signal through inertial wakeup events, or by the position of the device itself."Kind regardsCharles D 

Hello ST Community,I am currently working with the STHS34PF80 thermal presence sensor and utilizing the TMOS10-12030 lens to increase the field of view (FOV) to 120 degrees. However, I am encountering several issues that I hope you can assist me with:Limited FOV: Despite using the TMOS10-12030 lens, the FOV is still limited to around 25 degrees instead of the expected 120 degrees.Unstable Presence Detection: The sensor’s presence detection appears unstable, with limited detection range and frequent false positive detections and   negative detection (can't detect humans in front of him with in 1meter range) .Given these challenges, could you please provide any recommended configuration settings or adjustments to the sensor or lens setup that would help improve:Field of view (achieving the full 120 degrees)Detection stability and