MEMS (sensors)

I am new to a lot of this and could use some help.  I recently started a new job and my first project is reliability for one of our bread and butter products.  I am evaluating better bearings, seals, etc. and am going to use the Proteus mounted on the equipment to monitor motor vibration.  I have everything mounted and I can watch the sensor outputs from the app on my phone but I really need to be able to use the USB connection to connect the Proteus to my laptop so I can log the data.  Is there a desktop program that I am just not seeing?  I can't get my laptop to recognize the Proteus when connected via USB.  I am hoping to only use USB and not the battery.  Is there an expert out there that can give me a hand?  Thank you! 

I tried all 3 available demos: default, FP-AI and Datalogger.At last I flashed the original default demo back. All tests are done USB-powered or with LiPo.Establishing a BLE connection with iPhone works in 10% of the cases.Using an Android smartphone is more successfully.All issues found:- No plot data of gyro and accelerometer, but FFT and Board Pred Maintenance worked.- In plot data the axes and 3 colored lines were shown at zero level, but no lines are changing (regardless autoscale setting).- FFT shows sometimes lines horizontically like in plot data, no vertical bars and frozen.- Or no sensor data at all, but I can turn on/off LED (very nice)- Or plot data does not scroll, lines were drawn back and forth- BLE interrupted on iPhone Version FW: WB5MMG_STSW-PROTEUS_1.1.0 (from STEVAL-Proteus1 package) BLE-CbMHaving the latest BLE stack from Github (V1.20.0 build 2), because one ST emplo

I am conducting research on robot control, and to handle data obtained from the LSM6DS3H embedded in the robot, I want to understand how acceleration and angular velocity are measured. Specifically, I would like to learn about the internal structure of the accelerometer and gyroscope within the LSM6DS3H. My general understanding is that the structure consists of a mass connected to other parts by springs, and acceleration and angular velocity are measured based on voltage changes due to the compression and extension of these springs. The specific information I am looking for includes the following:Diagrams illustrating the connection between the springs and the massSpring constant and damping coefficientMass of the weightNatural frequency and damping ratio of the spring-mass systemFormulas used to calculate acceleration and angular velocity.Any information on these points would be greatly appreciated.

Hello  I have my oven custom board in which I used accelerometer (LSM6DSLTR), magnetometer (IIS2MDCTR) and STM32L4 series controller. Initially I tried to get north heading through magnetometer but due to external noise some time I am getting proper north heading but some time getting wrong orientation. I tried soft Iron and hard iron compensation but due to variable soft iron some time I am getting wrong north heading. I was trying to use e-Compass library but still don't get proper orientation. I have following two questions. 1) Can we use e-Compass library for custom board in which LSM6DSLTR accelerometer and IIS2MDCTR magnetometer is used. 2) I am using my custom board in very noisy environment in which standalone magnetometer is not capable to calculate proper north heading. I also used hard iron and soft iron still getting wrong north heading. so is it possible to calculate proper north heading using accelerometer and magnetometer fusio

HI,Is there any way to reset SFLP "Game vector" readings at runtime, once SFLP enabled?For instance, after few minutes of SFLP run, it reports (after quaternion to Euler conversion) YAW: 1.5, PITCH: 0.5, ROLL: 0.1. And I'd like to reset Yaw to 0 (zero). Is there any way to do so on chip (manipulating offsets, "soft" algorithm reset etc.)?Surely it is possible to use external matrix to compensate for the above in software but maybe there is some "undocumented" way to ask SFLP to do the same? Thanks

I am trying to get data from ASM330LLHXG1 so first, I decided to try the self test code provided by ST to see whether I can make the sensor work, until the reading of status register it was going okay but no matter how long I wait the status register data ready flag for both gyro, accelerometer, and temperature are all zero. The code is stuck at while(!drdy) : /* Check device ID */asm330lhhxg1_device_id_get(&dev_ctx, &whoamI);if (whoamI != ASM330LHHXG1_ID)while(1); /* Restore default configuration */asm330lhhxg1_reset_set(&dev_ctx, PROPERTY_ENABLE);do {asm330lhhxg1_reset_get(&dev_ctx, &rst);} while (rst); /* Disable I3C interface */asm330lhhxg1_

Hi. I'm currently working with the Blue SDK and trying to detect any falls from the SensorTile.Box Pro. The device is able to detect falls, but I am unsure of how to send that data over to my android application. I have a modified BLESensorPnPL demo project calling the BLE_MachineLearningCoreUpdate() function once it detects a free fall. Any help would be greatly appreciated!Also, how does the BLEMLC demo project communicate with the STBLE Sensor Application?

Hey,I'm trying to print the data from the gyroscope L3GD20 of the STM32-F411E Discovery board ( Board Ref:MB1115B) using stm32CubeIDE.Is there a library I can use for the gyroscope, Or does any one can guide me through creating the project as it is the first time I'm doing this.Thanks !

Does the IIS2MDC require burn-in? Using the IIS2MDC, I read a magnetic filed of 0.47 Gauss on a Friday. I read the same result the Monday morning at 10 am. Two hours later, I was reading 0.4 Gauss magnitude. The individual axes were also quite different, which caused heading deviations beyond acceptable levels. My reference magnetometer did not show any variations during this time. In addition, temperature varied by < 1 deg Celsius, from 25.6 C to 24.8 C. I am trying to determine why only the IIS2MDC had so much variation in such a short period of time.

Hello,I am using the LSM6DSOX IMU to detect a double tap. The IMU is connected to SPI1 of a STM32U5 and the INT1 pin is connected to a GPIO (PB2) of the STM32U5 configured as external interrupt.Sometimes the double tap detection works correctly but suddently the INT1 pin is not triggered anymore even though a double tap is performed.At the same time I am also sampling the acceleration from the IMU via SPI and I can see that this still works. Meaning that the IMU is still working. I also have a SD card connected on SDMMC1 and I notice that when I write data on the SD card periodically, at some point the INT1 pin stops triggering. When I don't write any data, the INT1 pin works as intended.Do you have any idea why the INT1 pin is not triggered anymore? I checked the level of the INT1 pin with a logic analyser and I see that it stays low, meaning that the issue comes from the IMU and not the STM32U5. Ho

Hi,I am using h3lis331dl accelerometer with imx8mp and also using the default st_accel and st_accel_i2c drivers in Linux. Most of the part works correctly. I am using udevadm to monitor the trigger in C# code./bin/udevadm monitor iio:device0This works when I manually trigger with the command "sudo udevadm trigger /sys/bus/iio/devices/iio:device0"Is it the right way to monitor the trigger/interrupt?Also, in_accel_*_raw and in_accel_*_scale files are available in /sys/bus/iio/devices/iio:device0 directory. How can I calculate the acceleration with the raw, scale and mount_matrix? Could someone please help me?Here is the device tree node: accelerometer@19 {compatible = "st,h3lis331dl-accel"; pinctrl-names = "default";pinctrl-0 = <&pinctrl_accel>;reg = <

I am using a STM32F401RE board with the X-NUCLEO-IKS4A1 expansion board. I configure SFLP on the board in order to get the quaternion values ​. The commans I used are:"fifo_sflp.game_rotation = 1;fifo_sflp.gravity = 1;fifo_sflp.gbias = 1;lsm6dsv16x_fifo_sflp_batch_set(&dev_ctx, fifo_sflp);lsm6dsv16x_fifo_mode_set(&dev_ctx, LSM6DSV16X_STREAM_MODE);lsm6dsv16x_xl_data_rate_set(&dev_ctx, LSM6DSV16X_ODR_AT_30Hz); // ODR dell'accelerometrolsm6dsv16x_gy_data_rate_set(&dev_ctx, LSM6DSV16X_ODR_AT_30Hz); // ODR del giroscopio

  I BOUGHT STEVAL- MKBOX PRO AND AM THINKING OF USING IT. I have a wireless function, but please tell me the status of technical conformity approval for use in Japan. There was no conformity mark on the package.

I am using the FP-IND-PREDMNT1 STM32Cube function pack for predictive maintenance in STEVAL-STWINCSV1 board, which performs vibration analysis using a 3-axis accelerometer (3 DoF). My use case involves motor vibration analysis. Would it be beneficial to use 6 DoF or 9 DoF data for more effective monitoring?

HiI have a custom pcb design with a lsm6dsv and lsm303agr. So far it is only streaming xyz coordinates.I need to come up with something like a rotating dice in this Video at minute 5:20 :https://www.youtube.com/watch?v=1mV_L-KEMy0In fact i need to Show the orientation of human head and not a dice.Which Tutorial or example project do you recommend as starting point?Is it correct that with lsm6dsv the Gyro has a good Performance, so i dont even need the magnetometer for drift correction?Is lsm6dsv the right chip, or is a better pin compatible chip in the lsm6 family?

The filter link of asm330 gyroscope includes LPF1 and LPF2, in which LPF1 can be configured with bandwidth, and LP2 is related to ODR. May I ask how much phase shift is corresponding to each filter in different bandwidth or configuration mode? Or could you provide the transfer function of the gyroscope? I need to analyze the frequency characteristics of the gyroscope under different configurations to meet the requirements of the system I designed, thank you!

Hi,     Is there a way to perform a wake-up interrupt using the LSM6DSO, based around gyroscopic data instead of accelerometer data?  thanks 

Hi,  I am integrating nrf5340 With STEVAL-MKI197V1 Adapter PCB. We are using I2C interface to communicate. As per the LSM6DSOX datasheet, We need to pullup CS Pin for selecting I2C communication and SDO/SA0 pin status (Either connected to Pull up or Pull down) will determine the LSB Address.I am observing that, Communication is getting established even though CS pin and SDO/SA0 pin are left open. Another observation is, LSM6DSOX is responding only to address 6b. When we try to communicate using address 6a it doesnot acknowledge. Can you clarify why we are getting response without CS Pin and SDO/SA0 pin not mounted and why only for address 6b. Thanks and 

1) What capacitance does the LIS2DW12TR introduce to the I2C bus lines?2) What is it's maximum bus capacitance threshold in normal I2C mode (100khz)?The datasheet doesn't have info on either of these points. It only quotes that the max bus capacitance in fast/high-speed mode. Help here would be great as I'm calculating the RC constant on my I2C lines, as I think they're causing I2C to not work! Thanks!

GreetingsI am working with the LIS2DW12 accelerometer. I am using the device in Low Power Mode 1, with a FS = +-4g.According the application note AN5038, page 15, it says that the Low power mode 1, entails a 12 bit value. Thus, using the 16-bit value from the output registers for each axis, it should be divided by 4, and multiplied by 1.952:  Acceleration in mg = (16 bit hex value from both output registers)/4 * 1.952 Acceleration in mg = (16 bit hex value from both output registers) * 0.488    However in the GITHUB example code, found at the link (line 128)  float_t lis2dw12_from

Hello,Our custom HW uses a LSM6DSM sensor.  There is no existing driving for it in Zephyr, however, the LSM6DSL sensor does. I looked at the differences between the 2 devices and it comes down to the LSM6DSM having 2 extra connection modes (Modes 3 & 4), and 4 registers that are accessible in AuxSPI mode (which we're not using).  The LSM6DSM on our board is configured for connection mode 1 and is an I2C slave to the nRF5340. Is the LSM6DSL driver compatible with the LSM6DSM? If not, is there a LSM6DSM driver for Zephyr?The reason I'm asking this is because I had tried using the LSM6DSL Zephyr driver on my board and I'm getting an I2C write error during device initialization. I've verified that my device I2C works because I can read/write to it via the Zephyr I2C shell commands.Thanks.

we are using LIS2MDL magnetometer calculate yaw (Angle) data. we have integrated the LIS2MDL 3-axis magnetometer along with the ISM330DHCX. However, the resulting yaw data fluctuates, even when the sensors are stationary (without motion).From our understanding, the output should remain stable when the sensors are at rest, but this is not reflected in the results. We have also tried implementing Kalman and complementary filters, but have yet to achieve the expected outcome.Our setup is as follows:            - The controller used to communicate with the ISM330DHCX and LIS2MDL is an Arduino UNO.            - The communication protocol used for both sensors is I2C.We are not sure what might be going wrong while trying to get angle data from the sensors. any inputs would be greatly helpful..

Hi,I'm now evaluating STHS34FP80 on our original board.I've tried PMMA and BK7 glass for cover material but It seems not work well.Is there any proper material for STHS34PF80 cover?If you know the specific material name, please let me know.Thanks,

Dear,    I want to know if running multiple algorithms like tap detection and activity recognition both can be run in LSM6DSO16IS simultaneously.Thank you.

Hello,ASM330LHB 6-axis sensor, can it reach 0.001g?ASM330LHB 6-axis sensor that can reach 0.001g? how high can it reach?Which 6-axis sensor is more accurate?Can they both output angles? This post has been translated from Chinese to comply with the ST Community guidelines.