MEMS (sensors)

We bought the LSM6DSOX and installed into our equipment since 2021, please help to evaluate whether we need calibrate it. Are there any conditions that the sensor must be calibrated? Please show us the detailed steps for calibrating the sensor. Since the output acceleration information is very important for our application, could you 1) give us some reliability data from customer market (especially in Aviation Industry, we called FMEA: Failure Modes and Effects Analysis); 2) show us some basic principles for generating the acceleration data. From spec and application note of LSM6DSOX, we found it can support motion/stationary recognition, please show us more detail information with the reliability of this recognition and how to implement this function during practice. Are there any limitations or key points for installation of this sensor?

Hi, I am trying to confiure my FSM on LSM6DSV320X chip following the instructions from AN6291LSM6DSV320X: finite state machine document. But in the document on page 52 line 18 it says: Write 41h to register 02h // PAGE_SEL = 4. But there is no description about "page 4". I would be really thankful to be helped with this issue. I look forward to hearing from you. Thanks and regardsY@TDK @Andrew Neil 

I am using an LIS2DH12 sensor with an esp8266 via I2C. It is the only sensor on I2C. I have a process loop that repeats every 200ms. During this loop, it is recording some other pin inputs and analog inputs, and sending the data to another esp8266 via serial. With the LIS sensor commented out, the maximum loop time is 5ms.With the LIS sensor reading active, and reading it every 200ms, the maximum loop time including the LIS reading varies from 10ms-45ms. So the LIS reading is taking between 5-40ms. My question: There is a strange pattern over the span of 1.6 seconds. Consistently the loop time progresses 45-41-36-31-26-21-16-11ms, only to repeat again 45-41-36-31-26-21-16-11ms.What is causing this pattern? Is the sensor itself doing something in this 1.6 second time period?Thanks!

Hi,Recently we bought & recived components (MPN LIS2DH12TR) from distributor (Mxxxxx) are over two years old date code, which exceeds the threshold for our internal testing policy.As you know, there's a potential risk of pad oxidation affecting solderability over time.For our validation process, we conduct solderability tests on:Active components that have exceeded 2 years of storage. (Apply to this component) Passive components that have exceeded 5 years of storage.Does STMicroelectronics has any official statement confirming that the shelf life of these LCA leadless pads ? We would want to confirm the product recived direct from distributor (Mxxxxx) which more then xx period are still useable or not direct into our production. Best regards,Mr. WengSupplier Quality Engineering

I want to read acc data by fifo, but int1 can't work. I think there might be something wrong with my setup, but I can't figure out where the problem lies. This is my code. /* Wait sensor boot time */ platform_delay(BOOT_TIME); /* Check device ID */ whoamI = 0; iis2iclx_device_id_get(&dev_ctx, &whoamI); if ( whoamI != IIS2ICLX_ID ) while (1); /*manage here device not found */ /* Restore default configuration */ iis2iclx_reset_set(&dev_ctx, PROPERTY_ENABLE); do { iis2iclx_reset_get(&dev_ctx, &rst); } while (rst); /* Set full scale */ iis2iclx_xl_full_scale_set(&dev_ctx, IIS2ICLX_2g); /* Configure filtering chain(No aux interface) * Accelerometer - LPF1 + LPF2 path */ iis2iclx_xl_hp_path_on_out_set(&dev_ctx, IIS2ICLX_LP_ODR_DIV_100); iis2iclx_xl_filter_lp2_set(&dev_ctx, PROPERTY_ENABLE); // iis2iclx_fifo_virtual_sens_odr_chg_set(&dev_ctx, PROPERTY_ENABLE); iis2

How can I save the magnetometer calibration offset in ISPU, if  lsm6dso16is is connected to a stm32l4.

I am trying to connect the custom board to the mems studio to measure the euler angles and to explore the mems studio? is it possible to connect the custom board?

Hello,I am developing a dynamometer to measure the load placed upon it. To do this, I have designed a spring so that a 1 kg load compresses it by 1 mm. Therefore, I need a sensor capable of detecting the spring's displacement with 1 mm precision.My question is: can I achieve this 1 mm precision by using an STM LIS3MDL sensor? My idea is to place a magnet on the moving base of the dynamometer and create a calibration curve to correlate the change in the magnetic field with a 1 mm displacement. I need to be able to measure in 5 kg increments, which should correspond to a 1 mm displacement for each step.

Hi,We are using the LSM6DSO in our project to find the euler angles.we are new to this motionfx in stm32. please tell us from where we have to start to find the euler angles.Do we need to add any of the files in the stm32?please tell us from the beginning.

We sincerely appreciate your continued support. We have been able to resolve many questions.In the CTRL1_XL register of the ASM330LHH, when setting ODR_XL[3:0] from 0000 (OFF) to 0011 (52Hz) and then to 1001 (3333Hz), does ODR_XL[3:0] need to be set back to 0000 (OFF) once ?

A new sensor has been recently launched on st.com, embedded in existing pressure and iNemo sensors: an electrostatic sensor that can be used for human presence and motion detection, touch detection, and user interface (UI) applicationsQvar stands for electric charge (= Q) variation (= var). It is an electrical potential sensing channel able to measure the quasi-electrostatic potential changes. ILPS22QS and LSM6DSV16X sensors allow to connect an analog input and convert it to a digital signal for embedded processing. In addition, the embedded Qvar channel can be enabled for sensing in applications such

Hi,I’m working with the LSM6DSL sensor and I’d like to know if it’s possible to use both the Low-Pass Filter (LPF) and High-Pass Filter (HPF) at the same time in the accelerometer. If so, could someone explain how to configure it?Thanks!

Dear ST,I am working with the STHS34PF80 PIR sensor on an i.MX8MP platform, using the upstream-style IIO driver (st_sths34pf80). I am attempting to run the sensor in continuous mode (buffered streaming), but iio_readdev always times out with no samples delivered.echo 1 > /sys/bus/iio/devices/iio:device3/algo_resetecho 4 > /sys/bus/iio/devices/iio:device3/lpfecho 200 > /sys/bus/iio/devices/iio:device3/thresholdecho 50 > /sys/bus/iio/devices/iio:device3/hysteresisecho 4 > /sys/bus/iio/devices/iio:device3/sampling_frequencyecho 0 > /sys/bus/iio/devices/iio:device3/events/in_temp0_thresh_rising_en# Enable scan elementsecho 1 > /sys/bus/iio/devices/iio:device3/scan_elements/in_proximity_object_enecho 1 > /sys/bus/iio/devices/iio:device3/scan_elements/in_timestamp_enecho 1 > /sys/bus/iio/devices/iio:device3/scan_elements/in_temp_x_en# Enable

Hi,I'm using IIS3DWB MEMS sensor to get the motor vibration data which will have a bandwidth of 6kHz and need to store it to a 16GB SD cardI'm confused to calculate the data rate, i mean what is the ODR i need to consider?My calculation is :ODR = 26667 and 3 axis 6 bytes, which becomes 160kb/s and 12.89GB/day precisely, which is a lot of data for a dayShould i consider the ODR to be 2x times the bandwidth (6kHz in this case)?Also let me know about the raw data and how can i filter out the 6khz frequency data that i need

Folks,I have an STM32 rigged up via SPI to read gyro data-only from an LSM6DSL. I read it periodically, every 20ms, and for a while it will report back a few hundred samples in FIFO STATUS REG 1 and 2; I empty the FIFO and after another 20ms it reports me a few hundred samples available and so on. After a short time though it reports no samples in the FIFO and after that it will never have any data to report until I reset and restart.Is there a technique for this? Can I not just read out every so often? We don't have the interrupt line connected to the micro, so it has to be done on a polling basis.I can imagine that maybe if you didn't empty the FIFO quickly enough that there might be a bug in the silicon and it might always read back zero, *but* I have set watermark to 2048 and stop on full, yet it still falls over.This is at 1.66k ODR (both gyro AND FIFO). If I run it st a slower ODR it works OK.At 833Hz, the next rate down, I always

The ASM330LHH datasheet CTRL3_C (12h) says:Note: The accelerometer must be ON. This bit is cleared automatically. This bit is cleared automatically. Does ON for the accelerometer mean that ODR_XL[3:0] in the CTRL1_XL (10h) register is set to a non-zero value?

Hello everyone, I'm new to both BLE and MEMS sensor. I want to combine 2 examples code as following:STMems_Standard_C_drivers/lis2dux12_STdC/examples/lis2dux12_mlc_activity_mobile.c at master · STMicroelectronics/STMems_Standard_C_drivers · GitHub STM32WBA Bluetooth® LE – Serial communication - stm32mcu so that i can send MEMS events via BLE/USART. Could someone give me support or instruction, how to combine ?

HelloI have a problem with the accelerometer lsm303agr and the Fifo Stream mode, I have a time offset between 2 watermark interrupts.Configuration :- accelerometer only- watermark interrupt enable on int1- bdu enable- Stream mode enable- Fifo enable- Don't used any gesture recognition, or filter.- i use the spi mode at 500khzDescription of the problem :I used the accelerometer in Fifo Stream mode, the watermark to fire the interrupt on pin int1 when a certain number of data in the Fifo is reached.The odr is at 1hz, i used the rtc of the stm32 (from a homemade board) to collect the timestamp when INT1 trigger.I have notice a time offset for every sample in addition of the ODR configured.I measured it to be around 25ms/samples on top of my 1seconds period (odr 1hz).I checked the timing at the oscilloscope which confirmed that the problem Don't come from the reading of the rtc

I am completely new to using the STEVAL-MKBOXPRO (Sensor Tile.Box Pro) sensor, and I have a problem accessing some of the functions in the ST BLE Sensor app. I can connect the sensor in the app, but when I try to plot the data within the app, I cannot choose anything in the drop-down menu other than "MemsSensorFunctionCompat", whereas I should be able to choose between that, gyroscope, accelerometer and magnetometer.I cannot find the function "Flow" on the bottom of the list with all the options. That is where I am supposed to be able to choose between basic apps and create my own apps in expert mode, but I cannot access it for some reason.More info: I am using the newest version of the new app (not the classic one, but I have tried that too; it also doesn't work), I have deleted and redownloaded it, paired and disconnected from the sensor multiple times. Thank you to anyone who has some information about this in advance!

After activating the accelerometer and angular rate sensor, the temperature sensor value does not change and appears to be frozen. What is the cause of this?Is there any countermeasure?

Hi,I am working on an application where I need to generate an interrupt whenever a tap exceeds a certain acceleration threshold. I have already chose the IIS2DLPC for this purpose.However, on page 58 of the datasheet, in Table 67 for the TAP_THS_Z register, I found the following:"TAP_THSZ_[4:0] Threshold for tap recognition @ FS = ±2 g on Z direction."I would like to clarifyDoes that mean that taps above 2g can't be detected. My application requires detecting relatively strong impacts, ideally up to 4 g, and preferably up to 8 g.If this is possible, could you advise on how to configure the device to achieve this?If it is not feasible, could you recommend any alternative accelerometers from your product line that would meet these requirements?Thanks in advance!  

How to distinguish whether the product LIS3LV02DL is 11+ or 21+ by the printing on the product? There is only a "1" on the product( And no label( 

I am using the ASM330LHH connected to the processor via 4-wire SPI communication. I’m trying to read the WHO_AM_I register, which should return 0x6B according to the datasheet, but I keep getting 0xFF. The CS line is set correctly before and after the transfer. What could be causing this incorrect data read? If the device isn’t found (WHO_AM_I doesn’t return 0x6B) and I still try to read accelerometer and gyro data, and I am getting data, will those values be completely random?

I am developing a wireless sensor to detect vehicles using the IIS2MDC. My main logic is:BOOT -> Init sensor -> Measure environment -> Set detection thresholds and offsets based on environment -> Set interrupts -> Wait for interrupt On interrupt -> Acquire vehicle heading -> Send RF signal to gatewayAfter some hours working properly the sensor starts sending continuous signals without a vehicle or other metalic object nearby. How can i correct this behaviour? Any help is welcomed. Below i'll leave the application code for the IIS2MDC initialization: CFG_REG_A is always 0x90CFG_REG_B is always 0x09CFG_REG_C is always 0x50INT_CTRL_REG is 0x00 on startup and 0x45 on work mode #define IIS2MDC_STARTUP_CFG {0x90, 0x09, 0x50, 0x00} #define IIS2MDC_WORK_CFG {0x90, 0x09, 0x50, 0x45} bool iis2mdc_startup_

Can I operate ODR_XL[3:0], FS[1:0]_XL and LPF2_XL_EN of CTRL1_XL of ASM330LHH simultaneously?Should I set FS[1:0]_XL and LPF2_XL_EN first and then set ODR_XL[3:0]?