MEMS (sensors)

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Hello everyone,I'm working with the LIS2MDL sensor (steval_mki181v1) , i made a connection between it and the nrf5340 and I configured it over I2C with pull-up resistors enabled.-VDD -- > VDD-VDDio --> VDD-CS --> VDD -PIN I2C  :: SCL to SCL et SDA to SDA-GND t GNDCurrent configuration:I2C communication working (i got the chip id 0x40)Block Data Update (BDU) enabledOutput Data Rate tested at 10 Hz or50 HzOffset cancellation enabledContinuous mode enabledI applied the offset XYZ as :: int16_t mag_offset[3] = {0xF500, /* OFFSET_X_REG */0xF800, /* OFFSET_Y_REG */0xF400, /* OFFSET_Z_REG */};However, I noticed that the values I read from the sensor remain almost always the same and do not update as expected, as shown in the photo below.Could anyone help me understand what might be causing this issue or guide me on how to troubleshoot it?Any help would be greatly appreciated. Thank you! 

Connected STEVAL_$MKI243AA board to a nucleo-g491re board using 4 wire spi interface. The spi bus is setup to run @ 146 Kbits/sec. Reading back bad data. WHO_AM_I is 0x48PIN_CTRL is 0x3E Not sure but seem like the device is power

Greetings! I am using the LIS2MDL magnetometer in continuous mode (10 Hz) with hard-iron offset and interrupts enabled. (Full settings: CFG_A: 0x90; B: 0x0A; C: 0x50; INT_C: 0xE5) And I am trying to detect a magnetic object coming near the device. The interrupt threshold I have currently set is 80 (int). The sensor is powered with a stable 1v8.When I leave the sensor to measure and wait for an interrupt in an environment with no stimuli, the sensors that I have at hand all seem to generate weird false impulses out of thin air. They appear in the form of bit/byte flips, that happen only on the MSB part of the 16-bit data block.For example, if I am constantly reading the sensor values (at 10 Hz, same as sensor), there is a possibility that I will read the false vector value from the axis registers. The raw values for the X axis would look like: "0x0028; 0x0027; 0xFF28; 0x0029". As far as I have observed, this has only happened on the X axis (for the ~50 recorded instances, only one

Hello community ,I am going to do 9 axis sensor fusion (6axis accel and gyro + 3axis magnetometer) and got across to the MEMs-Studio suite. I've bought STEVAL-MKI109D for motherboard and STEVAL-MKI217V1 as the shield. STEVAL-MKI109V3 is out of stock at that time.I pluged the USB for STEVAL-MKI109D with mounted STEVAL-MKI217V1, but the STEVAL-MKI217V1 isn't recognised but was recognised as STEVAL-MKI197V1 instead. The features of 6axis are fine but I need to test the 3axis mag also. Here are my software setting.STEVAL-MKI109D firmware was updated to v 0.8.14MEMs Studio  1.4.2

Hello,I am developing a custom application that uses your ISM330BX IMU. I am communicating with the IMU using I2C. I checked that I can commuicate correctly with it by requesting the ID in the WHO_AM_I register and everytihng seems to work fine.The end goal is to get the LPSF block to work and output data to the fifo where it's going to be read by the main MCU. So far I tried following the info in the datasheet and the application note AN6109, but with little success. Every time I try to read the TAG of the data in the FIFO, the IMU always returns 0x02.Please find below (and attached) the two functions I use to set up the IMU and read from the FIFO. I am sure I might have missed something in the configuration, but I can't seem to figure out what.Thanks for the help.Kind regards,Marco// accel/gyro control #define CTRL1_XL 0x10 // XL ODR & mode :contentReference[oaicite:1]{index=1} #define CTRL2_G 0x11 // G ODR & mode :contentReference[oaicite:2]{index=2} #define CTRL3_C 0x12 //

Hi.I'm working with the FSM in LSM6DSO. I'm able to program detection which I want, but I struggle to do something like "fail-safe" to avoid the algorithm to stuck in the middle of the detection.For example, I want to do a "throw" detection of a thing. The accelerometer is in the thing.I can simply wait for enough acceleration in -X (in my case it will be always in this axis), then wait for the "fly" of the thing, where simply I can use norm V, which must be almost 0, as it's almost free fall, and it must fly for some time.But I struggle to do some timeout to jump out of the fly detection, when there is no any, after e.g. 1s.The problem is, that I can't use 2 timers (there is only single TC), because from manual, every time when comparison is done, the TC is loaded automatically and even when setting SCTC1, it loads anyway when I do comparison of 2 different timers.Here is the example in the MEMS studio: Now the FSM is able to stuck at S4, where it will wait for the "fly" det

Hello,I'm trying to write to configuration register of P3T1750 sensor, I can perform this with I2C protocol but it not successfully with I3C, the sensor still ACK the write command but it NACK the read command to configuration register. With the temperature register i can read value with I3C.I just want to confirm that this is I3C/I2C sensor but the configureation register only r/w by I2C controller, right?

Hello,  I am trying to use a proteus1 to monitor temp and vibration on a spindle and i just cant seem to find the best way to do this. I would  like to use a cloud so I can monitor it off site and get a notification if the temp rises above a threshold. what would you recommend. I have tried the azur cloud i can get the device to connect but then in the classic app i can not get it to send any information. I have tried almost all firmware versions and just cant seem to crack this. Anything will help. Thank you,

Hi everyone,I am struggling to get MotionFX (9-axis sensor fusion) working on an STM32L476G-DISCOVERY board using the onboard LSM303C (Acc/Mag) and L3GD20 (Gyro).The Problem: Despite the library being initialized and updated in the main loop, all outputs (data_out.rotation, quaternion) remain strictly at 0.0.Current Status & Observations:Hardware CRC: Enabled and verified. The CRC->DR register changes value constantly, proving that MotionFX_update is processing data.Timing: The loop is running at 100Hz. I've tested with both a calculated dt and a fixed dt = 0.01f, but the output remains zero.Input Data (data_in):Acc: ~1.0g on Z-axis when flat (normalized to g).Gyro: Normalized to dps (values around 0-5 dps at rest).Mag: Values around -500 µT (normalized using 0.58f LSB for 16G scale).Memory: mfx_buffer is 2450 bytes and aligned to 32-bit (uint32_t array).Configuration: * mfx_knobs.output_type = MFX_ENGINE_OUTPUT_NED;Library enabled in both 6X and 9X modes.

Hello,I have two technical questions regarding the lis3dh accelerometer behavior and interrupt configuration.1) Are the values I read from the LIS2DUX12  in m/s²????  Exemple :::Accel [LIS3dh] 28807220458ns (-7.300384, -1.942303, -5.712095)2) Interrupt logic (INT1_CFG :: XLIE / YLIE / ZLIE)When I configure an interrupt threshold, for example 5 m/s², and enable the axis event bits in INT1_CFG XLIE / YLIE / ZLIEDo the Low events correspond to the following type of comparison?X < threshold, Y < threshold, Z < thresholdOr do they correspond to:|X| < threshold, |Y| < threshold, |Z| < thresholdFor instance, if I have the following measured values and the interrupt threshold is set to 5 m/s²:Would this condition trigger an interrupt or not, according to the configured AOI ,XLIE / YLIE / ZLIE  (i put 1 for this register)???Accel [LIS3DH] 29380340576ns (-18.442175, -19.566559, -19.461311)Thanks for your response  

Hi,I am using IIS2ICLX MEMS accelerometer in an IOT device.The IIS2ICLX is soldered on a PCB that sends data to internet every 10min.To measure the zero-g level of both x and y axis, I suspend the device from the ceiling so that the PCB (and the accelerometer) is perfectly horizontal and and vibration-free.I noticed that the zero-g level changes if I briefly touch the device, and wait for the device to return to its horizontal position (the temperature of the device does not change).Does anyone has an explanation ? I there a way to minimize this effect by using two redondant accelerometers, with a 90 degre rotation between them ?Thanks for your help.

Hi. I have been looking at the internal operation of MEMS devices and am looking for information on how this sensor takes the reading from the mechanical parts. I am trying to find out if this sensor uses capacitive sensing or frequency drift and time period for one sample to be acquired from the MEMS structure. The available documentation does not list much information of this and any additional information would be great. Thanks.

Hello everyone. I would really appreciate if someone could help me sort out a really annoying issue i have with a new STM32WB5MMGH6 based board i made.On this board i have two sensors connected to the same SPI interface (hspi2) with different CS pins to address the sensors. Here's the schematic sections of the two sensors : MS5607 :  LSM6DSV320XTR with an auxiliary IIS2MDCTR tied directly to it (for the test board, the magnetometer is not soldered yet):I'm currently on test phase, and the MS5607 is responding correctly. But the LSM6DSV320XTR does not respond at all. i'm not even getting the whoami ID (i get a 0).For the SPI configuration i have this : For the 2 Chip Select pins i have this config :   I don't understand where the problem comes from. Could someone help me asap ? I'm losing hope :(

I am using MEMS Studio to evaluate FSM and MLC on the STEVAL-MKI109D + STEVAL-MKI238A . I noticed few strange things. I am attaching my FSM gui config and reg config (config.zip)1. When I open the FSM tab and load the state machine files and device configuration fileone thing I notice right away that its not loading the Long Counter Max value correctly.In my saved FSM configuration I have set it to 0x14 but when I load the configuration it still showing up at 0001Now when I click "Write FSM configuration to the sensor" button and head to Register Map tab, I do see 0x14This is very misleading as the FSM configuration tab is different value that is actually written to registers.  2. Next thing I notice is that when I load my FSM configuration and GUI files and click "Write FSM configuration to the sensor". Head to Sensor Evaluation and return back to Advanced features -> FSM. The FSM ODR now changes to 12.5 Hz.This is how FSM tab looks when I load gui and config fi

Hi Does anyone know how to stabilize the gyroscope and accelerometer signals. I am getting signals back but I am trying to move a radio button on a bullseye and can't seem to smooth out the signal. I am using I2C communications.  

Red light flashing. App showing 0% charged after 15 minutes

I am using STEVAL-MKI109D + STEVAL-MKI238A. I have evaluated motion-stationary FSM example as it seemed closest to what we want to use for our application. It seems to work fine, however it is too sensitive and needs some upgrades.What I want to achieve:Setup timer (TI3) to some value such such as 5 seconds. During this 5 second period, I want to detect specific number of events above certain threshold (GNTH1). If specific number of events were detected during 5 second period, generate an interrupt and repeat over and over again. If specific number of events were not detected during that 5 seconds period, just reset the counter and repeat.My cofiguration:It sounds like a simple requirement but I cannot achieve it using FSM.I tried to achieve this using 2 FSM's: FSM1:FSM1 is responsible for incrementing long counter everytime the GNTH1 is reached. FSM2:FSM2 is responsible for resetting long counter. I don't really understand why the MEMS Studio forces me to put STOP command at

Hey. I have recently received STEVAL-MKI109D + STEVAL-MKI238A for evaluating LIS2DUX12 accelerometer.I have opened MEMS Studio, chose my evaluation board and performed FW upgrade as prompted by the MEMS Studio.  I have then proceeded to Sensor Evaluation -> Save to File to capture my own data for further processing. Each sample was taken using 5 seconds timeout. So I just click "Start" and proceed with moving the board for 5 seconds. I did the following:1. Capture 3 "flip_down" samples of me flipping down the evaluation board.2. Capture 4 "flip_up" samples of me flipping up the evaluation board.3. Capture 4 "shaking" samples of me shaking the evaluation board.4. Capture 3 "stationary" samples where the device was just sitting on the table. After collecting all samples in .csv format, I have then proceeded to Advanced Features -> MLC and uploaded all collected .CSV data using different class names. See the below:  I noticed that STATIONARY and SHAKING samp

Hi ST Community,I am working on a project using the SensorTile.box Pro. My goal is to implement a highly accurate step counter using the LSM6DSV16X's embedded pedometer.What I have done:I recorded data patterns at 30Hz and successfully ran the Pedometer Regression Tool in MEMS Studio.The tool generated the optimum configuration files (pedometer.json ).I converted these register settings into a .ucf file format.The Problem: I need to apply these "Golden Settings" to the sensor initialization in AlgoBuilder so they persist after a reset. However, I am unable to find a standard method to load this configuration:I checked the Sensor Hub block properties, but I do not see a "Load Configuration/UCF" option.I searched the Library for a "Register Write" block to manually input the values, but this block seems missing or hidden in my version of AlgoBuilder (I only see Acceleration, FSM/MLC, Sensor Hub, etc. under the Sensor Hub folder).My Question: What is the correct way to inject a custom reg

Hello, I'm using (ISM330DHCXTR) accelerometer to calculate the phase difference between two axes to measure the movement of a system. configured ODR at 6.6 KHz and measured the operation frequency of the system which has a 10% error while measuring the FFT and adjusted the ODR on the math lab logic to match the operation frequency of the system but still the phase difference has a major deviation, can someone confirm what is the ODR deviation on this sensor and how to correct the same on the firmware instead of modifying on the paired application.  

Post edited by a ST moderator. Please use English in this community. Please read How to write your question to maximize your chances to find a solution   手册上写着在高分辨率模式下功耗 90 µA，在低功耗模式下功耗低于 1 µA。可是我用示波器串联电阻抓出来的功耗接近1MA，并且未使用MCU配置传感器时功耗就已经接近这个值了。传感器通过开发板的3.3V接口进行供电。电路图如下所示，哪里存在问题呢？ Translation: The manual states that the power consumption is 90 µA in high-resolution mode and less than 1 µA in low-power mode. However, the power consumption I measured with an oscilloscope using a series resistor is close to 1 mA, and this value is already close to the power consumption even without configuring the sensor using the MCU. The sensor is powered through the development board's 3.3V interface. The circuit diagram is shown below. Where is the problem?

Hi     I am looking for example code for the LIS2DW12 using Arduino code . I am using an Expressiff module esp32 C3  Does anyone have some example code ?

Hi Team, Greetings! Mems studio is used and LSM6DSV320X is kept on the sensor tile box pro, We are currently performing drop tests using the SensorTile Box pro platform mounted on a flat board casing. The tests are conducted from the same height under two configurations: Wired mode with an ODR of ~7.6 kHzWireless mode with an ODR limited to ~1 kHzWhile analyzing the accelerometer (high-g) data, we observe a variation in peak acceleration values of approximately ~20 g between different runs, even though the drop conditions are kept identical.We would like to understand the following:Is such a variation (~20 g) in peak acceleration expected under these conditions?Could the difference in ODR (7.6 kHz vs 1 kHz) significantly impact the captured peak values for short-duration impact events?Are there any known limitations in wireless mode (e.g., filtering, bandwidth constraints, or data handling) that could lead to underestimation of peak g values? and Free Fall interrupt

We want to use the Sensor TileBox pro to measure temp pressure and acceleration in structures.   We have been using some of your boards the MKI versions and they will run at a maximum of 1400 time steps per second when configured for about 2000.   I have the tilebox pro exporting on the USB and picking it up with a new C# program.   See below.  It is reading at 18 cycles per second, I need to adjust the freq output, I thought I had a higher rate.  it is really easy to use, but I have the Android Program setting 75 from pressure and temp and 480 for acceleration and getting 18 time steps per second.  Is this your board's limitation on exporting via the USB cable.   Where am I supposed to post this?