MEMS (sensors)

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 Yes, 'length' is mis-spelled.The operation has timed out.Has anyone had a similar experience?Is there a newer version of the 'STPM3x Evaluation Software' ?Rob ParsonsSchneider ElectricKnightdale NC US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

Hello STM Community,I am working with the STHS34PF80 presence detection sensor on an STM32WB55 development board, and I've encountered an unexpected issue with its detection behavior.Problem Description:When an object like plastic or paper passes in front of the sensor, it does not detect the object's presence, which I understand could be due to these materials not emitting enough infrared radiation. However, the problem occurs after the object is removed. Once the object is no longer in front of the sensor and there is no one around, the sensor unexpectedly detects a "presence."Observations:The sensor detects human presence accurately.The false presence detection only happens after an object (plastic, paper, etc.) is moved away.There are no obvious environmental changes (such as temperature shifts or airflow) when the false presence is dete

Hi.I'm an intern working with the SensorTile.Box Pro for a project. As the subject suggests, I was wondering if the mobile app provided with the box could be modified, and if so, how?May sound like a dumb question, but I saw that the source code for the app on Github required an SSO authentication somewhere in the gradle files. I have little experience with such things and would appreciate if someone who knew more about this could help.The purpose of the modification was to change the GUI of the app among other things, such as triggering an SMS message when a specific event occurred.

I'm using the LIS2DW12 accelerometer to detect and classify different types of vibrations. I need to configure a wake-up threshold for a specific scenario.Two questions:1. When the sensor is set to 2g and I use the WK_THS[5:0] configuration, setting the register to 000001 corresponds to 2g/64 = 0.0312g. However, I'm trying to determine what this value represents in the recorded signal, which appears to range from 2048 to -2048. Does WK_THS[5:0] = 1 correspond to 0.0312/2 * 2024 = 31?2. Additionally, since the sensor may be mounted with a tilt, I’m considering applying a High Pass filter. Is this the correct approach to

Hello Community,I am trying to implement a basic FFT computation on our STM32G0 MCUs using MotionSP for a 16-bit accelerometer signal.I am not sure why does MotionSP by default uses float32 for FFT when the original sensor signal is 16-bit?Can I then simply reconfigure the data type in the MotionSP by changing the float32 to q15?Kindly guide, as we do not have FPU to compute float32.Also, does a 16-bit sensor output requires a float32 FFT?@Eleon BORLINI 

Hello,I'm trying to disable temperature compensation on the lps22hh sensor, does anyone know if there's a specific register i can manipulate? Thanks!

Hi Sir, Can the LPS27HHW be used to detect non-water liquids, such as oil?  

Good afternoon!  I used an example from the link https://www.st.com/en/embedded-software/fp-ai-predmnt2.html   However, the card does not connect to the cloud, I have already downloaded the certificate and private key and it gives an error.           

Hello all,I am looking for more info on the gel used with ILPS28QSW.We want to use it in an application where the sensor may be submerged in 10% to 40% alcohol v/v for extended periods of time. Will the sensor be okay? Or is there another product which is more suitable for this application?Thank you,Regards,ShrinathN

Regarding the sensitivity of IIS3DHHC, the datasheet says 0.076mg/digit. It is written. To be exact 5g/2^16 (= 0.07629mg/digit) Is that correct?Thanks!

I am using the STHS34PF80 sensor with the TMOS10-12030 lens from Fresnel Factory. Does anyone have the transmittance % for wavelengths 5um-20um?Thanks

Hello there, I am currently working on a project where I am prototyping STM32WL55 with an STHS34PF80 sensor to detect the presence. The presence detection is excellent and robust so far. However, the power consumption seems to be very high at the moment. I am using Nordic Power Profiler Kit II to measure the power consumption of the STHS34PF80 sensor and it's around 350 microAmps. I am using Power Profiler as source mode sending 3.3v and measuring current consumption on the sensor. The TMOS Sensitivity is set at 2, AverageTAmbientNumber is at T_1, Block update is false, and TmosODR is running at 4Hz. I am using the Arduino framework to run the overall system and the sensor is purchased from Sparkfun (https://www.sparkfun.com/products/22494).   The power consumption is very high considering the sensor runs 24/7 and inte

I'm working on the IIS2DH and I came to plot the system response at various frequencies depending on the high-pass settings (12, 50 or 100 Hz) with ODR = 5372 Hz, FS = +-4G, input signal 2.82g sin wave (2g RMS). Surprisingly it seems that in the passband not all filters have the expected 0 dB gain, the higher the cutoff frequency the lower the inband gain, as seen below:Is something that is expected for this sensor + digital filtering? What type of digital filter is implemented? I found no traces on this in the datasheet.All informations much appreciated.Thanks in advance

Hello ST Community,I'm currently working with the STHS34PF80 sensor for presence detection on an STM32WB55 development board. However, I've encountered a couple of issues that I hope someone here can help with:Short Detection Range: The detection range without any lens is quite limited, averaging around 1 meter. This is significantly shorter than what I expected for my application. I’m wondering if others have experienced similar range limitations and if there are any suggestions or adjustments that can improve this.Stuck Presence Flag in Register: After a presence is detected, the presence register value maintains a fixed high value even after the object has left the sensor’s detection zone. This causes the presence flag in the function status register to remain raised and not get cleared automatically. As a result, I am unable to reliably use the presence detection for further processing because the presence f

Hello ST guys:We have used LSM6DSV FSM function and LSM6DSV supports 4 external sensors. We have seen that SINMUX command is used to change the input source for FSM as follows:But which one of four external sensors will be chosen to use for FSM? How to implement this function for FSM and could you give us any good suggestions? Thank you very much.BRs.

I am not able to pair Sensor Tile.Box Pro with my iphone 13 over Bluetooth with the app ST BLE Sensor. When connecting I get prompted to enter number shown on the device, but the Tile.Box does not have a display, so that’s impossible. 

Hello,     I am developing on a custom boards with a STM32F407, LSM6dsv16x and LIS2MDL.On CubeMX I set the MotionFX package. Even selecting the MotionAC it looks like the library is not added to the output (is it correct?). The motionTL can be added. If I would increase the inclinometer by performing a factory 6-points calibration of the accelerometer, is the MotionTL the solution?On a previous board we used LSM303ARG we measured the 6 points, performed the Matrix calculation off-line.  Does the library compute the transform Matrix? Thank you.

Hello,I'm working on a BLE server using the STEVAL-STWINKT1 board and the STSW-STWINKT01 package , and I'm encountering issues with the GATT characteristic write operations, particularly for controlling an LED.Setup:Board: STEVAL-STWINKT1BLE stack: Using the ST BlueNRG BLE librariesGATT DB: The GATT database includes a characteristic to control an LED (LedCharHandle).Functionality: I'm trying to control the LED on the server side using write requests from a BLE client.Problem:The BLE client sends a write request to the server (STEVAL-STWINKT1) to toggle the LED. However, the write request either isn't received or isn't processed correctly by the server.I've verified that the Write_Request_CB function is implemented and checks the correct handle (LedCharHandle + 1). It attempts to read the data to control the LED, but the LED control functionality isn't triggered as expected.Key Code Sections:Here i

Hi,    I am using ASM330LHB in my project. ASM330LHB has only built self test which can only executed during power on to see ASM330LHB is healthy or faulty? But during runtime (device working in dynamic conditions) there is no way to find ASM330LHB is healthy or faulty?1. Please suggest a method to find ASM330LHB is healthy or faulty during runtime?2. Is ASM330LHB is fully calibrated against over its temperature range?Thanks in advance,Pavani.  

When STHS34PF80 detects the human body for a period of time, TPRESENCE cannot fall back normally, and pres_flag is always 1。 code：

I'm using LSM6DSV, and use it wake-up funciton, I will configure registers when wakeup, that time I got some invalid data such as "1.998665088 1.998665088 1.998665088", how to avoid it?