MEMS and sensors

I am trying to interface LSM6DSOWTR with stm32 using I2c interface. This is the schematic i have made for this module While connecting SD0/SA0 is connected to GND, I have tried to run the I2C scanner and found that it its address is 0x6A but in the main code i am unable to get the accelerometer and gyroscope value from its address.In the attachment, i have  attached main.c, and the library created for it.

I wanted to try the STEVAL-IDP005V1 from STEVAL-BFA001V1B,I followed the description given in UM2438and nothing worked,Finally I realized that the cable description is wrong (or may be I've got a bad cable),the ground is on white, not on blue wire

Hi, I came across this post:https://community.st.com/t5/mems-sensors/steval-bfa001v1b-wrong-cable-description/m-p/782314#M25282which says that the documentation for the device is wrong and wiring colors for 18V and GND are not correct as per the documentation.I am really confused with what the actual wiring is, kindly help

HiI am trying to use this on a raspberry pi4 running ubuntu 2404. I am able to run make successfully but on trying to run the generated binary I get./spdkit error while loading shared libraries: /lib/aarch64-linux-gnu/libc.so: invalid ELFI don't know what to do to fix it. I did not install the linaro toolchain as I was not cross compiling - is that likely to be causing this error ?

I'm extracting the histogram data from the VL53L8CH. In the 8x8 mode, we are limited to few bins (~18) per reading. Is there a way to configure the sensor to oscillate the starting bin configuration so that I can get better range with the same bin precision? For example, in a cycle read bins 0-17, then bin 18-35, etc. If this is possible, is there guidance for how this can be done? Following the code from Example_12_cnh_data.c, is it possible to setup multiple configurations within a loop, such as vl53lmz_cnh_init_config(&cnh_config, 0, 18, 1), vl53lmz_cnh_init_config(&cnh_config, 18, 18, 1), etc?

I am trying to run multiple VL53L5CX-TOF-sensors with a single Pi Pico to be able to stitch together multiple of the sensor images.However for this to work I have to change the i2c addresses of the sensors.I am trying to use the set_i2c_address function for this.I have read the steps from the usage guide about enabling/disabling additional sensors on the same i2c bus via the LPn pin but whenever I try to call the set_i2c_address even with just a single sensor connected I get  RuntimeError: VL53L5CX: set_i2c_address error.Currently I am using the Pimoroni Firmware that provides a driver accessible via micropython that just calls the ULD firmware / driver for the VL53L5CX. I am not sure if something about my approach/order is wrong or if there might be an issue with the ULD driver itself.I would greatly appreciate any help/advise. This is the code I am currently using:   import pimoroni_i2c import breakout_vl53l5cx import time from time import sleep import machin

It seems that its CS is inactive, the LIS will assume that it should be in I2C mode.But if I have multiple devices on the SPI bus, then I want to be able to disable I2C mode altogether.Our board has exactly this setup and it seems that whenever I enable the LIS2DH, it corrupts SPI comms for the other device, presumably due to it entering I2C mode as soon as I de-assert the LIS CS-pin.I'm unable to find a register that controls this. So my question is: How do I use the LIS2DH on a SPI bus with other devices?

..

Hello,This is in regard to the question I posted at the webinar on AI-powered gesture recognition with Time-of-Flight sensors held on 3/11.  Can the orientation of the VL53L8CX ToF sensor be detected in case it is moved and possibly gets inverted after training is done?  I'm interested in correctly detecting gestures like LIKE/DISLIKE and SWIPE RIGHT/LEFT even if the sensor has been turned upside down after the overall device is trained.  The solution should work correctly for left- and right-handed persons.  It's ok to add MEMS sensors to the overall project but I prefer trying to solve problems with software first rather than just throw hardware at them, as long as the extra software doesn't bog down the MCU.Thanks in advance and best regards,Bruce

Hello,I'm looking for any available douments/application notes on how to mount the sensor on a device housing. For example I would like to know what is the suggest o-ring, is it safe to expose the sensor opening to the external world or it needs some protection? What will happen if sand/dust or salt gets in the sensor opening?   

Hi,I am using an LIS2DE12 in I2c mode.  During setup, my code:- wrote 0 to CTRL_REG4 (BDU=0, FS=00, ST=00, and SIM=0)- wrote 0 to CTRL_REG2 (no high-pass filtering)- wrote 0 to CTRL_REG5 (disable FIFO)- wrote 0 to FIFO_CTRL_REG (selects Bypass mode)- wrote 0b00111111 to CTRL_REG1 (sets ODR to 25Hz (40ms), LPen=1, X=1, Y=1, Z=1 which enables all 3 axes).Then, approximately once every 100ms, my code does the following:- It reads STATUS_REG and confirms that the 3 least significant bits are all 1.- With one I2c transaction, it reads 5 bytes starting with register 0x29 (with the 0x80 bit set). This gives me the value from OUT_X_H in the first byte, OUT_Y_H in the third byte, and the value from OUT_Z_H in the fifth byte.Will the values I get from OUT_X_H, OUT_Y_H, and OUT_Z_H always be coherent, i.e. from the same measurement?OR is it possible that the chip could update some of these registers with a new measurement at the same time that my I2c transaction is reading them, such that on

Hi! I've been testing the VL53L4CX sensor for the past few months and have finally decided to take a look at its additional histogram data. My most recent test is a measurement of an empty black bucket with a white sheet inside (to increase reflectivity). While the distance measured is accurate, the histogram data, which I expected to be somewhat static, seems to oscillate between two histogram shapes.The data below is distance, minimum distance and max distance measured.244,244,246, 2025-03-10 11:48:04.530766241,241,330, 2025-03-10 11:48:04.727428243,243,245, 2025-03-10 11:48:04.926467241,241,330, 2025-03-10 11:48:05.124474243,243,245, 2025-03-10 11:48:05.322733241,241,330, 2025-03-10 11:48:05.519547243,243,331, 2025-03-10 11:48:05.711350Below are the histograms (AdditionalData.VL53LX_p_006.bin_data) for each measurement.847,860,895,867,757,815,139036,190843,89753,1021,794,804,848,803,827,828,790,853,892,731,833,759,843,803, 2025-03-10 11:48:04.530766704,729,118073,161246,72683,950,69

We have a ILPS22QS pressure sensor.We are getting an occasional i2c error.On investigation it seems the ILPS22QS sensor is holding the SCL line high during a pressure reading.I have read through the datasheet and see no functionality that would allow this to happen. We have observed the pressure sensor holding the i2c scl line high.This is shown in the below oscilloscope capture.Yellow = sensor side of i2c SCL series resistor R31Blue  = micro side of i2c SCL series resistor R31 It was suggested it could be manufacturing defect of a bad ground connection, however I do not believe this to be the case as:During a capture where I saw the SCL line being held high the SDA line wasn't:Yellow = micro side of i2c SDA series resistor R34Blue  = micro side of i2c SCL series resistor R31Note the lows start at ~0mV and change to ~416mV about 2/3rd the way through the transactionDoes anyone have insight as to what may be happening?Most of the time the sensor will recover, I saw a

hi! Please provide the zero bias(accelerometer) at 25℃ of ASM330LHHTR, thanks!

If your VL53L8CX gets past the 'is_alive' function but you cannot get it to run, it might be because you are running on a big-endian machine, and the ST code you downloaded assumes a little-endian machine. Try swapping your vl53l8cx_is_alive function with this one. It reads 4 bytes by bytes, by words and by longwords.  You will get a warning about the implicit definition of printf, so add     #include <stdio.h>     if you are careful about getting warnings.       uint8_t vl53l8cx_is_alive( VL53L8CX_Configuration *p_dev, uint8_t *p_is_alive) { uint8_t status = VL53L8CX_STATUS_OK; uint8_t device_id, revision_id, byte2, byte3; uint16_t chip_id, word2; uint32_t long_id; status |= VL53L8CX_WrByte(&(p_dev->platform), 0x7fff, 0x00); status |= VL53L8CX_RdByte(&(p_dev->platform), 0, &device_id); status |= VL53L8CX_RdByte(&(p_dev->platform), 1, &revision_id); status |= VL53L8CX_RdByte(&(p_dev->plat

Hi Team,  We are working with the LSM6DSOX sensor and integrating it with two different MCUs: nRF5340 and ATSAMD51, using the I2C communication protocol. We have been able to successfully read the device ID, accelerometer data, and gyroscope data. Additionally, we've implemented our own logic for step detection and step counting. Recently, we learned about the Machine Learning Core (MLC) feature, which provides useful capabilities like detecting activity states (idle, walk, run). We obtained the .ucf file for MLC, used the UNICO tool to generate the corresponding .h file, and attempted to integrate it into our application. We followed the documentation and tried monitoring the MLC_STATUS (0x70) register to track activity states. Challenges faced: First Attempt with nRF5340 MCU: Initially, we tested the MLC functionality with the nRF5340 MCU using I2C communication. However, when we read the MLC_STATUS register, we consistently received 0x00, no matter the movement or activity. D

Hi,I have downloaded "GestureEVK_v1.5.0" and tried "gesture recognition" function.It can be launched by GUI and worked well.I also downloaded "STSW-IMG035_F401" and tried to run "gesture recognition".However, it keeps printing the messages as shown below.I have no idea how to let "STSW-IMG035_F401" start running "gesture recognition" and output results through UART after downloading to NUCLEO-F401RE?(No need to enter a start aommand.)Could you guide me in detail about how to modify the code of "STSW-IMG035_F401" to achieve this objective?Thank you. Hardware: NUCLEO-F401RESoftware: STSW-IMG035_F401Sensor: VL53L8IDE: STM32CubeIDE 1.16.0

Hi. I have question regarding VL53L8CX ToF sensor. The minimum distance is 2cm. The space between the objects being measured is less then that. Was wondering if it will be possible to reflect the light off from a mirror at 45 degrees to increase the distance between sensor and object being scanned? Thanks for the assistance Jonathan

Hi everyone,I am currently trying to get a lsm6dsox to interface with a Nordic nRF52833 board using i2c communication. I am looking to read accelerometer/gyro values.I am able to write to the sensor but I am unable to read from the sensor without receiving a NMAK. I am using the STEVAL-MKI217V1 adapter board to connect to my nRF52833.I have connected the VDD/VDDIO pins to VCC, my SCL/SDA pins to the pins I configured for i2c communication, I have connected CS to VDD, GND pins to GND, and SDO to ground. This is my result from the Logic analyzer This is my source code:Main.c:/* * Copyright (c) 2020 Yestin Sun * * SPDX-License-Identifier: Apache-2.0 */#include <stdio.h>#include <zephyr/kernel.h>#include <zephyr/device.h>#include <zephyr/drivers/sensor.h>static inline float out_ev(struct sensor_value *val){    return (val->val1 + (float)val->val2 / 1000000);}static void fetch_and_display(const struct device *dev){&n

helloI need to interface about 20 small package inertial sensor via SPI and my MCU doesn't have enough GPIO for the chip selects so I'm looking for a module that can be daisy chained via SPI however I didn't find anything in the datasheets that indicate if these devices are compatible or how to do it.can anyone tell me if the LSM6DSOX is compatible or if not if there is a module with about the same capabilities that is compatible??best regards

We're using the LSM6DSV16X iNemo sensor and we're quite confused with the SensorHub feature (described in AN5763).Does this feature only store the external sensor data in the FIFO so that the main mcu doesn't have to read the other sensors directly? If the external sensor is a magnetometer, does the LSM6DSV16X use the data in the SFLP algorithm? Or do we need an ISPU sensor to be able to use the external sensor data gathered by sensor hub?

I have a question about the MEMS audio sensor MP23DB01HP. I think i already undertood that the output is a PDM, but my question is, how can I convert that to obtain a corresponding value in dB? Or some used unit? I have done the acquisitons, but know i don't know what to do with that values... Thank you in advance for your replies

Dear ST Team,I am having difficulty finding the ULD library for the VL53L3CX chip. The complete library is too large for my chip's Flash memory, and the ULP library's ranging capabilities and accuracy do not meet my requirements. Could you tell me if there is a ULD library available for this chip, similar to the one provided for VL53L1? Thank you for your assistance.

Hello, We would like to integrate LSM6DS3TR sensor.For that to happed we need SEE (Secure Execution Environment) framework drivers for Qualcomm based processors. Could you please supply drivers for that? It is urgent. Thank you.Best regards,Miha

I tried to obtain roll pitch and yaw with the help of motionfx in the x-cube mems1 package by reading data with spi using ASM330LHH, LIS3MDL and LIS2DH12 sensors. I cannot try my code because I do not have the sensors available at the moment. Can you review the code, is there a faulty or missing part? I would appreciate if you can help me. I present the CS pin settings and the project in the attachment      /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * *****************************************