MEMS (sensors)

Hello community,I have an application where I want to implement STHS34PF80 for detecting people PRESENCE and MOTION with a range of 3 to 4 meters. In the Datasheet it is stated that it is possible without using extra lenses. Although, I am struggling to find the best config to have a good recognition with more than 1,5m.- What would be the step-by-step to make the sensor run in 4 meters range?- Could someone give me an example config for THRESHOLD, HYSTERESIS, LPF, ODR and AVG?

FIFO_CTRL4 is 00A1 in hex , 10100001 in binary FIFO_CTRL3 is 00AA in hex , 10101010 in binary fifo_status1 is 00000000 fifo_status2 is 00100010 FIFO DATA OUT TAG IS 00100001   I have already set LSM6DSO like this but no data is inside the FIFO Must I open and close embedded function?  I saw someone 's reply in the community  riteRegister ( LSM6DSOX_FUNC_CFG_ACCESS, 0x80 ); //Open Embedded Functions WriteRegisterBit( LSM6DSOX_EMB_FUNC_EN_A, 3, true ); //Enable Pedometer sensor in Adv Func WriteRegister ( LSM6DSOX_EMB_FUNC_EN_B, 0x10); //Enable false positive rejection WriteRegisterBit( LSM6DSOX_EMB_FUNC_FIFO_CFG, 6, true ); //Enable Step Counter Batching WriteRegister ( LSM6DSOX_FUNC_CFG_ACCESS, 0x00); //Close Embedded Functions  

Hello,I am using MotionFX on STM32BlueCoin device. I tested values of linear_acceleration and gravity from MotionFX library, and I have very strange bias on produced values, although I try to feed perfect hardcoded data to the library.For example I always send MotionFX 6X input data as following, Accelerometer x=0, y=0,z=-9.81, Gyro x=y=z=0In return, I have strange values on the gravity axis. INFO:__main__:Gravity -> x: 0.0000, y: 0.0000, z: -10.0000 INFO:__main__:Linear Acc -> x: 0.0000, y: 0.0000, z: -0.1890 INFO:__main__:Gravity -> x: 0.0000, y: 0.0000, z: -10.0000 INFO:__main__:Linear Acc -> x: 0.0000, y: 0.0000, z: -0.1890 INFO:__main__:Gravity -> x: 0.0000, y: 0.0000, z: -10.0000 INFO:__main__:Linear Acc -> x: 0.0000, y: 0.0000, z: -0.1890  Why is gravity Z always 10? Shouldn't it be 9.81 in perfect condition? Why linear_acceleration have this strange value of -0.189?I tried to change many knobs parameters, but I couldn't even change it a bit.

Hi,I am developing a product that can be installed in either a horizontal or vertical orientation and uses the LIS3MDL as the source for a compass..The PCB is common so the LIS3MDL will be in one of 2 orientations.In a horizontal position everything is fine and I get the readings expected.In vertical orientation it is not working.My assumption was that the axes X,Y,Z were just names and that the data from each axis was relevant to that axis and that the data obtained would relate to the plane that axis was on.It seems this is incorrect. I have run a test and see that the range of values (max-min) on each axis is very different, particularly on the Z axis.Moving the sensor through 360 degrees on each axis I am getting X -59 to 25, Y -36 to 46, Z -86 to 0I assumed I would get the same min to max for each axis.So can the sensor be used in a vertical orientation? I need the Z axis facing forward (to replace X) and X axis facing left (to replace Y).

Hi,  I want to detect a shock  with the H3LIS331DL and its interrupt on threshold level. I used it in normal mode and an ODR of 1000Hz. The shock in my testbanch is : I want to know what is the minimum of time when the duration is setup to 0 with my ODR to set interrupt signal.What is the answer of the sensor when the shock is an high frequency one...There is few information about the bandwidth of the sensor or about its transfer function in its datasheet or application note.Thanks for your help   

Hello, I'm using the LIS2DW12 on my own board.Consumption seems a little high to me. In the datasheet I found a value around 5.5µA and I obtained rather 45µA.The configuration is as follows:- ODR 50Hz- FIFO in continious mode with INT1 enabled- Full-scale 4g- 14 bits resolution in LP2.I did not find any information regarding consumption in FIFO mode. Can you give me some information?Thanks

Hello,I am using STEVAL-STWINKT1B development board and I can write and read sd card using setting to SD 4 bits Wide Bus and FATFS.If I add on STM32CUBEMX as middleware FREERTOS I can't read the SD in fact I get back FR_NOT_READY when I execute the f_open method.How can I solve this problem?

Hi, I'm trying to decipher the inner workings of the fsm configuration on this sensor. While the an5904 application note features an example of configuration on page 42, things take a turn after the 21st step. The following step selects page 2, and I can't find a description of the page contents anywhere. The only available description of the embedded advanced features pages is for page 0 in the data sheet. 

Hello,  How many mechanical shock support the LSM303AH please ? and if uou have others reference of inclinometers thanks to give me informations. Thank you

Dear, Could you tell me if FS signal have internally pull up or pull down?   Regards

Hi Everyone,I'm using STM32L4 with LSM6DSM on IAR IDE and using motion AC library to calibrate the accelerometer data. Code flow is like in first position when it has got the 500 samples for one position then it will wait till you rotate the position and when it is in next position again it will take sample for that position. The problem is, If I kept the device for longer time in one position only then lets say 2 min then sensors doesn't get calibrate, not able to understand what can be the reason.Because I'm not able to find out is there any timeout or any buffer overflow is happening. 

Does anybody know where do I get the .a library for LSM303AGR on ambiq apollo4blue plus platform which contains following feature.Acc Data + Mag Data -> AzimuthMag Data Calibrationnote:I am currently using this two library, but it doesnt work well and I have been tring to find the referrence about this two lib but I can not find any as well. 

We have a STEVAL-MKI224V1 kit, which should be equipped with a LPS22DF. I have tried to use the static (I2C) address of the sensor, and after much time, I discovered it is (depending on the state of SDO) 0x5C/0x5D, and not 0x6B/0x6A, as stated in the datasheet.Strangely (or not) 0x5C/0x5D is the static address of the LPS22HH, but according to the GETPID command, I do have a LPS22DF.Thank you.

Hello,We have implemented the LIS3DH with a nRF52832 in I2C mode on our board, and are using the accelerometer to detect motion and vibration events. The LIS3DH internal high-pass filter and threshold detection are used to generate the INT1 interrupt.Our issue is as follows. We are observing an excess current draw of ~40uA in this state. Our evaluation has found the excess current to be associated with setting the INT1_CFG register value for interrupt generation. Attached are two charts showing 10 minute periods of idle current measurements of the whole PCBA, one with firmware built to set INT1_CFG=0x2A, the other with firmware built to set INT1_CFG=0x00, and otherwise the exact same code. The spikes in current can be ignored, those are BLE advertisement bursts. In neither case was the interrupt actually triggered.LIS3DH registers are set as below, other than the changes noted above. Register writes occur in the order indicated. I have also attached a screenshot of the circuit.CTRL0 =

Hi there!I'm having issues with my LSM6DS3TR device FIFO. I am trying to read and process all values stored in the FIFO by the accelerometer every interval using I2C. I am doing this by:1) Retrieving number of unread messages in FIFO at addresses 3Ah and 3Bh.2) For every unread message:2.1) Reading the pattern in address 3Ch and 3Dh.2.2) Reading the value of the FIFO in addresses 3Eh and 3Fh.2.3) Processing and storing value retrieved from value as x, y or z axis. I assume the pattern will tell me which axis the FIFO value relates to? I am only using the accelerometer, so I assume pattern = 0 is x axis, 1 is y axis and 2 is z axis? However, the pattern seems to be corrupted when I leave the program running long enough and will no longer align with the axis; for example- sometimes it will show pattern 0 but the value will be for y or z axis, pattern 1 but the value is for the x or z... etc...Further details about the settings of the LSM6DS3TR device:- I am using only the Accelerome

STHS34PF80 code needed to access SEL_ABS bit in ALGO_CONFIG embedded register Address: 28H using Arduino NanoI would like to know how to generate the code to set SEL_ABS bit in ALGO_CONFIG embedded register using Arduino Nano Board as the micro-controller.

Hello everyone,My goal is to record audio from one MP34DT05-A microphone via SAI PROTOCOL in an STM32F446 Nucleo Board. In resume, I receive data from microphone via DMA, then I make the transformation via PDM2PCM Library and write the buffer into an SD CARD via SDIO.I'm using STM32Cube IDE and I can see that the two buffers (input SAI data and output PDM2PCM data) are always being updated with values. Also, I confirmed that all the values are written into the SD with no missing values.I tried to replicate the code from "Microphone_Streaming" Stm32 examples (also made in this video: https://www.youtube.com/watch?v=BjTj1XXpjBU. But the result is always looking like this graph below. It seems like the microphone never respond to any higher sound... My feeling is that the parameters are not correctly adjusted and I'm missing something. Unfortunately, I think all the documentation available is very weak and I'm not reaching all the knowledge and attention necessary to be sure abo

Hello all.I would like to ask how to calculate dB from a data recorded by a MEMS microphone.I currently use the MP34DT04 on the SensorTile Kit. I checked the SensorTile can record sound with the microphone, and store a wav data file in MicroSD.In the .wav file, there are chunk of data and, of course, there are sound level data. Then, I would like to calculate dB data from the sound level data. How can I calculate?If the sound level data is 16 bit, the data would be in between -32768 and 32768. Is the digit can be mapped to full scale sensitivity? The sensitivitiy means the parameter in the datasheet. In the case of the MP34DT04, the sensitivity is in the range of -26dB to 120 dB.I also wonder what the description in the page 6 of the datasheet means. It says "Duty cycle: min = 40% max = 60%". Is it related to the dB calculation?Please take care yourself first, and looking forward to the answers. Thanks in advance. Masaru

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.

Hello,I'm designing a custom board with a LIS2DW12 accelerometer for motion detection. I want to use INT1 to send a signal to the MCU when it detects movement, which should wake up the whole system. The accel supports both i2c & SPI communication but I intend to use SPI. I would like to verify how I plan to make my connection between the accelerometer and MCU. Please refer to the images below.Note: VBAT is sourced from a 3V CR 2032 coin cellQ1) I'm aware that the datasheet mentions that to enable SPI communication, the CS pin must be set to logic '0' as seen in the image below. Is it okay if I directly connect the CS of the accel to a GPIO pin on the MCU through ACCEL_CS or should I add a pulldown resistor on the ACEEL_CS connection? Q2) The datasheet mentions using 100 nF (C6) ceramic and 10 µF (C5) aluminum decoupling capacitors for pin 9 (VDD). Is it okay if I use a 10 µF ceramic capacitor instead. I'm constrained for both real estate and budget on this project?Q3) Are

1- Is there a permanent memory in LSM6DSOX for machine learning? In other words, does the ".ucf" file that we load in case of power off or reset become permanent?2- Can we load the ".ucf" file without using "STEVAL-MKI109V3"?3- Can we load the ".ucf" file using I2C communication? Thank You.    

Hi,I am working on a custom ISPU code for LSM6DSO16IS and I want to generate interrupts on INT1 and INT2. I checked all the examples in x-cube-ispu/Ispu/ism330is_lsm6dso16is at main · STMicroelectronics/x-cube-ispu generates an interrupt only on INT1.Is it possible to generate interrupts on INT1 and INT2 at the same time? Thanks a lot :)Chen

私はB-L475E-IOT01A2(開発ボード)が手元にあります。B-L475E-IOT01A2に含まれている以下のセンサーを使ってデータを取得をしたいと思っています。相対湿度と温度の静電容量式デジタルセンサー (HTS221)高性能3軸磁力計（LIS3MDL）3D加速度計と3Dジャイロスコープ（LSM6DSL） これらのセンサーからデータを取得するサンプルプログラムが欲しいです。最終的にはここで取得したデータをNANOEDGE AI STUDIOで使用する予定です。Translated by ST community team I have the B-L475E-IOT01A2 (development board). I would like to acquire data using the following sensors included in the B-L475E-IOT01A2: Relative humidity and temperature capacitive digital sensor (HTS221) High-performance 3-axis magnetometer (LIS3MDL) 3D accelerometer and 3D gyroscope (LSM6DSL) I would like a sample program to acquire data from these sensors. I plan to eventually use the data acquired here in NANOEDGE AI STUDIO.

I am looking at the LSM6DSV16X MLC examples in the MLC Git Repo.I am confused by some of the register settings. For example, in lsm6dsv16x_six_d_position.h  const ucf_line_t lsm6dsv16x_six_d_position[] = { {.address = 0x10, .data = 0x00,}, {.address = 0x11, .data = 0x00,}, {.address = 0x01, .data = 0x80,}, // many lines deleted {.address = 0x02, .data = 0x31,}, {.address = 0x08, .data = 0x8E,}, // PAGE_ADDRESS: Address 0x8E not in the data sheet  I cannot find the address (0x8E) in the data sheet. I'm obviously missing something in my understanding.Any insights, guidance would be appreciated

Hello everyone, I have an ASM330LHH mounted on my selfmade board with stm32f405. The ASM330LHH works well except for the data sent by the gyroscope over the Z axis. This data is not stable at all. It wobbels very badly, quickly and with long intervals. The data around the X and Y axes is fine. How can I make the angle measurement around the Z axis stable?Hint: i use this library for configuring and getting the data out of the sensor: https://github.com/STMicroelectronics/asm330lhh-pidThank you very muchZain