MEMS (sensors)

Hello, I have been trying to make a accelerator project by using lis302dl accelorator on STM32f407 vg discovery card. There are three axis which are x, y and z. These have x, y and z variables according to position of lis302dl on the card. I have used SPI1 and E3 pin for CS. When ı observe the values on STM Studio, x and z variables changed everytime which is good. However y variables is always zero, I enabled x, y, z on lis302 dl register though. Can somebody give me idea about what I am doing wrong?       #include "stm32f4xx.h" #include "stm32f4_discovery.h" GPIO_InitTypeDef GPIO_InitStruct; SPI_InitTypeDef SPI_InitStruct; uint8_t x,y,z; uint8_t x_address = 0x29, y_address = 0x2B, z_address = 0x2D, m_data = 0x00; void GPIO_Config() { RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE); GPIO_InitStruct.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15

Hi,I am using LSM6DSO32X using SPI communication in TI AM2634 Chip.By default, I made a packet of Ctrl1_xl and Ctrl2_xl to 0x10b0 0x1110, and the Accel data and GYRO data were output.I saw Datasheet, but it's too hard to understand what each register is playing.Can you tell me the appropriate Register setting example?Can you tell me how to use LPF?The figure shows the data output to my register settings.From the top left, Accel X, Y, Z, Gyro P, R, Y. Also, how do you correct each Accel value and GYRO value?Do I have to implement it in my own software? Thank you

helloI'm currently using the LPS22DF pressure transducer, which can withstand up to 22,000 g, but since in the work environment there's dust and water, I'm going to switch to either the LPS28DFW or LPS33K since they're waterproof, but in their datasheet there's no indication of shock resistance?my second question is how can i protect the sensor against dust?

Can i reduce the sensitivity ("sensitivity": 1) for a microphone (IMP23ABSU) for it not to reach the 130dbSPL? What does the "samplesPerTs": 1000" translate to? Is the sampling frequency defined with "ODR": 192000" or "ODRMeasured": 192000" ? What is the connection and the difference between ODR and ODRMeasured?   That is the reason i want to achieve the reduction of sensitivity. Im measuring an air-leakage that has a diameter or 1 mm at a distance of 20 cm. The Amplitudes are normalized (x * 1V/32768). Any idea

Hi STMicroelectronics Community,I hope this message finds you well. I am currently working on a project that requires a microphone capable of capturing voice from a distance of approximately 4 to 6 meters. Any suggestions?Thank you

I am currently working with the LSM6DSOX IMU sensor from ST and I am unable to write to registers of the sensor.I am addressing the sensor via 4 Wire SPI.For example if I try to set the output data rate which is located in the register CTRL1_XL (0x10) setting the register to 0x40 and read back the register afterwards it is still at 0x00Here is the data sent as seen by my logic analyzer (Chip Select is not pictured in this screenshot but it is low for the entire 16bit transfer)First 8 bits is the address 0x10 (+write bit which is 0) and the next 8 is the data I want to write to it but if I read back this exact register after a short delay the

In my design, when setting the ODR = 100Hz or below ,  I can get 100hz INT signals , and received 100 sets vibration data every Second.  （Using XYZ data-ready as int1）and modify the ODR setting to 200Hz , just get 200 hz INT signals ，and received 145 sets data。How to improve the actual ODR ?  We want  realize 1.376KHz @hr mode or 5.376kHz @LP mode,  Which mcu is suitable ?  STM32F103  70MHz ?  or  higher End ?   And I2C interface is suitable for 5.376kHz ? or must be SPI ？ 

Greetings, I am trying to figure out the full chain scaling values for the gyro and accelerometer of the ISM330DHCX. I am reading the datasheet as well as the AN5398.  According to the datasheet the output values of accelerometer and gyro is scaled with the configured range over an int16 to milli-g and milli-dps. So to convert an acceleration reading for with the sensor configured to 2g we do:scale = 2 * 1000 / 2**15accel = raw * scale // accel now in milli-g for 2g scale is about 0.061. The same formula can be used to get the scale for the other ranges. For acceleration these values make sense in existing drivers (linked below). However, when doing the same calculation for the gyro range things do not make sense. E.g. for a range of 250 dps we should get:scale = 250 * 1000 / 2**15 = 7.629but this value is not the one that is listed in existing dri

Hello,I have question about gps speed prediction in the tunnel.When gps loses signal in the tunnel, we can not get any speed info from gps.In that case, can we predict speed using mems? If yes, how to solve that?Thanks in advance for your advice.Best regardsTiel

Hello,I'm using the IMP34DT05 available with the STEVAL-MIC003V1 kit to record audio the nucleo-f401re. I'm using the PDM2PCM library to convert the PDM stream to PCM data. The audio is recorded at 8kHz.I have tried reproducing 1kHz tone on the microphone. Unfortunately, after recording and listening to the .wav file on the computer it appears to be really noisy.Do you know how can I solve this issue?I have tried increasing the sampling frequency to 16kHz without success.I upload the recorded .wav, by looking at the FFT the 1kHz peak is present. However, if you listen to the audio, playing it in audacity it is really bad. The signal-to-noise ratio seems to be really poor.Any suggestion is welcome.Thanks.

Hello,I am using the SensorTile Dev Kit for collecting accelerometer and gyroscope data. I have managed to use the SDK in python for interfacing with the sensor and plotting acc and gyro data in real-time. However, I was wondering if there was a way for me to adjust the sampling frequency which currently seems to be at 20 Hz for me.

Hi,I'm doing gesture recognition with the LSM6DSO(X) finite state machine. It still doesn't work as it should.1.Can I use sqrt(x²+y²) as input data without using the z axis information? Similar to the norm sqrt(x²+y²+z²), but without z axis. I am not able to do this with a MASK.Background: I try to detect every back and forth movement in the xy plane, no matter in which direction. To do this, I set a limit value for the amplitude of the acceleration in the x and y directions. But if the movement is between the x and y axes, it is more difficult to reach one of the x or y limits. 2.My other question is whether it is possible to measure the distance traveled in FSM? Because I can also use the integrated gyroscope signal to measure the rotated angle with command SINMUX.Best regardsArmin

  Hello. I would like to make a new project for the "SensorTile.box PRO" board using STM32CubeIDE. It appears that the board is not available. (In the image below, you can see that I have filtered on "box" and only the non-pro SensorTile.box device shows up. These two boards are quite different (MCU, peripherals, etc.) so I can't use it. Is this a bug or omission in the tool? Do I need to add the SensorTile.box PRO BSP manually or something? Thanks  

Hello,I have a SensorTile.Box Pro that I can connect to using my Android Phone. However, when I run the example_ble_1.py script to discover ST devices and connect to them to read their features using ble, it detects my SensorTile.Box and not my SensorTile.Box Pro. I have mad sure the Pro is turned on and can connect to the ST BLE App. Any advice on how to get it to connect using the SDK would be appreciated as I have created a gui for plotting gyro and acc data in real time which can utilize the SensorTile.Box and the kit. Currently I am missing the ability to connect to the Box Pro.

Hi, I got the reference board of STEVAL-MKI141V2 that has HTS221 temperature and humidity sensor.#1I read out the calibration registers by the manual of https://www.st.com/resource/en/technical_note/tn1218-interpreting-humidity-and-temperature-readings-in-the-hts221-digital-humidity-sensor-stmicroelectronics.pdf and the result is following.    H0_rH_X2 (30) = 3A,   H1_rH_x2 (31) = 87,  T0_degC_x8 (32) = A7,  T1_degC_x8 (33) = 16    T2/T0 msb (35) = 4    H0_T0_OUT (36,37) = FFFB,   H1_T0_OUT (3A,3B) = D6E4    T0_OUT (3C, 3D) = FFFF,    T1_OUT (3E, 3F) = 0310 So the registers value of H0_T0_OUT, H1_T0_OUT also T0_OUT value are min

Hello, I am trying to get a ISM330IS IMU working. I have ordered a development kit from Mouser / ST Micro with the following board number https://www.mouser.in/ProductDetail/STMicroelectronics/STEVAL-MKI230KA?qs=amGC7iS6iy%252B%252BWAEBNHSnWw%3D%3D (photos are also attached).  I have done the wiring referring to the User Manual Section 5.1. (photo is also attached). I am using a I2C to U

Hello I'm trying to characterize LSM6DSO32X sensors on MKI221V1 using MKI109V3 evaluation board, It is crucial that I can see the output rate for my analysis.Unfortunately Unico GUI software doesn't seem to have an option to record the sensors with data time stamps.From data sheets I found that the sensors can work up to 6.6KHz, but after recording and deviding the number of samples by the record time ([sec]) I got only about 5.8KHz data rate.. Would like to have a way to find the real data rate I'm receiving with my sensors. Thanks, Lev.

I am using a I3G4250 on a custom PCB over I2C. When you first take data from it on restart it works but then after less than a second, it stops getting new data. It receives data exactly 25 times before stopping and sometimes receives about the same amount of packets more than 1 minute after.Any help is appreciated,Delta Space Technologies 

What does "shock survivability" of a module mean ? Does it imply that the module reading with not change when the module exceeds the threshold value or will exceeding the limit kill the module ? For an application of +-25g , which IMU and pressure sensor would you recommend ? 

Hi,I readed the default value of the identification register in H3LIS331DL by SPI mode and it responded with 0x32h as per the data sheet,but while reading the STATUS REG default value it responded with 0xFFh instead of 0x00h. How it's possible one register responding with correct data as per data sheet,but another one with incorrect data and for your reference see my code below. //Address deceleration.uint16_t Who_am_i=0x8F00;uint16_t STATUS_REG=0xA700; //Variable deceleration.char Status_Reg;char Identification; // Implementation part in While loopHAL_GPIO_WritePin(CS_GPIO_Port, CS_Pin, GPIO_PIN_RESET);HAL_SPI_Transmit(&hspi1,(uint8_t*) &Who_am_i, 1

Hi all,I Have a custom board that runs Linux. The board has a LSM6DSL module on it as well. the IMU driver has been ported into the Linux Kernel and I have access to the Accelerometer output registers from the Linux  sysfs entries under  /sys/bus/iio/devices/iio:deviceXin_accel_x_rawin_accel_y_rawin_accel_z_rawHowever, there is no sysfs entries for the Gyroscope output registers for user interface registers. How do I add it or enable in the driver. thanks

When trying to download either Unico-GUI 9.14.6 or 9.13.0 I keep getting the error below. Any idea how to solve that on MacOS Ventura? I have already tried opening the pkg with control+right click, etc. with no success.  

Good day, I'm currently reading data on the FIFO using Continuous-to-FIFO mode. I'm also using the lsm6dsm_STdC provided on Github. I'm doing the tests using the STEVAL-MKI189V1I've set up the FIFO to only read Accelerometer data for now. While testing, I place the device in three positions, X, Y, Z down respectively.In the test data: Data0 = X, Data1 = Y and Data2 =Z.I've set the ODR of the FIFO and Accel to 1k66Hz.While testing I get the following Results:X Pointing Down: X reads -1000mG which is expected. But Y and Z jumps between 0 and -1000. Shouldn't they both be 0?

I need to communicate by I2C my board that contains the LIS3DH accelerometer with the MKI109V3 adapter board. In order to evaluate if the sensor readings are correct.From what I understand, the MKI109V3 evaluation board allows communication via SPI and I2C. But, still not able to do it by I2C.In my project I use the following signals:SCLSDAWhile the signals:SDO/SA0 (connected to 3V3)CS (connected to 3V3)And I am using Unico-GUI software version 9.12.0.0And I have the following response.

Hi,looking in the AN5902 Finite State Machine application note for LIS2DUXS12, rev 3 on page 47, it is mentioned that using the Adaptive self-configuration (ASC) it is possible to switch from Ultra Low Power mode to High-Performance mode. However, in the AN58012 application note for LIS2DUXS12, rev 3 page 15, it says that it is not possible to directly switch from Ultra Low Power mode to High-Performance without setting the accelerometer to power-down mode.