MEMS (sensors)

Hi, I am trying to test the ASC with 6 classes and 6 audio files. Am modifying the same python script from the function pack and trying to create the Tensorflowlite model. Is that possible to add more classes or only we can use 3 classes?If we can use maximum 3 classes, but am trying to convert 6 Audio files into model file, then what would be the option to procedure?Thanks & Regards,Shivashankari

I trying to find a solution as to why the Z-axis on the accelerometer is not responding. It is "stuck" at 0x80 for both high and low value. X- and Y-axis both work as they should. I can disable the Z-axis and it goes to 0x0. I set block update, the 3 axis, 100Hz ODR and 2G. I have tried reading the output from Z individually and in block update, it is always 0x80. All the registers/features I do not use are at default values. I even swapped the device with a new one... still no change. I do not know what else I can try :tired_face:

I am trying to compute velocity from the acceleration values by configuring the my IIS3DWB vibration sensor at +-4g. The formula I am using to calculate the instantaneous velocity is V(t) = V0 + ʃa*dt.What I am experiencing right now is a drift in my velocity values, it is just increasing without applying any force, perhaps due to integration error. I am converting a from g to m/s^2 and I am taking dt=1/ODR (26.7kHz) and I am reading the values from 3k FIFO buffer inside the sensor. Can anyone suggest how can I calculate velocity even with near about accuracy, if not full accuracy?

Hi.i am using LMS6DSR ,and use ODR is 208Hz,but,i found that i can't get 208 samples at 1 secend.and,i had confirmed that it only about 203 Hz from Interrupt signal.so,i want to know is that normal? i can't find information about error of ODR in datasheet.

Would like to check if there any recommendation on the acceptable length for PDM bus, using MP23DB01HP.

I just want some clarification of the data output of the different modes.For example, it states in the data sheet that low power mode has an 8 bit data output. I assume that this means registers LIS2DH_OUT_X_L and LIS2DH_OUT_X_H are 8 bits each, and I can read the raw accelerometer data into a 2 byte integer. Given that the high resolution mode has a 12 bit data output, it would mean that I need 3 bytes to get all the data. It would also mean that I need to read from another register (besides low and high registers), which I don't see specified. Therefore, I believe my thought process is wrong. Can someone explain how to use high resolution mode? Thanks.Isaac

I am using the bluepill board and was trying to compute the angle from gyroscope raw data. However, when I tilt the sensor, the angle measured doesn't change as expected. It's changing between 1.xx and 2.xx regardless of the tilt angle. The sensor is being read every 4ms (I have configured the timer to interrupt at every 4ms). I have attached my code here, can anyone please help to to figure out what is the problem? Thanks!Update: I try to remove the offset but the reading is still inaccurate. When the row angle is 45 degrees, it shows around 20 degrees; when the row angle is 30, it shows around 13 degrees. Both the angle calculated seems to be around 2.3 times less than the actual angle.

Hi.When i power my board and everything else i configure sensor in continous mode and succesfully getting data for each axis. Board is parallalel to the floor then it means that for getting angle i need sensor data from x axis and from y axis. I tried with https:// blog.digilentinc.com/how-to-convert-magnetometer-data-into-compass-heading/ this approuch only difference is that i multiply data from axis with 1.5 ( i had read in aplication note that this is sensor constant to get mG) and for sensor in given web site is 0.48828125.I want to ask is it needed to calibrate sensor every time when you power you entire board ( MCU and IIS2MDC) ?Is that formula from given website good or not? Because i dont get good data when i compare with compass value from my smartphone even if i add declination angle for my geographical location to the calculated angle value which i got from the sensor.

Hi all,I'am working with an LSM6DSO32, I read this AN5473 at page 13 and 14 we have 2 tables comparing different operating modes. I have a question for gyroscope for example if I chosse ODR 208Hz with G_HM_MODE = 1 I'am in a normal mode, and if I set G_HM_MODE = 0 I'll be in high perf mode. What's the difference between normal and high perf with same ODR frequency?In high perf I'll have better result, more precise ?Thanks

Hello,I'm using the mems II2SMDC from where I get X, Y and Z values.I set ODR to 100Hz, COMP_TEMP_EN to 1 and MD_CONTINOUS to 1 for CFG_REG_A (note that low power is disable)I set DRV_IIS2MDC_LPF to 1 for CFG_REG_BI set DRV_IIS2MDC_BDU to 1 for CFG_REG_CI also enable offset cancelation (DRV_IIS2MDC_OFF_CANC) in CFG_REG_B because otherwise values are completly random / wrong.I'm using X and Y to get an angle on the plan (X, Y) using atan2.(In fact I'm using X and Z because I attached the mems to a door to detect opening, closing but it does not matter)My algorithm is a lot inspired from this post : https://arduino.stackexchange

I am receiving the following error when I was working through the industrial webinarError: Time:Thu Jun 3 18:09:35 2021 File:C:\nobackup\Code\repo\FP-CLD-AZURE1_New\Firmware\Middlewares\Third_Party\azure-iot-sdk-c_public_preview\umqtt\src\mqtt_client.c Func:onOpenComplete Line:455 Error: failure opening connection to endpointError: Time:Thu Jun 3 18:09:35 2021 File:C:\nobackup\Code\repo\FP-CLD-AZURE1_New\Firmware\Middlewares\Third_Party\azure-iot-sdk-c_public_preview\c-utility\adapters\tlsio_mbedtls.c Func:tlsio_mbedtls_open Line:623 Underlying IO open failedError: Time:Thu Jun 3 18:09:35 2021 File:C:\nobackup\Code\repo\FP-CLD-AZURE1_New\Firmware\Middlewares\Third_Party\azure-iot-sdk-c_public_preview\umqtt\src\mqtt_client.c Func:mqtt_client_connect Line:1044 Error: io_open failedError: Time:Thu Jun 3 18:09:35 2021 File:C:\nobackup\Code\repo\FP-CLD-AZURE1_New\Firmware\Middlewares\Third_Party\azure-iot-sdk-c_public_preview\iothub_client\

DRIVER TO ASEMBLY BY MPLAB

Hello STM,looking the the mainline kernel for the IMU line, i see some comments in the code that say the only supported ODRs are that of up to 416 Hz. is it possible to run the sensor in high performance mode with the current linux driver? Is there a patchset that provides support for this or is this something that is unsupported with linux?https://elixir.bootlin.com/linux/v5.12-rc8/source/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c#L18regards,wes

Hi to allI'm a newbe for this things.My intention is to use the Intensity Detection application for the this system: NucleoSTM32L152 + X-Nucleo-IKS01A3 with ST32CubeMX version 6.21 and ST32CubeIDEversion 1.61.I downloaded MEMS examples from https://www.st.com/content/st_com/en/products/embedded-software/mcu-mpu-embedded-software/stm32-embedded-software/stm32cube-expansion-packages/x-cube-mems1.html.I copied the application IntensityDetection (for NucleoSTM32L152 and X-Nucleo-IKS01A3) into my workspace (NucleoL152RE).I opened the IntensityDetection ioc file with STM32CubeMx. I migrated to a newer version of firmware of ioc (as suggest) and then I generated the code.I opened the

This VEML6075 looks fantastic for UVA, UVB, and UV Index sensing, but after release in 2016 is already marked obsolete? Why? I can't find any explanation. Are there any suggested alternatives? I can't find any in some extensive web searching.

Hello everyone,I am trying to communicate with an accelerometer. But for some reason can't get the SPI read function to work.Originally I wrote the following code to read the temperature, it did not work: uint8_t CMS300_read(uint32_t addr, uint32_t *data) { addr |= cmsCRC(addr);   uint8_t *p = (uint8_t*) &addr uint8_t txBuf[4] = { p[3], p[2], p[1], p[0] }; uint8_t rxBuf[4];   HAL_GPIO_WritePin(SPI1_SEL_GPIO_Port, SPI1_SEL_Pin, GPIO_PIN_RESET); uint8_t status = (HAL_SPI_TransmitReceive(&hspi1, txBuf, rxBuf, 4, HAL_MAX_DELAY) == HAL_OK); HAL_GPIO_WritePin(SPI1_SEL_GPIO_Port, SPI1_SEL_Pin, GPIO_PIN_SET); *data = rxBuf[3] | (rxBuf[2] << 8) | (rxBuf[1] << 16) | (rxBuf[0] << 24);   return status; }   int main(void) { while (1) { uint32_t data; CMS300_read(REQ_READ_TEMP, &data);   printf("Result: 0x%08X\r\n", data);   HAL_Delay(1000); } }Basically the "

 I want to know if anyone else has encountered this, I have multiple HTS221 on different boards, and they all give me different temperature values. They are "working," in the fact that when I put my hand on the sensor the temperature increases, etc, but are just giving me wrong temperature values. I have begun to suspect that it is the factory calibration values. Here are the calibration values and temperature readings from 3 different boards above. You c

Hi all,I'am working with LSM6DSO32 and I would like to understand better the relation between ODR and bandwith. What I understand, ODR is output data rate, this is the time where I can read a packet, for example in page 68 of the datasheet Gyroscope ODR configuration setting, if I choose ODR 208Hz the meaning is : I can read data from my gyro every 4.8ms is it right?So now the bandwith what is it? For examploe page 74 Accelerometer bandwidth configurations, I can read ODR/20 for example what is the meaning ?Thanks

Hi ST support team,Am present working on TESEO-LIV3F GPS interface, these device is used on my customized board for GPS co-ordinates latitude and longitude, but here am facing some issues mentioned below.1.My GPS co-ordinates longitude and latitude values are not updated with actual location of minebelow is the figure, am receiving serial packets from gps (teseo-liv3f), in that screenshot $GPRMC packet is updated to zero's.2. 100nf capacitors are placed in my RF section of gps, is capacitance value is supported to my RF range or it need to be changed, also please check my schematics below any other need to be changed.3.Please provide me a sample code for enabling gps interface or tell me the procedure for enabling gps interface with MCU(QN9080).4.How to check in GPS whether antenna position is mounted in correct direction ..!

Can I leave INT pins (INT1 and INT2) unconnected for the LSM6DSO accelerometer and gyro sensor?In the "internal pin status" table It says that the INT2 pin is forced to connect to ground. I use neither INT1 nor INT2 in my project.Thank you,Batuhan

Hello,Our board is streaming accelerometer, gyrometer(lsm6dsox) and magnetometer(lis3mdl).It sleep and wake-up depends on accelerometer threshold.Usually data is streamed out well.But time to time, data is not updated from magetometer after wake up.In below picture, from -800 to -400, same value is read although sensor is shaken.After power reset at -400, sensor data is read well again.Since WHO_AM_I is checked every time after-wake up, I think SPI or sensor is okay.Below is register setting during initialization.void motion_init(void) { uint32_t err_code; uint8_t whoamI, rst; lsm6dsox_pin_conf_t val; lsm6dsox_pin_int2_route_t int2_route; lsm6ds

Hello, I am trying to interface MP34DT05 - MEMS Audio sensor in mono configuration to read audio samples from sensor. Basic working of PDM Audio sensor states that, the analog signal will be sampled at PDM CLK frequency and outputted as pulse modulated bit stream at CLK frequency. Here is my sensor connections: -Sensor Vcc to 3V (in range as per datasheet)-Sensor GND to GND-Sensor SCLK pin to CLK pin of kit-Sensor DOUT pin to DIN pin of kit-Sensor LRCLK pin i havent connected as it's grounded internally as per datasheet. Even if i connect it to GND /VDD externally nothing changes.So as per the datasheet of MP34DT05 minimum PDM CLK frequency input is 1.2MHz and typical is 2.4MHz. And also the startup time required by the sensor is 10ms (as per datasheet). So when i apply the 1.2MHz, the PDM sensor should output the pulse modulated bit stream at same CLK frequency. But in my case the output bit stre

Hello, Eleon. My app tells be that v3.47 firmware for the sensor.box is available. The Android app tries to download and install but I never could get that to work properly. Can you post the new v3.47 firmware please.Thanks,Tony

I can't figure out the right implementation of LSM303AGR offset cancellation with single measurement mode. If I set to 1 OFF_CANC an OFF_CANC_ONE_SHOT in CFG_REG_B_M, then I have to do 2 readings and apply the Offset cancellation formula? The SET / RESET pulses automatically alternate with each other on every reading?

Hi ST Community, We have been trying to test and adapt the LSM6DSO evaluation board (STEVAL-MKI196V1) for a project but have run into difficulties communicating with it using SPI. It functions and behaves as expected when placed onto a Profi-Mems board (STEVAL-MKI109V3) and configured within the Unico GUI. We connected it successfully to a Nucleo-L031K6 board and were able to read and write to all registers using I2C. When we decided to communicate instead with SPI, we ran into difficulties. We have limited communication with the LSM6DSO: we are able to successfully read the WHO_AM_I (0Fh) register with a value of 0x6C as expected and write to the FUNC_CFG_ACCESS (01h) register to enable and disable access to embedded function registers. However, we are unable to correctly communicate with the CTRL1_XL (10h) and CTRL2_G (11h) registers to set the accelerometer and gyroscope. We are able to read and write values less than 0x0E to each of the