MEMS (sensors)

Hello everyone,I want to connect my pressure sensor (ilps28qsw) and have written the code in C and using I2C. If I use the example code as in the following link, and do nothing else, it works. For example, if I pull the variables (see below) out of this function and make them usable outside of the function (ilps28qsw_read_data_polling()) or want to execute other functions before or after this code, I get an error.I cannot understand this behavior. If anyone can explain it to me, I would be very grateful. Example code: https://github.com/STMicroelectronics/STMems_Standard_C_drivers/blob/m

I am currently working on a project involving the SensorTile.Box and am seeking assistance with utilizing its gyroscope and accelerometer sensors to determine location in the absence of GPS signals. Specifically, I am interested in processing the sensor data on a PC, similar to how data is managed in the ST BLE Sensor App on mobile devices.Could you please provide guidance on the following:Data Monitoring: How can I monitor sensor data from SensorTile.Box on a PC? Are there any recommended software tools or libraries for this purpose?Integration: How can I integrate and process gyroscope and accelerometer data to determine location? Any advice on using Kalman filters or other methods for this purpose would be greatly appreciated.Resources: Are there any additional resources or documentation you can recommend that could assist me in this endeavor?I am a student currently working on this project and would greatly appreciate any support or direction you

Hi,I'm evaluating the ISM330DHCX by connecting it on a board with a linux device (imx8) through I2C. (using the st_lsm6dsx - (compatible = "st,ism330dhcx") device.All of this seems to work out of the box, and I can read accelerations through IIO sysfs like so:  root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 218 root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 226 root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 222 root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 1105 root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 210 root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 220 root@dev:/sys/bus/iio/devices/iio:device1# cat in_accel_x_raw 226  These values also nicely change with the actual orientation. But, like in the snippet above, every once in

Hi allI'm working with an STM32F405 and one LSM6DSO32 and one LIS2DU12, eveyrthing works fine, but sometimes, for unknow reason, I go a strange whoamI from my captor, I got 0x20 value, I reset my mcu and it's works fine, any idea ? For my driver I use STM driver coming from stm github rep. Here is my i2c init function : I2C_HandleTypeDef hi2c1; void I2C1_Init(void){ hi2c1.Instance = I2C1; hi2c1.Init.ClockSpeed = 400000; hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2; hi2c1.Init.OwnAddress1 = 0; hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; hi2c1.Init.OwnAddress2 = 0; hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE; hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE; if (HAL_I2C_Init(&hi2c1) != HAL_OK) HANDLE_CRITICAL_ERROR(ERROR_INIT_I2C); }  

I am using LSM6DSOX for my project. As far as I understand, meta-classifiers need to be separate for each function (for my project). But I cannot separate two_hands_free and pushing_chart functions. I think this would pose a problem for machine learning. Is this really the case? Will this cause a problem? What should I do to separate these two? And also how is the meta-classifier determined? Should I collect more data to separate these two?

I am making my own wake up interrupt program based on P16 of the application note, and it is working fine. However, I noticed that I have to enable IIS3DWB to use the wake up function, which increases the overall standby current of the system by about 1.1mA. That is not what I was expecting, as I thought that the wake-up function would run at a very low current.So is there a way to reduce the current consumption of the IIS3DWB when using its wake-up function?

Hello, I am encountering strange samples in the raw data using the IIS3DWB accelerometer. I can make several requests for raw data without issues, but at a certain point, I receive data with incorrect values at specific sample positions. Whenever an error in the raw data is observed, strange behavior can also be seen in the RMS data. Even without vibration, the sensor maintains a DC level in the RMS values. This persists for a few minutes and sometimes a few hours before returning to normal. This error has a well-defined behavior in the raw data, with a value of 2560 observed every 32 samples for the gravitational axis, and a value of 0 in the raw data of the other axes also every 32 samples. The frequency and duration of this behavior are exactly the same as the behavior described for the RMS data. Sometimes I go several days without observing this problem, but sometimes it happens more than once a day. Is

Hi,We are using LSM6DSL for one of our products and in that we have noticed that the Z-axis Accelerometer deviates due to change in temperature for a stable orientation as shown below which is affecting pitch of the product  by -1 to -2 deg.

Hi,I am fighting with the offset calibration of multiple VL53L1X. I use the API ULD with Arduino.I build a device to have 4 sensor[4] at 140mm far from a same plan. 2 of them give a good measure, 2 of them do not.I have tried the following process to calibrate for each sensor[4] ({xx,xx,xx,xx} are the value during the debug):sensor[i].GetDistanceInMm(&distance[i]); // distances are {115, 142, 143, 118} uint16_t OffSetToF; sensor[i].GetOffsetInMm(&OffSetToF); // returned values are {0, 0, 0, 0} sensor[i].CalibrateOffset(140, &OffSetToF); //returned values are {26, 65533, 65532, 23} sensor[i].SetOffsetInMm(OffSetToF); //with previous values {26, 65533, 65532, 23} sensor[i].GetDistanceInMm(&distance[i]); // distances still are{115, 142, 143, 118}Whatever the API (ST Ultra Light Driver or native ST_API), is the VL53L1X_

Hello, I'm desparately trying to find a diagram that would explain how the different sensors (accelerometers, magnetometer, gyros...) are oriented on the IKS4A1. We can find individual axis information for each sensor on their specific datasheet, but I don't know how they are integrated into the IKS4A1. I could figure that it seems that the lsm6dsv16x is upside down (Z pointing down) but it's harder to figure it out for the magnetometer (LIS2MDLSensor).Also, another thing : it seems that the Quaternion values given by the lsm6dsv16x have their Z and X axis swapped. I think that a yaw rotation (Z axis) of the board gives a roll information on the output quaternion.Does anyone has any more information ? Thank you for the help.

I would like the ability to generate an interrupt be programmed into the embedded flash so that I can use STHS34PF80 without a microcontroller. Is this possible?

Dear ST- Community, we are currently implementing a new function to our existing device with the following function: We want to detect, when the device is tilted. This function is not time critical at all. The most important fact is energy consumption. We do have a LIS2DS12 accelerometer, connected via I2C. We want to collect ACC data with 12,5 Hz / LP for the max. time before we readout the FIFO. At the moment, we readout the FIFO every 20 sec. This get us ~250 samples. The problem is, that if the time between readouts is longer than 9 sec., we can not read all samples (we take the FIFO_SRC reg. resp. the FIFO_Samples reg.). Our time delay is 10 sec., we expect 125 samples, the first time we get 125 samples, after the next readout only 17 samples afterwards again 125 samples and so on. If the time gets even longer, it looks like this:  FIFO Size: 113

Hello -I have an Accel 28 board made by Mikroe that has the LIS2HH12 device. As per the Mikroe data sheet I set J1,J2,J3 to positions 2-3. I have removed J5 so that line isn't pulled up.I've got the first 6 pins on the lower left up connected to my NUCLEO-L476RG development board.GND, 3V3, SDI, SDO, CLK and CS. I have confirmed CS, CLK and SDI have normal and good signals. Yet, SDO is distorted, almost non-existent, but does return the correct value occasionally. Please see scope pix attached. Top is SDI/MOSI, bottom is SDO/MISO. I've also tried unplugging SDO pin from Accel 28 to STM32 to confirm it's not a loading issue. On this test the function did return the correct value of 0x41 to "Who am I" (0xF) command.It's clear to see this is a peculiar signal and not normal at all. Also attached is Accel 28 schematic.Could you please offer any suggestion as to what the problem might be? Have you seen this before?Thanks! 

Hi, I am using the LIS2DW12 on my board communicating over I2C with the nRF52840.  I have not yet been able to communicate with the accelerometer at all, and all attempts to read or write end the same way (see screenshot)I have the CS and SA0 lines both pulled up to VDD, and VDDIO is tied to VDD because they are the same voltage, 1.8V.  Could there be an issue with VDD and VDDIO being the same rail? 

I have configured the activity/inactivity function, but I only get the interrupt raised on inactivity, not on activity. Is this function supposed to be able to alert me to both activity and inactivity? Or is it just inactivity that raises the interrupt?

Hello Everyone!!!I am using ISM303DAC in my project E-Compass, I am facing an issue regarding hard iron calibration. in datasheet it is mentioned that we have do hard iron calibration using external processor  and has to store those values in the internal registers of sensor.  here i don't know how to do the hard iron compensation can anyone please let me know the procedure/steps to do the hard iron calibration if any example is available with you please provide me.Thank you,regards,ANIL.

Hi, I am using MKI239A and MKI109V3 with LSM6DSV (IMU). Knowing the full scale of accelerometer and gyroscope, I still need resolution information to calculate the exact readings. I did not find relevant resolution info on data sheet... Could you please provide some information? thanks for your help! @Federica Bossi 

Hello, I am using STM32H745 to setup and communicate with LIS2DS12 accelerometer via SPI 4-wires. I am trying to setup the accelerometer and I started with reading the WHO_AM_I register. It's default value is (43h) and I changed the value of the first bit to '1' so that my STM32 can read the value. The SPI communication is setup as follows: With the read and write fucntions set like this: HAL_StatusTypeDef spi_write_LIS2DS12(uint8_t regAddr, uint8_t *pData) { HAL_StatusTypeDef ret; uint8_t address = regAddr & 0x7F; uint8_t sendData[2] = {address, *pData}; //HAL_GPIO_Wr

Hello I I'm using the -> GitHub - STMicroelectronics/STMems_Standard_C_drivers, for presence and motion detect with a NUCLEO-F401RE directly connected with STEVAL-MKI231KA, i can read the sensor ID and setup the other paramethers, but my question is related to wakeup_thread, i to setup an external interrupt connected to INT1 from the board sensor to toogle this variable? without this i think that i will not start to read the sensor properly. the example is: https://github.com/STMicroelectronics/STMems_Standard_C_drivers/blob/master/sths34pf80_STdC/examples/sths34pf80_tmos_presence_detecti

Hello,I want to enter the decimal part of a number in to filed "Float" (Advanced Features -> FSM -> Converter).The Decimal Separator in the Regional Settings of the system I use (KDE/plasma) is a comma.It seems that the "Float" field only accepts a decimal point as decimal separator, but I cannot enter the decimal point character in this field: after pressing "." key nothing appears in this field.I can enter the "," character as decimal separator, but after conversion I get the wrong result in the field "Float16".Am I missing a some option in MEMS-studio settings to solve this problem?Additional info: if the "Float" field already contains a decimal point, I can enter "." character, but if the field was initially empty, then I can't enter "." character.P.S. I remember I had the same problem on Windows and in the previous version of MEMS-studio. MEMS-studio v1.3.0My system: 

Hello, I am using STM32H745 to setup and communicate with LIS2DW12 accelerometer via SPI 4-wires. I am trying to setup the accelerometer and I started with reading the WHO_AM_I register. It's default value is (43h) and I changed the value of the first bit to '1' so that my STM32 can read the value. The SPI communication is setup as follows: With the read and write fucntions set like this:     HAL_StatusTypeDef spi_write_LIS2DS12(uint8_t regAddr, uint8_t *pData) { HAL_StatusTypeDef ret; uint8_t address = regAddr & 0x7F; uint8_t se

Hi, i'm trying to enable the tilt feature in an LSM6DSO on INT1 or INT2 but isn´t been possible until now. I´ve read the datasheet and used the example as template but for some reason the interrupt is not working. Looks like the embedded functions are not being activated correctly.  These are the registers that I'm using to configure it. First hex is the register direction and the second one is the value to write.   ConfigRegisters(IMU,0x01,0x80);ConfigRegisters(IMU,0x04,0x10);ConfigRegisters(IMU,0x0A,0x10);ConfigRegisters(IMU,0x

Hello,I'm currently working with the ICM-20602 IMU sensor and the LSM6DSV16X IMU sensor in an STM32-based project using STM32CubeIDE for stm32f446re. I've successfully interfaced with the ICM-20602 sensor and am able to read the WHO_AM_I register after ensuring that the sensor is out of sleep mode by configuring the POWER MANAGEMENT 1 register. Here is the relevant code I used for the ICM-20602 sensor: /* Function to read a register from the ICM-20602 via SPI */uint8_t spi_read_register(uint8_t reg_addr) {uint8_t tx_buf[2] = { reg_addr | 0x80, 0 }; // MSB set for read operationuint8_t rx_buf[2] = { 0, 0 }; HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_RESET); // Set CS lowHAL_SPI_TransmitReceive(&hspi3, tx_buf, rx_buf, 2, HAL_MAX_DELAY);HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_SET); // Set CS highreturn rx_buf[1];} /* Function to write to a reg

Hello! I didn't find Driver of MPL115A2 for STM32, I tried to create a simple oneI'm not able to get dynamic data from the sensor.I connected it as below:VDD > STM32 3.3VGND > STM32 GNDSCL > PB8SDA > PB9HSR > not connectedSDWN > not connectedThis is the code i'm trying    // MPL115A2 registers with bit shifts for I2C communication #define MPL115A2_REG_PRESSURE_MSB 0x00 // Padc_MSB #define MPL115A2_REG_PRESSURE_LSB 0x01 // Padc_LSB #define MPL115A2_REG_TEMP_MSB 0x02 // Tadc_MSB #define MPL115A2_REG_TEMP_LSB 0x03 // Tadc_LSB #define MPL115A2_REG_A0_MSB 0x04 // a0_MSB #define MPL115A2_REG_A0_LSB 0x05 // a0_LSB #define MPL115A2_REG_B1_MSB 0x06 // b1_MSB #define

Hi everyone!!!i am working on motionEC library and there i have observed that it need sensor orientation. can anyone explain me what exactly is this orientation meaning and how it effects the library??reagards,regards,ANIL.