MEMS (sensors)

Hi TeamWe are currently working on ST PN: LIS2DW12TR in our new project. Thus, I would like to check with ST whether this part is OK to be Conformal coated? The reason is, our PCB will need to be conformal coating after all the components are populated on it. Hence would like to understand if there is any risk for this ST component to go thru this conformal coating process.Regards,Abishek

Hi!I'm using the LaunchPad CC2642R1/CC2652R1 with the accelerometer LIS2DH and i tested the "who am i" (0x33) register to validate the protocol but when i tried read another register i had the same response that "who am i" (0x33) register. Could you help me with this problem or give me some ideas to solve it?How can i set up the accelerometer? I can't read any register other than who am i (this register is shows in each reading).Thank you in advance.Best regards,Tania

Sorry for the I'm too stupid to figure this out myself question, but couldn't figure out how to do this myself. In CubeMX Pinout & Configuration under software packs, I can install MEMS support, add a LSM6DSO (and required support elements) using i2c. In the Software Packages I can configure the mems and the LSM6DSO (including the SD0/AD0 pin for LSB of the address). But, how does one add a second LSM6DSO to the project? Configuring the second slave address looks easy enough, but I need a second sensor instance first. Do I have to manually replicate the generated code used to create the first instance or is there some built-in way to "give me another i2c device with this configuration" option?

I have recently purchased the SensorTile development kit.I installed/soldered a sensortile and I noticed the LED didnt come on.I then felt the CPU was getting very hot.I reinstalled another sensorTile and the very same thing happened.Note I was extremely careful the second time I soldered the device so I am confident the rework was ok.I checked the various voltages to the sensorTile with an oscilloscope and everything looks good.

We are migrating from LSM6DSR to LSM6DSOX. In LSM6DSR the nominal timestamp resolution used to be around 25 μs. And we used to get 52 samples/sec from the FIFO.However, in LSM6DSOX with a similar setting, we are getting a resolution of around 18 μs. And hence sample has gone up to 72. What should changes be made to get similar samples as LSM6DSR

Hello communityI'm having issues with the STEVAL - MKI109V3 board and the Unico GUI. There is no driver identified for the board. I've tried installing the driver for Windows 8, which gets identified but when I try to open Unico GUI, I get an error message stating that it can't connect to the board, and the program closes.After some investigation there are more people that have had this issue, but I have not found a solution that works for me. Has anybody had experience with this and found a solution?

After all installations I cant find my board(NUCLEO-L476RG) in the projects folder.According to example these board are valid:NUCLEO-F401RENUCLEO-L053R8NUCLEO-L152RENUCLEO-L476RGBut these boards could be found:NUCLEO-F401RENUCLEO-L073RZNUCLEO-L152RENUCLEO-U575ZI-QIs one of the existing boards compatible with L476RG or what to do?

Hi ST community,Currently we are trying to use the LSM6DSO (6 Axis MEMS sensor) in our project.We were able to successfully test the LSM9DS1 (9 Axis MEMS sensor) using the ST Adapter board STEVAL-MKI159V1 and we had no issues communicating with it and were also getting very good results.For this adapter board, we connected:-Vdd = 3.3v-VddIO = 3.3v-SDO = SPI MISO-SDA = SPI MOSI-SCL = SPI clock-CS = SPI chip select (Negated)And ofcourse the Ground pin as wellAnd whenever we send the command 0x8F to read the WHO_AM_I register (Register address 0x0F) via SPI we get the correct response back which was 0x68 from the accelerometer/gyroscope module and 0x3D from the magnetometer. And these are the correct values that are described the LSM9DS1 datasheet.Now we trying to communicate with the LSM6DSO (using ST Adapter board STEVAL-MKI196V1), by doing the same exact connections like the LSM9

Hi,We have received a new batch of boards and the sensor is not responding (The only change is the solder mask colour) to the "Who_am_I_ID" command. In the previous batch every thing worked as intended.Is it possible to, based on QR code, to see if these two chips are the same component, see images below? When measuring the SPI communication, the clock and MOSI seems OK, but the MISO signal is ~1.5V and is not responding. On the working board the signal is either 3V or 0V.What could be the issue? BRJohannes

I put a logic analyzer on the I2C and INT1 line, and note that the INT1 continues to trigger but the I2C lines do not show data transfer anymore. Are there known issues? Is it a problem with the sensor or the host code? It may be dependent on the ODR (with faster ODR increasing likelihood). I am trying to evaluate how stable the heading orientation is over long time periods when using the 6-axis fusion (quaternion output).

Dear ST Community,Have no experience with STM32 MCUs nor with any programming IDEs used to develop for STM chips. As i am developing on espressif MCUs...However recently i am trying to integrate a MEMS sensor of STM into my project.I found out Unico GUI is meant to be a software which would allow developers to design Machine Learning Core and/or Finite State Machine solutions and also export those as C .h files to be used within user code.Unico also has the "offline" feature which would allow to use Unico's capabilities even if one does not have access to any of ST motherboards and sensor evaluation boards. The input for Unico is raw sensor data logged into a file in that case.While i can start an offline MLC workflow in Unico and have expected output, i simply can not do anything in offline mode when choosing an FSM workflow. By that i mean:If i try to load any .ucf files, then Unico tells data has been loaded, b

I have about 10 of these devices on about 6 computers, so this problem is common, the device runs at about 1200 to 1400 Hz. The picture shows a temperature, frequency and FFT results plot for one device. The typical is about 1400 +- 50. I take and FFT every 16384 data points, but I have to measure the time for each 16384 data points and adjust the FFT results. I have calibrated it against a standard accelerometer on a known vibration element. Is this the expected behavoiur? it is not temperature dependent and only windows is running on the devices as they are remote. I do not mind, I just want to confirm it. One has to use the ticks on computer clock as the return on the time registers is not accurate enough nor calibrated.

MLC explanation link: https://community.st.com/s/article/how-to-use-machine-learning-core-in-automotive-appli

When running the single shot with offset cancellation mode we will occasionally get the following measurements for the magnetometer:x = -1y = 0 z = -1 temp = -1 This causes issues for us as we are manually averaging the two single shot values together to get the true temperature compensated magnetic values. We have seen this on both our PCBAs as well as the STEVAL-MK185 boards connected directly into our system. Mainly we want to know where this message is coming from and how to prevent it. Thank you.

I get the readings from ax,ay and az(plotted as well).Can the orientation of the lis2dw12 chip be derived from the DC levels? If so - how? What is the purpose of 6D orientation functionality and the accuracy of it?

Hi,i was trying to set up the pedometer and timestamp functionality for the FIFO.I was fallowing the instructions on page 102 (chapter 9.1) of the documentation for the setup (high timestamp resolution).It is working on a FIFO ODR of 104Hz. But if i go higher with the ODR, I do get timestamp duplicates in the FIFO buffer.So the first 3 readings are at 2 for the timestamp. Are there any limitations on the use of the fifo timestamp?The results seem to be valid for 104Hz. With a FIFO ODR of 208Hz, e. g. I should get a timestamp counter difference of round about 192LSB (=192*25μs=4.8ms). Am I missing something?Thank you very much

I have successfully built AlgoBuilder-based Firmware for my Target, including using some of the ISPU based examples from the x-cube-ispu GitHub:NUCLEO-L476RG + X-NUCLEO-IKS02A1 + ISM330ISWe are hoping to replace an old accelerometer and separate temperature sensor chip in our design with the very capable ISM330IS. I'm evaluating it for basic accelerometer, gyro, and temperature sensor use as well as the 6-axis fusion (quaternion outputs) If I add the "Temperature" block to my SensorHub, I get the error:Error: Block "Temperature [°C]" requires capability "TemperatureSensor" but current build target does not have this capability!In my own code, I expect I can just read from OUT_TEMP_L (20h), OUT_TEMP_H (21h) or ISPU_TEMP_L (68A4h), ISPU_TEMP_H (68A5h).Just curious how to do this directly from AlgoBuilder

I'm using an LSM303AGR to create a compass using the MotionEC library for calculating quaternions.Since the ODR of the magnetometer inside the LSM303AGR is 20Hz while the ODR of the accelerometer is 25Hz with which frequency and with which data is it better to call the MotionEC_Run function?

Hello everyone!!!!I am using Motion_FX (9 axis) library in my application and receiving the values of Yaw, Pitch, Roll and Heading but these values, which i am receiving are not constant even if i kept the sensor in a fixed position values are varying with +/- 5deg for example if we consider heading values and rotate the sensor board to 90deg and kept it fixed for that position then i am receiving values like 89.78, 87.82, 86.43, 90.12, 90.12., 91.56, 93.75 like that...i am not getting a fixed value of 90 deg...how can i get fixed values...Awaiting for your valuable reply,Thank you!

Hi, I use LSM9DS1 in my project. I also use MotionMC and MotionFX libraries to calibrate the magnetometer and fuse data respectively and I have a following problem regarding the yaw output. The roll and pitch work flawlesly but the yaw output reading gets stuck - it does not respond to any movement unless I apply some amount of acceleration to the board. Slight tapping usually forces the yaw to update to somewhat correct orientation. What can I do about it? I first perform mag calibration until the CalQuality is equal to MMC_CALQSTATUSGOOD. Then I apply the hard bias as well as rotation matrix before updating the Kalman filter from the MotionFX lib. The ACC/Gyr ODR is 119Hz, magnetometer 80Hz. I also perform mag calibration once every few samples online. I also found out the calibration does not work when the mag ODR is bigger than 80 Hz for some reason - the CalQuality is always MMC_CALQSTATUSUNKNOWN.

Do the MEMS LSM6DSD, LSM6DS3, LSM6DSO have better 'shock resistance' than the LSM6DSR?The following phrase CAN NOT be found in the LSM6DSR datasheet, but the comment is in LSM6DSD, LSM6DS3, LSM6DSO datasheets"High robustness to mechanical shock makes theLSM6DS3TR-C the preferred choice of systemdesigners for the creation and manufacturing of reliableproducts.."When testing we have observed better "shock resistance" in the LSM6DSD and LSM6DS3 than in the LSM6DSR.CheersWayne

Hey There, iam using a LIS2DW12 on a STEVAL-MKI179V1 eval board :https://www.st.com/en/evaluation-tools/steval-mki179v1.html#overviewhttps://www.st.com/en/mems-and-sensors/lis2dw12.html#overviewThe Datasheet says that it has 50nA standbycurrent and 1-5 uA in oparation.Iam using the chip in single_data_conversion mode with softwaretrigger Iam triggering a measurement, reading the values over i2c and the chip goes to standby after that.The Chip offers 2 Powerpins VDD and VDD_IO .VDD has a consumption around 50-60nA in standby but

 Hello.I had to interface an IR sensor for object detection and distance measurement but I'm using a normal IR transmitter and receiver and there's a lot of interference due to sunlight. So I want to pulse the IR transmitter and subtract the readings when it is on and off and remove that constant value so I'll be able to get the normal distance. So I thought that my above circuit will work and I will be using a timer function to pulse the IR transmitter but where I will I connect the timer port to? Because 5V is the input and the other terminal is ground. Please help. I thought instead of 5V if I connect it to the timer output but I'm afraid it'll be unable to drive the IR transmitter.

For VL53L5CX: what does "ResultsData->distance_mm[ZoneNum]" exactly mean? Is it the distance of the object in the zone from the sensor in a straight line or is it the distance of the vertical plane in which the object is located from the sensor, when I place the sensor directly against a wall, the distance shown is greater in the middle zone and less in the surrounding zones? How to convert the straight line distance from the sensor to the object in the zone?

Here I used BLUENRG-LP SoC with ​ASM330LHH. We have the same schematic design in steval-IBD11V2A, like the first image. The second one is our schematic design.My I2C configuration init function is like:/** * @brief Configures the I2C interface used for the sensor ASM330LHH. * @param None * @retval None */ void BSP_I2C_Init(void) { /* Initialize the GPIOs associated to the I2C port */ BSP_I2C_DATA_GPIO_CLK_ENABLE(); LL_GPIO_SetPinMode(BSP_I2C_DATA_GPIO_PO