MEMS (sensors)

Hi there, The LIS2MDL Application Note (AN5069) states that the min and max values for each axis needed to run the self-test can be found in the datasheet. However, there is no information in the datasheet. The application note of the LIS3MDL, on the other hand, provides all values. Could someone please advise which values to use for the self-test of the LIS2MDL? Best regards

Hi,Im using LSM6DSV16B & IIS2MDC for one of my project , how can i find heading using these sensor. Is there any library available for heading calculation?

Good morning,I want to use the ILPS28QSW to measure pressure and detect water.I use the development board (STEVAL-MKI223V1K) to test the ILPS28QSW.Measuring the pressure works perfectly.I am currently working with Qvar, but i do not yet fully understand what result i should expect.When I connect the STEVAL-MKE001A I get the following Qvar data:LSB mV °C-4423186 -10.38 21.55-4480098 -10.52 21.55-4587456 -10.77 21.56-4570778 -10.73 21.56-4558559 -10.70 21.55What kind of data do I expect? Is the Qvar data correct?In addition, water can be detected using Qvar if the sensor is assembled in a plastic housing??

Hello, I'm experimenting with algobuilder, motionFX and IKS01A3 + SMK1229AAA.Btw, very cool app for investigation.My goal is to obtain vertical speed. As motionFX provide gravity vector with magnitude 1 (let's call it G) and linear acceleration vector (let's call it A).I computed the vertical acceleration with the dot product A.G which leads toAx * Gx + Ay * Gy +Az * GzIt looks like this method gives the expected result: I get the "same" curve for the "same" vertical movement whatever the orientation of the device and whatever the direction of the movement. (I used quotes for "same" because I'm moving the device by hand ie the movement is not an exact reproduction of the previous one). However, it seems that there's an offset in result which depends on the orientation. It is particularly visible when the device is not moving: there's still a residual computed speed. If I flip the board, the residual speed is inverted.You can see it on the screenshot.Here a

Hi,I am testing the Soundmeter Example provided in STM32CubeMX for the NUCLEO-F401RE board in conjunction with the expansion board NUCLEO-IKS02A1.The example works, but the results I get in the Unicleo GUI are not the expected ones.I am testing the board in the office of my company with a class 2 sound level meter at the side.The noise in dBSPL  that tipically is present is around 50-60 dBSPL.I am running the Example Project as it is and I only have modified one line of code to select the Prefilter Type for the Sound Meter Library in file audio_application.c line 172:/* SMR dynamic parameters that can be updated here every frame if required */smr_dynamic_param.enable = 0; /* SMR module enabler */smr_dynamic_param.averaging_time = AUDIO_CFG_SMR_AVGTIME_DEFAULT;smr_dynamic_param.filter_type = SMR_PREFILTER_AWEIGHTING;/*SMR_PREFILTER_NONE;*/smr_dynamic_param.mean_level_left = -45;smr_dynamic_param.mean_level_right = -45; If I select SMR_PREFILTER_NONE, as default, the noise valu

Is there any function I can use to calculate the yaw and pitch directly from the IMU? Or do I need to find the quaternion(SFLP) and then calculate Euler's angle on my own? 

Hi, how can i take values of the iks01a3 sensor (in particular LSM6DSO) in CubeIDE (or Arduino IDE). The value of the angle, and so on.

Hello Everyone,I am using ISM330DLC and able to read X,Y,Z and motion FX library in my application (Gyroscope) to get Eluer angle's and here is my doubt that before giving the senor raw data to the FX library, we supposed to do the gyroscope calibration or the FX library will handle calibration?

Hi, I'm using MotionFX library v3.0.0, even if i do compass calibration, yaw value is still drifting some times. do I need to use MotionMC library to get better results?

Hi Experts,I am using lis2dw12 accelerometer connected to esp32s3 and recently have got a situation which is blocking for esp32s3 to read status registers of accelerometer when LIR =1 (latched mode). I put accelerometer on stationary  mode and routing the intruppt to INT1 which resets my esp32. Interrupt is working fine but when I want to read tap_source or wakeup_source or in general ALL_INT_SRC ( not pulling them. only one time) to detect the reset reason on my esp32 side, It will be hanged sometimes until esp32 watchdog happens and from that point the status register are readable since i2c is reinitiated I guess. Whould you mind please help me to underestand why acccelerometer get frozen?Here is my configurations:write2i2c(acc_addr, LIS2DW12_CTRL1, 0x10, 1)write2i2c(acc_addr, LIS2DW12_WAKE_UP_DUR, 0x30, 1)write2i2c(acc_addr, LIS2DW12_WAKE_UP_THS, 0x42, 1)write2i2c(acc_addr, LIS2DW12_CTRL4_INT1_PAD_CTRL, 0x20, 1)write2i2c(acc_addr, LIS2DW12_CTRL_REG7, 0x20, 1)write2i2c(acc_

This video is really good, and details how to integrate the IKS01A3 with the NUCLEO-WL55JC.Beyond this, there is no documentation re what other expansion boards can integrate with the NUCLEO-WL55JC.In fact other expansion boards explicitly indicate the specific boards they do integrate with. And none of them indicate NUCLEO-WL55JC.To make the NUCLEO-WL55JC useful, it will require expansion boards. Is this info somewhere? Is there a roadmap?

GreetingsI am trying to read from the FIFO of the LIS2DW12. What confuses me, is that reading through the datasheet, there are only registers which indicate the number of unread samples in the FIFO (FIFO_SAMPLES (2Fh)), and a control register FIFO_CTRL (2Eh). What I am expecting, are dedicated registers from the conventional OUTPUT registers which a device like the LSM6DSOX has. The LIS2DW12 does not possess such registers, thus what address do I do a read from, that will be able to provide the 32 samples it is able to hold in its FIFO? Will it be the conventional OUTPUT registers?Any help would be appreciated.Thank you.

I am trying to configure a LSM6DS3 to capture Tap events in the FIFO similar to how Unico does. i.e. I press "Continuous to FIFO" button (to enable a new capture), then tap the sensor, and the acceleration of the tap event appears on the screen (after being read from the FIFO).I used Unico to derive my configuration. It is here in csv format:Addr,Name,Value (hex), comment10,CTRL1_XL,60,ORD==416Hz06,FIFO_CTRL1,60,FIFO Threshold, FTH == 96 words, 32 samples, 3 (x,y,z) axis07,FIFO_CTRL2,00,08,FIFO_CTRL3,01,accelerometer, no decimation09,FIFO_CTRL4,00,0A,FIFO_CTRL5,33,FIFO ODR==416Hz, Continuous-to-FIFO5F,MD2_CFG,40,Note: AN5040 - Rev 3 "8.2.4 Continuous-to-FIFO mode", "Single tap: event detection has to be configured and the INT2_SINGLE_TAP bit of the MD2_CFG register has to be set to 1;"13,CTRL4_C,00, STOP_ON_FTH==0 (configuration A)13,CTRL4_C,01, STOP_ON_FTH==1 (configuration B)With this configuration I expect that the FIFO will contain: * 32 accelerometer samples fo

"While transmission of data via the USART COM PORT is not detected, which driver should I use on windows 11  for COM PORT detection?"     i have use many drivers till now but not getting any satisfied solution.

Hi,I want to know the difference between IIS3DWB and ISM330DLC.Why we are calling IIS3DWB as vibration sensor while ISM330DLC has accelerometer inside with the same specifications as in IIS3DWB? Which is better in monitoring the vibration in motors?Thanks

I want to let the LIS2DH12 FIFO fill and wrap freely and then at a point in time access the history (LIS2DH12 contents) in a particular manner.  I want to first read the newest 15 samples (in any order) and then read the oldest 15 (in any order).  I need to compare the average of the older 15 to the average of the newer 15.  Can this be done?Background ...I am designing a camera and I'm using a sensor that doesn't have anti-shake.  I've included an LIS2DH12 on the PCB.  The theory is that I can look through the acceleration data and detect shake (motion jerks).  If I see the new readings average is significantly different from the old average then I will know a jerk has happened.  I will keep taking captures from the sensor until I see that there were no jerks during the capture. I tried just averaging the acceleration vector magnitude (sum of squares) across all samples and use a threshold as a jerk detection.  Unfortunately I couldn't

Hi,We are using LIS2DH12TR accelerometer sensor in our application. Attached is the circuit for the same. We are using a P-channel Mosfet part# BSS84W-7-F to switch the sensor on/off. We are able to switch On the sensor through the Mosfet but we are not able to switch it Off. We are able to get the sensor data on I2C lines read by the controller though we are turning it Off through the Mosfet. Do I need to select Chip select CS = 0 for completely turning it off ? We are getting supply or voltage at VDD/VDDIO even if we remove or unmount the Q1 mosfet and all the related resistors(R5,R8,R10,R11) whereas CS=1. When we keep CS=0, then we are not getting supply/voltage at VDD/VDDIO. Can you please help us to understand why is this phenomenon occuring ? Waiting for your reply asap..Regards,Kamesh Lakhwani

I am working on a project to connect the AIS2IH accelerator with the MSP430FR2532 board for an motion detection product. I had decided to use the SPI bus interface to connect the two devices. The hardware connection are as follows: MSP430AIS2IHSPI meaningP2.2CS(AIS2IH specific?)P1.1/ USB0CLKSPCSCLKP1.2/UCB0SIMOSDISIMOP1.3/UCB0SOMISDOSOMIFor the SPI set up on the MSP430 board:1. Set the to send Most Significant Bit first based on AIS2IH SPI requirement2. The Clock Polarity is set high as the clock when inactive must be high3. Similarly when there is no SPI operation P2.2 is set high and for a SPI operation P2.2 is set low4. The Clock is turned off prior to setting a the P2.2 -> low. I had done this because as per my understanding regardless of the clock state or power mode in the MSP430, the clocks are set to active state for peripheral operations(From section 3.2.12 in MSP430FR2xx family user guide)When trying to use the ais2ih driver to identify if the device is connected, I g

Hello dear ST-Forum,I have a problem that I can't solve, the sound coming from the microphones is very noisy and none of the acquired data sounds like a sound and this despite all the documentation (MP34DT01 datasheet, AN4990, AN5027, ...) and videos (STM on youtube) that I have seen.I use an Octave program to retrieve the sound data from the UART port.My DFSDM configuration is: 80MHz audio clock, divide by 40. So I have 2MHz PDM clock and I use a low-pass filter (Sinc 3 filter) with FOSR=125 so I capture a signal at 16 kHz. The card has 2 stereo microphones, so I didn't forget to put a channel on the rising edge and a channel on the falling edge.Here's the code for the microcontroller program and for the Octave program.For the variables: #define AUDIO_REC 2048int32_t RecBuff0[AUDIO_REC];int32_t RecBuff1[AUDIO_REC];int8_t FullConv0 = 0;int8_t HalfConv0 = 0;int8_t FullConv1 = 0;int8_t HalfConv1 = 0;int32_t PlayBuff0[AUDIO_REC];int32_t PlayBuff1[AUDIO_REC];I only use STM32CubeIDE de

Hello All,Need to read the values from the embedded Temperature Sensor in LIS3DH via I2C communication I had made the following configurations as mentioned in the datasheet,1. CTRL_REG4(0x23) = 0X802. TEMP_CFG_REF (1Fh) = 0XC03. Trying read the temperature value from the following register OUT_ADC_3_L(0x0C) and OUT_ADC_3_H(0x0D).     - Getting the value from the OUT_ADC_3_H(0x0D) as 8. If I expose heat near to the chip the value is increasing. How to convert this(8) value to temperature?Kindly assist me to get the conversation formula. Here the Vdd supply = 3.3V. Thanks in Advance. Regards,Surya S   

Hellow community, I'm currently working with the IIS3DWBTR sensor, which I purchased from Mouser Electronics. I've encountered an issue where the `WHO_AM_I` register (0Fh) is returning a value of `0x76`, whereas the expected value is `0x7B`.The SPI bus signal seems fine, and I've checked the usual suspects such as clock speed, voltage levels, and signal integrity. The sensor initialization also appears to be correct.Has anyone else experienced this issue or have any suggestions on what might be causing this discrepancy? Any help would be greatly appreciated.Best,

I need to clear the fifo and then at a later time read all samples taken since then.  Then later I will repeat this. I don't want any samples before or after that time window to get in my data.  I looked through the library and I can't see anything that will reset the fifo.  How can I achieve the time window sampling I describe above?  Thanks in advance ...

Hi, I am using MKI109V3 as motherboard and MKI239A as IMU adapter. My Unico version is 9.16. Following UM2116, I tried everything in Windows 10, including firmware upgrade to 3.58.2 (latest), and all data display works fine in Unico.After that, I wanted to check if Unico also works in Linux as suggested in UM1049. I installed it in Ubuntu 18.04 and used "sudo chmod 666 /dev/ttyACM0" to open the serial port. I double checked and am sure that ttyACM0 is the relevant one for USB connection of motherboard.However, after opening the port in terminal and choosing MKI239A in Unico GUI, another error message shows that "COMMUNICATION ERROR! Please reconnect the board and click 'OK'". I am confused and was wondering what I should do for troubleshooting... Maybe I missed some settings?Thanks! 

Hi, I am currently using an ASM330LHH MEMS, and seem to be getting erroneous spikes in data from the temperature sensor (see attached image). Please can someone advise on what this may be, or if you have experienced the same issue? I have been working through the temperature decode in my data acquisition (which seems to be okay), but I could be wrong. Many thanks. 

hey there,Im trying to use lis3dh in low power consumption mode and hope to get advices on how to use the interrupt and the registers set up for minimum power consumption aiming to few micros.