MEMS (sensors)

The device wasn't being recognized or accepted on the Unico software, and on the basis of something I read on the forums, I decided to update its firmware. I used the Dfuse program, and was told that updating the firmware was successful. However, when I clicked Exit DFU Mode on the Dfuse software, the entire board powered down and stopped responding. Now the blue led does not light up, the computer doesn't recognize it, it seems completely dead.

Hi, i'm trying to run the beamforming demo on bluecoin. connected the bluecoin core to coin station and then connected to laptop. It has been detected on port and I recorded voice on audacity by choosing stm mic. The issues is no matter I rotate the bluecoin around I record my voice with same intensity in audacity.It is supposed to lessen the intensity when speaking from different direction right?

HiI am trying to record audio at 44.1 KHz with the on board microphones on B-L475E-IOT01A1 device, and since the firmware package does not contain DFSDM example for this particular board, I tried adapting the DFSDM example from the STM32L476-DISCOVERY board.I have got the peripheral working with 2 Channels set up (channel 2 and 1 feeding into filter 0, 1) and I am also getting half and complete regaular conversion Interrupt service routing callbacks, however the audio is all garbled.Has anyone managed to get this to work on this particular board.Any help would be greatly appreciated.ThanksSubhojit

Posted on April 01, 2018 at 20:13I am trying to modify the SensorTile AudioLoop sample project to save the audio to an SD card, instead of sending it out to the audio DAC and USB. I have successfully managed to save some audio data to the SD card, but the quality is not great. Please see the attached .wav file oh my trying to speak 'this is a test'.Any audio pros have any idea what is missing?I created the attached audio file by loading the saved PDM file from SD card to Audacity. I loaded it as 'raw' format, mono, 16 bit frames, and about 30kHz sample rate.#stm32-audio-framework #audio #mems-microphone

Hi,I'm new to the forum here so please be kind if anything is not getting too clear or any information is missing.Is was trying to prgramm a SX1276 using CubeMX. So the programm seems to work and I can see signals in 'Logic'. I can see the clock and the MOSI signal (see picture below). Just the MISO signal is not there. So I was guessing that something is wrong with the SPI settings in CubeMX. Anyway everything I tried so far didn't help. Does anybody have an idea?

Hello,LPS22HH hardware guidelines talks about a membrane to protect from rain or dust. Do you have some references of such membranes please?Best regardsMich

Hi everyone.,We are working on a medical device that will work for rehabilitation of patients who has upper extremity diseases. We have to know the exact location of the device in real time and send it to PC via bluetooth. We will not have a chance to do 6 point calibration because device will move only in x-y plane (on a flat table). So far, first i calibrate the accelerometer as taking 4000 samples, getting median of these samples and subtracting these medians for all measured data samples. I can get around +-1 g for all axes when i do orientation of STEVAL-MKI178V2 accordingly. First of my questions is that, would you suggest any other calibration method for this application which requires precision as much as can be done?(At that point, I want to mention here non-calibrated, steady accelerometer data values are (-0,441 g), (-0,380 g), (0,582 g) for x,y and z axis respectively. Does these steady state offset values make sense? I could not understand why this

I am developing an application based on the STM32L476 on the SensorTile. I need to be able to configure the BlueNRG-MS chip on the board. To test it, I tried connecting BlueNRG GUI to the SensorTile with and without a Nucleo64 board but was unable to establish that connection.Is there a wat to connect the BlueNRG GUI to the BlueNRG-MS chip on the SensorTile ?

Dear ST Community Members,I tried to understand...page 25 ST LISDE12.pdf..................Data are transmitted in byte format (DATA). Each data transfer contains 8 bits. The numberof bytes transferred per transfer is unlimited. Data is transferred with the Most Significant bit(MSb) first. If a receiver can’t receive another complete byte of data until it has performedsome other function, it can hold the clock line, SCL low to force the transmitter into a waitstate. Data transfer only continues when the receiver is ready for another byte and releasesthe data line. If a slave receiver doesn’t acknowledge the slave address (i.e. it is not able toreceive because it is performing some real-time function) the data line must be left HIGH bythe slave. The master can then abort the transfer. A low-to-high transition on the SDA linewhile the SCL line is HIGH is defined as a STOP condition. Each data tra

Hello,I would like to ask a question related to ISM330DLC device. I am using in my application this device using I2C communication between STM32. During review I just realized that I didn't connect the SDX ( pin 2 ) and SCX ( pin 3 ) to VCC or GND ( I have left them unconnected ). If this mistake is critical for functionality of the device and is a must or I can still be able to communicate with the sensor? I plan to use it in the MODE 1 function.Thank you in advanceJacek Pieczaba

We've been successfully using the LIS3DH in its 3x3mm 16 pin package for a couple of years. Works great. But now this product requires gyro sensing too.What we need is a pin and package compatible Acc+Gyro so we can drop it onto the existing PCB and add gyro functionality with a firmware update. ST offers combined Acc+Gyro parts but the layout of the ST website makes it really hard to cross reference by package like this. We found one from Maxim but they've exited the MEMS market; however, this proves that the LIS3DH pinout isn't unique to that part, or even to ST.Does anyone know if ST, or anyone else, offers a pin-compatible part that includes gyro functionality too?Thanks!

Hi guys,Does anyone have a working code for the BME680 interfaced with STM32. I have a code whose gas sensor component is not functional.

HiI am new to this lsm6dsoi am currently using STEVAL-MKI109V3 with STEVAL-MKI191V1 using unico.What i a getting is that "ADAPTER BOARD NOT SUPPORTED" I has also tried Serial Terminal still getting same result with *setdb191v1any help with this?

Posted on September 02, 2017 at 13:08Hello allI have a problem with setting LIS3DH module to detect movement.To be more precise, I want the device to set the INT1 pin down when the it experiences 32mg acceleration change for 0.5 second. Here are my settings:CTRL_REG1 = 0x20 //10Hz, normal power mode, ZXY enableCTRL_REG2 = 0x00 //no HP filtersCTRL_REG3 = 0x40 //IA1 enableCTRL_REG4 = 0x10 //scale 4gCTRL_REG5 = 0x08 //interrupt 1 pin latchedINT1_THS = 0x01 //32mg thresholdINT1_DURATION = 0x05 // 0.5s to activate interruptINT1_CFG = 0x7F  //6D direction mode enabled, all directions enabledNow, when I read  INT1_SRC register it always shows 0x00 and INT1 pin never goes down...Funny thing is that when I set INT1_THS to at least 0x0A it works but it is too much for me!Could soemone help me with this case?

Hello all,In my project, i am working on BLE nrf52832 DK evolution board... and i use LSM6DS3 and do i2c communication with my BLE board...As per datasheet of LSM i had set register for TILT reading Here is the list of register from datasheet :20h into CTRL1_XL3Ch into CTRL10_C20h into TAP_CFG02h into MD1_CFGand i am taking output from INT1 pin...when i initialize i think output should remain low as taking start position and if i tilt device more than 35 degree it sholud show me high pulse for 2 second.... but in my project output remain high all time even in same position...so please help me hoe can i get proper output from ic?do i need any other register to get data from ic?Thanks,Urvisha

Hi everyone, I do not post very often to ask for support but this time I really need help :smiling_face_with_halo: I am working with the VL53L1X (more precisely the Breakout boards which are really great). I successfully managed to get a distance value by using the heavy library provided by ST. Because this library was really huge for my MCU, I have decided to switch to the lite version (detailed in UM2510). However, I am now stuck because I do not get the expected values when I read the VL53L1X registers through I2C (I2C is working because I can get for example the IDENTIFICATION__MODEL_ID adress 0x010F). I tried to look everywhere on The Internet but I can not find the detailed documentation of the VL53L1X registers. So my question is very simple, Where can I find such documentation ? I am sure that with this documentation, I will be able to better understand the issue..Thank you very

Hi, I'm working on enabling single tap detection on LIS2DW12. I found it generates multiple interrupts for one single tap. After I check the signal on oscilloscope in one of the single tap event, the 2 interrupts are seen within 20 ms which I should have 30 ms quiet period set. Can you please check how to configure the sensor properly to avoid this? Thank you.Min-ChingRegister dump:093085 0x0D (OUT_TEMP_L): 0xD0093085 0x0E (OUT_TEMP_H): 0xFF093087 0x0F (WHO_AM_I): 0x44093088 0x20 (CTRL1): 0x74093089 0x21 (CTRL2): 0x04093089 0x22 (CTRL3): 0x18093090 0x23 (CTRL4): 0x40093091 0x24 (CTRL5): 0x00093091 0x25 (CTRL6): 0x04093092 0x26 (TEMP_OUT): 0xFF093093 0x27 (STATUS): 0x21093093 0x28 (OUT_X_L): 0x10093094 0x29 (OUT_X_H): 0x0D093095 0x2A (OUT_Y_L): 0x10093095 0x2B (OUT_Y_H): 0x04093096 0x2C (OUT_Z_L): 0xB0093097 0x2D (OUT_Z_H): 0x3D

Hi, I have created the python script which help me to read the data of wireless vibration sensor consisting of LSM9DS1 which sends the data to wireless modem which is connected with raspberry pi.I want to set the g force parameters which help me to detect the vibration in CNC machines. Earlier I have been working with sample source code but for making it work with python script I need some theoretical help. Will be looking for the suggestions to make this kind of solution work with CNC machines.Wireless Vibration Sensor - https://store.ncd.io/product/industrial-wireless-vibration-and-temperature-sensor/LSM9DS1 - https://githu

I am using LIS2HH12 accelerometer.  In threshold register do I need to write value in terms of g. If I need to set threshold as 0.4 g then how to write .suppose if I want to set +0.4 (or -0.4) , writing 0.4 (float value) in 1 byte is not possible. Any conversion formulae I need use. Please help.

Hello,I need to get position and track the motion of the IMU from the acceleration and other data it gives. I am using a Nucleo STM32F401RE board and a X-Nucleo- IKS01A2 MEMS sensor. I am using the DataLogFusion example in Unicleo-GUI. To get position I am integrating the Linear X, Y, Z acceleration output twice. For even small movements lasting just for I am not able to get even a reasonably ok plot of the motion path of the sensor( for example when moved in a circle on a flat surface , after integrating I get something else). I have observed that there is a general parabolic increase in position which overshadows the actual motion in most cases.A few insights on how to solve this problem and accurately get position from the ST IMU ( LSM6DSL) after Fusion would be of great help to me.

Dear All,I have several questions regarding the absolute maximum acceleration, which the chip (LSM6DS3) can resist. The Datasheet says it is 10000g for 0.2 msMy questions are:* Is there any difference if the chip is powered or unpowered?* What does the value exactly mean? Is it valid for the sum of the accelerations, e.g. if you have 8000 g on X and 8000 g on Y it is above? Or for every axis separate, so you can have a 8000 g on X and 8000 g on Y?* What can be the expected result if the chip is exposed to more than maximum, should it stop returning data or will give incorrect values?* Maximum range is 16 g, I suspect that everything above that will just be returned as 16 g acceleration?It will be very helpful you have and can share this information as the device, on which I work may accidentally fall from height and we it should survive this fall.

Using CubeMX v5.0 and FW_L0_v1.11.0 I'm generating new project from scratch.Project has initialized (using HAL) UART2, I2C1 (on alternate pins PB8, PB9), GPIOs, EXTIs and clock. UART2, I2C1 and EXTI interrupts are enabled and IRQ handlers generated by the CubeMX.On top of that there is X-CUBE-MEMS1 v5.2.1 with IKS01A2 extension and Application IKS01A2-DataLogTerminal. Project is generated for board NUCLEO-L053R8.Just generated project couldn't be build. There is an error inside stm32l0xx_it.c, in function `USART2_IRQHandler()` error: "Undefined reference to huart2".Same problem if this project is built for MDK-ARM v5.CubeMX project file is attached. It's easy to regenerate the project.I've tried to manually add #include or something in a hope that huart2 would become visible, but this BSP+MEMS1 Application seems like overcomplicated non-modular intertwined firmware. It's too hard to understand.Please

Hi,I would like to generate interrupt on INT1 when I turn the lis3dh upside down and I am a bit lost how to do that. (DATA_RATE at 1Hz.)I am playing with the registers based on datasheet but there is not enough explanatory information for my knowledge to be confident at what i need to do.Can someone point me in the right direction?Thanks.

Hello there,I have a device called RuuviTag that includes your LIS2DH12 accelerometer and that can be programmed by means of an IDE called Espruino in JavaScript.For a project, I am trying to get the tilt angle of the device measured in degrees with a value between 0 and 360. At the moment, however, I'm not succeeding and looking on the internet I found this documentation:https://www.st.com/content/ccc/resource/technical/document/application_note/d2/d6/22/4f/b9/8f/45/59/DM00119046.pdf/files/DM00119046.pdf/jcr:content/translations/en.DM00119046.pdfDo you have any code to which I can get information for this problem? I tried to use equation 2 but it doesn't give me back the angle. I also tried equation 6 but

This is the equation i am trying to use. Please let me know if there is something wrong. I am able to verify pitch and roll variations correctly.roll= atan(accData.fy/accData.fz);pitch= atan(-accData.fx/accData.fz);cosRoll = cos(roll);sinRoll = sin(roll);cosPitch = cos(pitch);sinPitch = sin(pitch);Xh = (magData.fx)*cosPitch + (magData.fy*sinPitch*sinRoll) + (magData.fz*sinPitch*cosRoll);Yh = (magData.fz)*sinRoll - (magData.fy)*cosRoll;magHeading = atan2(Yh, Xh); We will have to mount this on a metal structure, How can i compensate for soft iron.Please find the attachment for sensor orientation.