MEMS and sensors

Hi，I would like to know the meaning of each data in the L4CX calibration data(VL53LX_CalibrationData_t in API）, because there is a lot of data for this IC, and I would like to confirm the status of the calibration from the data.Thank you.

Hello everybody,I have connected a SATEL-VL53L8 board to my ESP32, and I am trying to run the basic ranging example, using ULD driver. When I run the example, I get VL53L8CX ULD Loading failed in the serial terminal. Trying to figure out what's wrong, I have connected a logic analyzer to the SPI bus, so here is what I know so far:The vl53l8cx_is_alive() function gets a proper response from the chip (0xF0, 0x0C), indicating that the hardware is connected properly, and the SPI bus communication works as expected: The function vl53l8cx_init goes on, and the firmware image is downloaded in 3 pieces (32K + 32K + 20K). There is a piece of code (lines 335-342) that checks if the FW is correctly downloaded. There is a single read command, and the value read from 0x7FFF is 0x00, and I'm not sure whether this could be an indication of the success status.  /* Check if FW correctly downloaded */status |= WrByte(&(p_dev->platform), 0x7fff, 0x01);status |= WrByte

I am experimenting with the VL53L5/VL53L8 sensors. For multi-target there are the options of target order of strongest and nearest. This is not a difficult concept. However, I am curious about the algorithm for detecting the peaks in the histogram. I assume there must be some thresholding, so small peaks caused by noise(?) are ignored. I can't see a way to set the threshold, however I see this being difficult, better different thresholds work for different ambient light levels, light noise levels etc... After some quick experiments, I haven't seen any problems. Using nearest rather than strongest target order, may be more sensitive to noise conditions. Any thoughts?

My question is, using Algobuilder (or mems studio) and unicleo, can i use for example two accelerometers (on hardware nucleo 401RE, x-nucleo ISK01A3 and steval MKI233) and get data from them simultaneously to reduce the measurement error/noise?Whats the best option for this to be made?Thanks in advance

I'm currently trying to stabilize the MotionFx Sensorfusion in an environment with medium magnetic disturbances. However I don't quite understand the three parameters ATime, MTime and FrTime from the Knobs structure. For example the manual UM2220 describes the values in a range from 0 to 1 but the default value in the startup seems to be 1.5f for the the MTime Parameter.So from UM2220 I deduct that MTime and FrTime should be at a high value near 1 (e.g. 0.95f), but I don't experience a major change setting those parameters accordringly. So what is the correct range for the parameters and how do I set them, if I want my transfer function to be stable against low magnetic disturbances? Thanks in advance! I'm using version 2.7.1 btw.Moritz

Hi everyone, I've had many many issues with the board and now it looks like it's broken. I can't turn it on, but let's start from the beginning.I've got the STEVAL-MKSBOX1V1 (SensorTile.box) with a blue plastic cover.Now, I've tested some simple functionalities from the Entry and Expert level (using ST BLE Sensor Android App) and there are already a few issues I hope I'll get some help with:Power button doesn't always work. Turning off or on - Sometimes I have to reconnect it to the battery so it resets.Logging very often automatically stops after a short period of time - I think it happens when the .csv file weight reaches 749kB, but I'm not 100% sure. I just noticed that when that happens, one of the files (and it's always that weights the most) is 749kB.Log files that you can delete or export using the app are not stored in SD card - where are they stored exactly?Log files are sometimes not created at all, like I didn't even start logging.Output to SD card Buffer 10000 setting makes

Привіт! У мене проблема з отриманням даних із датчика LSM6DS3. Коли я намагаюся прочитати значення реєстру "WHO_AM_I", я отримую надто короткі імпульси у відповідь, які не можуть бути прочитані поданими до його тактового сигналу.Я використовую цю плату з сенсором. SPI. Головним є STM32F411.3v3 -> 3,3 ВGND -> GNDSA0 -> PA6 -> SPI1_MISOCS -> PA4 -> GPIOA4 SDA -> PA7 ->  SPI1_MOSISCL -> PA5 ->  SPI1_SCKУ випадку, коли я надсилаю значення 0x8F, я отримую результат, як показано нижче. У той же час я повинен отримати значення 0x69 або 01101001 у двійковому вигляді. І якщо ви важливо подивіться на результати нижче, ви побачите, ніби щось заважає, імпульс занадто короткі, щоб їх можна було записати.Я намагався прочитати значення в інших реєстрах "CTRL9_XL" і там така ситуація. Я повинен отримати 00111000, але я отримав 00110000, ніби імпульси не були стиснуті та записані на одне значення менше:Налаштування SPI:void SpiConfig(void){ RCC->APB2ENR |

I will be testing out the VL53L8CX_NB, perhaps next week. I notice it has a setting for the number of targets detected per zone. My plan is to have 8x8 setting, so 64 zones. I note the firmware has setting of 1 target per zone. The current setting is strongest target order. My plan is to set the target order to nearest and the target number to 2. Will there be sufficient memory RAM for this? With regards to RAM does this mean the host controller, or the TOF sensor device. If the issue is at the host controller end, it should be easier to resolve. I am hoping just changing this parameter to 2, will be sufficient, for accessing data with regards to 2 targets.

hello, I'm using a vl53l1cb satel board, but I'm not been able to get a reading greater than 4m (aprox).I'm using the vl53l1 zephyr RTOS driver, and I'm aware that the roi selection is different than the one of the UM2133, so I'm not selecting a specific roi, but still the maximun distance reported by the sensor is 4. Do you guys have any suggestion on how to be able to get the maximun distance reading using the zephyr driver?

Hello,We want to do an experiment for smoke detection with ST's ToF technology. We are using the following STM products:    - VL53L8CH    - x-Nucleo-53l7a1     - STSW-IMG043The GUI has so many configurations and it provides raw data and algorithm output data. We are interested in raw data and we want to know which configuration affects the row data. I mean in the same environment, will the sensor raw data change if we change the configuration?What is the effect of ambient light on the sensor's raw outputs? Thank you!

I'm working with a nucleo 401RE and a x-nucleo ISK 01A3 as hardware and algobuilder and unicleo-GUI as software. If I measure, for example, the rotation vector 9X throughout the day and save the output datalog using Unicleo-GUI, the timestamp shows that every hour and a quarter taking values, there is no data until hour and a half later, also the last timestamp shows that around 48h of data, so there is no data loss, just some weird cyclic jump error on the timestamp.This error doesnt show up on Unicleo-GUI's user messages, just on the .csv timestamp generated.How can i overcome this issue?Any help is appreciated, thanks

HiI am trying to configure the accelerometer sensor to read the data polling  as the example suggested in githubWhen I try to read /* Read output only if new value is available */lis2dw12_flag_data_ready_get(&dev_ctx, &reg);At initial the drdy will be high after that I am reading the lis2dw12_acceleration_raw_get(&dev_ctx, data_raw_acceleration);  once reading this register the drdy value must be 0 but it is high and its reading this continuously.is there any register I have to check and we have placed this sensor with different MCU and I am new to STM community.Thanks,

Hello,I am trying to do some ray tracing simulation for your VL53L8CH in a specific environment. I was wondering if you have any data beyond the "Field of Illumination" diagram for your VCSEL emitter (I assume you make your own emitters in-house). An "IESNA TM25" or "SPEOS" ray file would be amazing, but even just a maximum output power in lumens, watts, candelas, etc. would be helpful. That way I can at least know what the percentages in the "Field of Illumination" diagram mean. Also, if you have any detailed CAD on your chip that would allow me to place the emitter in the correct location on the sensor, that would be helpful as well. I have recreated it from your datasheet, but that doesn't have details on how deep the VCSEL is or what shape it is.Thanks,Garrett

Hi Everybody, I am a beginner and I need some information to start using the following devices:- Nucleo-F401RE- X-Nucleo-Amicam1- Steval-mic007v1. I have currently downloaded the following material:- X-cube-memsmic1- Link007- Link009- Stm32cubeid.Is it necessary to install additional software tools and/or embedded software? Is it possible to get an initialization procedure or a video guide for the correct configuration of the devices for the use of the Steval-mic007v1 microphones? Thanks for your help. Best wishes, Oscar 

 I now want to use the spi port of the stm32F407 series to collect data from the PDM microphone of mp34dt05. My SPI is set to the main device to only receive. There are SCK and MISO ports. The SCK clock is 2.25Mhz. MISO receives data, but I found that I collected The pdm data flow basically caused no changes based on my environment changes. I felt like I had no real purpose. Can you tell me in detail the correct driver for the mp34dt05 microphone chip on spi? Is there a driver file for the mp34dt05 microphone chip? If so, can you send it to me? Thank you for your attention.

Hi,I'm attempting to use an LSM303agr magnetometer and calibrate it using the MotionMC library.My issue is that the MotionMC MMC_Output_t struct always remains at its default value.I've tried different hardware setups:STM32F746VG and a custom boardNUCLEO-F401Re with a STEVAL-MK117V1I followed the application note UM2192Here are the steps I've taken: https://www.st.com/content/ccc/resource/technical/document/user_manual/group0/dc/4f/b0/4d/e3/41/4f/4b/DM00382798/files/DM00382798.pdf/jcr:content/translations/en.DM00382798.pdf 1-Enabled CRC in Cube MX. 2-Configured MotionMC in the software Pack and enabled it in the Middleware panel of Cube MX. 3-Configured the I2C to communicate with the LSM303agr. 4-At the beginning of the main code, I set up the magnetometer like this:     /* @brief configure the contol register of the magnetometer @param lsm303agr : pointer to the struct associate to the device to read @retval status of the execution

I used in the past lis2mdl. I need to reproduce the former product. I ordered the same parts but I faced an issue with the magnetometer. The part number is the same but i got different power consumption. I got an image with the different magnetometers (old and new with same product number ) and i found out that they have different markings. Are there any different versions of lis2mdl with different power consumption?

Hello, currently I am using LSM6DSR for developing my apps.I have tested this sensor for Wake Up detection with 218.75 mg threshold and Activity detection with 15.625 mg threshold without any issues.Is it possible to enable both of these detection at the same time (say Wake Up detection as interrupt 1 and Activity detection as interrupt 2)? I doubt it is possible since both of these are using the same WAKE_UP_THS register.

Hello,   I'm trying to use the VD6283 sensor on a X-NUCLEO-6283A1 plugged in a Nucleo-64 STM32F401.   For this, I've installed the latest ST-Link drivers and the software STSW-IMG301. My board is well recognized on Windows device manager as a "STM STLink Virtual COM Port", but when I try to launch the VD6283_GUI application, I've the following error : "SensorSystem..ctor():Le format de la chaîne d'entrée est incorrect" / "SensorSystem..ctor():Input string is not in correct format".   I've tried to launch it also with admin privileges but it's still not working.   Application version : 1.0.0 - r862 Windows : 11 Pro   Thanks

Hi,We are using an LSM6DSOX IMU and Micron MT29F2G01ABBGDWB Nand Flash on a common SPI bus. We didn't see any issue until we upgraded the LSM6DSOX with an LSM6DSO32. The datasheet suggests that they are drop-in replaceable. Both the flash chip and IMU share a common power supply. The issue is that once we turn the power off, either on a Flash-at-capacity event or to conserve power, the data on the Flash chip gets corrupted. This is somewhat bizarre as it is only happening with the LSM6DSO32 sensor, and not on LSM6DSOX.Has anyone seen anything like that? Are there operational differences between the two sensors that we are missing? Any advice on troubleshooting this will also be appreciated. The schematic for IMU and Flash is attached.Thanks

GreetingsI have been using the LIS2DW12 accelerometer for some time now, and have tried to set up the self-test functionality. Ironically, I've set it up according to the AN5038 app note pg.46 and it has never failed the self test. I am also analysing the averages obtained before and after the self test, and the calculated differences are always within the range specified in the datasheet. I believe I can expect it to fail if I move the sensor during the period I expect the self-test to be running. I've tried this to no avail, where the self-test will still pass. The criteria and simulation for a failure is important as it will directly determine if my device using the IC, is ready to be used. Please may I be advised on any other methods to get the self-test to fail, or if it is plausible that I impose a tighter range on the min and max values that the calculated difference should fall in between.Any help would be appreciated. @Federica Bossi 

Hello, i want to use the VL53L1X, or equal TOF sensor in humid and pressurised environments. First Prototypen are potted into Epoxyd-Resin.  I also want to try parylene coating, because of hydrophob surface.  For that reason I want to ask, if anyone has done this case succesfully, or wich hydrophob potting material is preffered?  Maybe there is already a easier solution on the market for optical measurements in humid enviroment?    Many thanks in advance,    MIKE    

Hi.I'm having difficulties understanding how to configure the LIS2DE12. Especially the filter part is obscure to me.I want the accelerometer to generate an interrupt when the device changes from being still to moving or the opposite.The power consumption should be as low as possible, so an ODR of 1hz has been chosen, and also smaller movement should be filtered out. That means the device should have been moving for at least 5 minutes after having being still or vice versa before generating an interrupt.I hope someone is able to help.Thanks.

Hello.I am a graduate student who is conducting research using IIS2MDC and Arduino, a digital magnetic sensor of STMicroelectronics.I am currently using IIS2MDC and Arduino Uno to measure the magnetic fields in the form of sine waves generated from the coil.First of all, the measurement environment is composed as shown in the picture below. The code used the stm32duino/IIS2MDC/IIS2MDC_DataLog_Terminal.ino code listed on Github. I am proceeding with the measurement by modifying the Baud rate and Delay time.The picture below shows the magnetic field measurements of the coil for AC 20 Hz current at Baud rate (2000000), Delay time(0). The questions I would like to ask are as follows.1. I need to connect the cs pin to the Arduino Digital 0 pin for data to come in, what is the meaning of this connection? Also, I'm using the drdy pin without connecting it, and I'm curious about the meaning of these two pins. 2. When I set the sensor ODR to 100Hz and looked at the magnetic field

I am using the IMG403 EVK GUI to test and validate the module VL53L7CH in a product. I am facing a few issues in the GUI. While trying to plot the histogram in "Zone 8x8" mode, I am getting an error. Similarly, if I change the configuration "MZ-AI Configuration" settings spreadsheet, again I am getting another error. I can be able to just run the preset configuration but can't be able to modify the parameters. My aim to test the module with all possible configurations. Kindly help me on this issue.