MEMS (sensors)

Hi everyone,I have been stuck at a problem. Initially i tryied to upgrade the firmware on SensorTile.box through the ST BLE Sensor App with some demos without any problems.Once i tryied to upgrade the BLEFOTA_BL_1.0.0.bin file through the app, so, without any modification of the firmware, and the SensorTile.box seems to not work. In particular it isn't sensed by the USB connector and by the Bluetooth, so i can't upgrade the firmware yto make it working again. What can i do in order to reset it in some way?Thanks

Hi, I am working on a MEMS LIS3DSH connected via SPI to a STM32F207ZG having the following configuration:Full scale: 2gOperating mode: 100HzFilter: 800HzRegisters:CTRL_REG3: 0x48 (Interrupt pulsed, active high)CTRL_REG4: 0x6F (BDU enabled, XYZ enabled, 100Hz)CTRL_REG5: 0x00 (BW 800Hz, FS=2g)State machine:Registers:CTRL_REG1: 0x01 (State machine 1 enabled)MASK_1A and MASK_1B : 0xFC (Axes X,Y and Z enabled as input for state machine)TIM1_1 = 0x000ATIM2_1 = 0x0010THRS1_1: 0x55SETT1: 0x81 (peak detection enabled)The state machine is working as expected, after a motion the OUTW command is setting in

Hello to everybody,I bought the bluecoin evaluation kit and I'm interested in logging audio data in SD, similarly to the Audio_SD example.I have tried the Demo, downloading the .bin using the SWD cable from the nucleo board. Then removed the CoreSystem from the CoinStation and put it on the Cradle.This is find for the final applications. However, I was wondering if there is a way to debug the application not just downloading the .bin using Stlink.Ok I can use the SWD cable but I have to put to CoreSystem on the Cradle and doing that I cannot debug the writing on the SD card.Is there a solution to the debug the whole application (SD included) ?Thanks.

Its quite stressful to see the sensor box not working. It hangs with demo apps. It tried to connect repeatedly while plotting data when it was working. Have used it only for a day. After firmware update, it does not respond. Blue LED does not blink at all. You have to disconnect from battery every time. You could have bundled a debugger with this device to see if the LEDs light up. Have I received a defective sensor. I want to ask for replacement. Have paid lot of money for shipping and customs duty tax

Hi, In our system there's an LSM6DSL accelerometer and LPS22HH barometer connected to the same SPI bus.When nCS of the accelerometer is asserted (0), the nCS of the barometer is de-asserted (1) and vice versa.HOWEVER, as nCS=1 (for both sensors) also means that the components works in I2C mode, the following condition occurs (as an example):nCS_Acc = 0, nCS_Baro = 1 : an attempt to communicate with the accelerometerMCU (STM32F412) communicates over SPI - it drives MOSI & SCLK with the relevant acceleromter commandConcurrently to the accelerometer, the barometer which is now in I2C mode, receives the MOSI & SCLK signals on its SDA & SCL linesThe accelerometer responds as expected on SDO towards the MCU MISONow, if the barometer interpret the SPI communication to its peer as a valid I2C address byte it ACK on the SDA line, (which is shared with MOSI) and make a bus contention and m

Hello!I am using two VL53L1X Time of Flight sensors and the setup is working fine - I am getting measurements from both sensors after successfully changing their I2C addresses.So far so good.What is interesting, however, is when the two sensors face each other! I put them at a distance of 50mm from each other and then plotted the measured distances over the timestamps. The measurements show very interesting disturbances! As if the sensors are "ping-pong"-ing each other. Their measured values jump sometimes to 6000+ mm! (See attached pdf)An array of sensors will be mounted on two individual RC-cars to achieve collision avoidance over the entire radius of the car. It might happen so that two sensors influence each other when they come in sight of each other.Can you please suggest a way to mitigate this effect?Thank you!Mihail

Hi there,I was working on the LIS2DH for one of our applications, and found that there are some details missing in the datasheet (Doc ID 022516 Rev 1), enlisted below:1- The bits HPCF2 - HPCF1 in the CTRL_REG2 (21h) corresponding to the high pass filter cut off frequency selection do not have any details mentioned about how they affect the cut-off frequency.2- The REFERENCE/DATACAPTURE (26h) also does not have any details about it mentioned in the datasheet, except that it acts as the reference for the HPF. What does the "Data Capture" here represent?3- Also, there is no information about the various bits of the FIFO_SRC_REG (2Fh).It would be really appreciable if you could share details on the functionality of these bits/registers.Looking forward to hearing back from soon.Warm regards,Sarthak Malik.

I am exploring the SensorTile (STEVAL-STLKT01V1) and would like to capture Audio recordings on a Unix OS (namely Raspbian). I have looked through the documentation here and the option to save audio to SD card is not ideal for my application, neither is reading from Windows.I have gotten the AudioLoop demo software to run and capture sound on Windows, but was wondering if there is any documentation or clues as to how to get it set up on Raspbian? The SensorTile is currently not getting recognized as a USB device in Raspbian, and before starting to hack away on my own I thought I'd ask

Hello,I am using a PNUCLEO VL6180X and I would like to drive my LED from the GPIO1 interrupt output only this output as shown in the diagrams above is always at 1 and it goes to 0 only for a few nanoseconds; I would like to have an interrupt signal only when I bring my hand closer to the sensor, I would like it to send a 1 to the LED when there is a target and a 0 when there is nothing.Here are some images on the oscilloscope with the target and without the target

Hi Team,Dear TeamGone through the user manual, refer the below linkhttps://www.st.com/content/ccc/resource/technical/document/user_manual/group0/b9/d0/7c/c5/a8/55/4c/bc/DM00337036/files/DM00337036.pdf/jcr:content/translations/en.DM00337036.pdfAlso find the below part usedMCU : STM32F446REAccele

Hi, my name is Vincenzo. I am working with the ToF VL53L3CX. Lately I wrote some applications to make 6 sensors work. At first I thought that the applications were working well, but now I realized that if I set too high timing budgets I had a performance problem. Since when I work with only one sensor everything works correctly, I thought the problem was in the way I manage the 6 ToF.For this reason, I was wondering if there was a project made by you where multiple sensors are managed.Thank you in advance for your support.Vincenzo

Hi everybody , I am not sure about am I writing to the true title but anyways I am asking. I am trying to read data from LSM9DS1 sparkfun IMU sensor using HAL i2c with STM32F4 discovery board. I was succesful and I was getting datas, then something happened and my board start not working.I am not changing the code but it sometimes work sometimes don't. I try to just read device's adress with the code below to be sure problem is not about code. There is same problem for that code to (code is sometimes working sometimes don't). I am trying to erase device memory with utilty occasionaly. 65% of time it erase device memory but other times it gives "device couldn't find " error.What could this problem be caused bye? I changed jumpers and STM's cabel but problem is still same.Adress finding code : for(Adress=0; Adress<256; Adress++) {  if(HAL_I2C_IsDeviceReady(&hi2c1, Adress, 1

Hi, our customer is in search for a economical solution for a gadget posistion sensor, that senses 2 positions: the gadget is in standing or in laying positions. What can we suggest?

Hi,I have a MCU connected to a LSM6DSM using I2C with 1k pullups. I measured the average current consumption with the MCU and the LSM6DSM powered up but with the I2C lines physically disconnected. The current consumption was around 20uA.Once I connected the I2C lines and measured the current consumption, it increased to 60uA. The LSM6DSM was not initialized at any point of time when I measured the current, so it's state would have been the same in both the scenarios.What could cause this 40uA current draw? Is this to be expected?Thanks

I am using LIS2DH in I2C mode. After power cycle, the IC consumes almost 100-120 uA. Upon removing the IC current drops to 30 uA so clearly it is the IC that is consuming the power.After startup, I am resetting the IC, blocking the data (0x80 in REG 0x2E) and rebooting memory content (0x80 in REG 0x2F). But still there isnt any change.I noticed, every time fifo is getting filled up to 32 values, though it has not been configured to collect data and FIFO is disabled Please advise/

Hi,I'm trying to use multiple VL53L1X sensors to detect objects. I successfully interfaced them with a Raspberry Pi 4B, and tried to tune a bunch of parameters to get good detection.When the sensors point to an object, within the sensor range (0.4 - 4.0 m), the detection is quite accurate, with small fluctuations in the detection (2 - 4 cm). However, I'm facing a problem when operating in strong ambient light environments, and especially when the sensor is pointing to the infinite (i.e the object is farther than 4.0 m). The detection here is really unstable, and vary a lot (sometimes 1m difference between two ranges). That makes it really hard to exploit.I tried different distance modes, especially the short distance mode, which should be the less sensible to the ambient light, according to the documentation. However, I can still observe instabilities. Then I tried to set a different Timing Budget value, and set it to 20 ms, 33 ms, 100 ms, without

Hi Team.We are using LSM9DS1 with MCU (S32K146) via I2C. We have tried enabling the acc and gyro with CTRL_REG1_G and CTRL_REG6_XL .We can able to read the Who am I register properly. But the data output registers of acc/gyro are giving different values even if the board is in rest condition.Please provide an reference LSM9DS1 example code for the necessary configuration and calculations.

Temperature absolute accuracy. This parameter was not found in the datasheet.Of the 15 sensors tested, the temperature ​difference was 5 degrees.What ​temperature absolute accuracy should be?

Hello everybody,I tried to install the GUI en.STSW-IMG004 to run my EvalBoard with VL53L1x. But the insatllation end with Error Massage 1721 (see attached). I ried it also on a second Hardware with the same result. What did I make wrong? Regards Daniel

My MCU initialisation code looks like this:GPIO_InitTypeDef gpio = { .Pin = 0, .Mode = GPIO_MODE_OUTPUT_PP, .Pull = GPIO_NOPULL, .Speed = GPIO_SPEED_HIGH, .Alternate = 0 }; GPIO_InitTypeDef gpio_spi = { .Pin = GPIO_PIN_12 | GPIO_PIN_13 | GPIO_PIN_14, .Mode = GPIO_MODE_AF_PP, .Pull = GPIO_NOPULL, .Speed = GPIO_SPEED_HIGH, .Alternate = GPIO_AF5_SPI4 };   if(true) { /* gpio and spi */ __GPIOE_CLK_ENABLE(); gpio.Pin = SS_pin; HAL_GPIO_Init(SS_port, &gpio); gpio.Pin = VDD_pin; HAL_GPIO_Init(VDD_port, &gpio); gpio.Pin = RST_pin; HAL_GPIO_Init(RST_port, &gpio);   VDD(true); SS(true);   if(true) { /* put the FXOS8700 chip into SPI mode */ delay_ms(10); RST(true); delay_ms(1); RST(false); delay_ms(1); }   /* spi */ spi4.Instance = SPI4; spi4.Init.Mode = SPI_MODE_MASTER; spi4.Init.Direction = SPI_DIRECTION_2LINES; spi4.Init.DataSize = SPI_DATASIZE_8BIT; spi4.Init.CLKPolarity = SPI_POLARITY_LOW; /* SPI_POLARITY_LOW for mode

Hi,I am exploring two newly purchased units of B-L475E-IOT01A boards with STM32L475VG MCU interfaces used by each sensors. Currently using STM32CubeIDE software for my beginner's coding mini assignment.The first unit of B-L475E-IOT01A board is returning the temperature reading well to the STM32CubeIDE console panel. However, on the other board with the same code, the temperature sensor reading on the console is "nan". (both console reading captures below)Is my other B-L475E-IOT01A board temperature sensor HTS221 faulty?I have checked both B-L475E-IOT01A boards jumpers are identical.Please advice what could be wrong for the board sensor and alternate methods to verify its temp sensor functionality for Board No.1 ? :sad_but_relieved_face: Board No.1 - console panel capture

I just received my order for an STEVAL-BCN0021V1B kit.I installed a new and properly working CR2032 battery in the STEVAL-BCN002V1 board. I have checked for correct voltage at the VDD and GND test pointsI have installed the ST BLE SENSOR app on both an iPhone and on Android phone. The iOS version 4.6.4 while the Android version is 4.7.2How do i see or read the values of the sensors on the STEVAL-BCN002V1 boardI am able to see a list of bluetooth devices when I use OPEN BLE TOOLBOX icon. What is the name used by the STEVAL-BCN002V1 board? I cannot see the board in the list. I have the board literally sitting on the iOS and Android devicesI have also checked for Bluetooth devices on the phones Bluetooth devices identification list and I do not see the STEVAL-BCN002V1 board or sensors for that matterAny pointers will be greatly appreciated

We have devices marked 8198 and 7298, we are thinking these may be date codes and no the component part number code.

Hello, I want to buy a SPAD sensor to obtain 3D point cloud data.​ I find VL53L1X sensor which actives 16x16 SPADs, and I guess it can support 16x16 spatial resolution of depth map. Am I right?And I also find the evaluation board, X-NUCLEO-53L1A1, and I think it can connect the three VL53L1X. Then, can I get 48x16 spatial resolution of depth map by using those three VL53L1X sensors?Thank you.

https://www.fpaynter.com/2020/10/left-side-wall-tracking-success-with-vl53l0x-array/I have three VL53L0X sensors mounted in a linear array on a wheeled robot, pointing broadside to the direction of travel. In a recent test where the robot moved slowly away from a wall, two of the three (front and rear) sensors report reasonable increasing values, but the center distance measurement increased very slowly and then started to decrease as shown in the following Excel plotHere's a link to a