MEMS (sensors)

Hello,We are currently in the process of developing a device that contains the STHS34PF80 IR sensor. After study of the datasheet and conducting our own tests, we have found that the sensor reliably detects a person within a 4-meter range. However, for our project requirements, we need an extended detection range of 10 meters.We understand that one way to achieve this goal is to use appropriate lenses to enhance the sensor's capabilities. We would greatly appreciate your recommendations on which lenses would be suitable for extending the range of the STHS34PF80 sensor to meet our specific needs.

Hello everyone,after some time that I use the sensor, it gives me back a temperature value of 0 °C.I'm using a library taken from github that I adapted to work with the STM32F407 microcontroller (can't post the link).The sensor works well but sometimes (not always) it "fails" and gives me back the value 0 °C. To "fix" it I have to reboot the whole system. Can anyone give me an explanation? Why is this happening?I use STM32F407 microcontroller.Thank you.

I'm currently using STEVAL-MKI231KA kit connected to STEVAL-MKIGIBV5 which is plugged into a standard DIL24 socket of STEVAL-MKI109V3. I'm trying to use the STHS34PF80 sensor but every time I get the following error: The WHO_AM_I register value does not match the device selected. I have also tried upgrading the firmware in MKI109V3 board but still no change in the error.Details related to connection are as follows:Jumper J7, J13, J14 are shorted on STEVAL-MKI109V3.Unico version = 9.16.0.0Firmware Version =  V3.58.2 

Hi,I am using the LSM6DSO32X(in STEVAL-MKI197V1) sensor on the STEVAL-MKI109V3 board.There is no external sensor.I see and follow the Datasheet, but the Gyro Data does not come out and the external sensor value comes out.I used Easy Configuration in the Unico GUI.No matter how shaking, it doesn't come out.What is this problem? 

Hello everyone,I am an engineer at an EMS, and one of our clients has reported an issue related to the use of the HTS221TR sensor. Our client has observed that some of their boards, on which this sensor is mounted, have been exposed to projections of a product (specifically, wine) during their usage, resulting in inaccurate measurements.Our boards are coated to prevent any degradation during their use, with the exception of the HTS221TR sensor.I would like to seek your expertise on two points:Impact of contact with wine on the sensor: Can contact with wine be considered potentially destructive for the HTS221TR sensor?Possibility of cleaning the sensor: In the event of exposure to wine, is there a recommended procedure for cleaning the sensor? If yes, could you advise on suitable cleaning products for this operation? Thank you in advance for your help and suggestions. Best regards, 

Hi Team,I would like to know the input capacitance for the pins (specifically for I2C pins) of the ASM330LHH IMU sensor. 

Hello,I would like to increase the sample rate of a SparkFun LSM6DSO which is controlled by the ESP32 Thing Plus C microcontroller (I am using the Arduino IDE and said libraries).I tried using the function LSM6DSO::setAccelDataRate() and LSM6DSO::setGyroDataRate(), to no avail. I cannot get faster than 110-140 Hz.I've been reading the sensor documentation and data sheet, and I have no unnecessary time delays or print statements in my loop. What can I do to sample quicker?Thank you!

Hi all, Is there any difference between LSM6DSV16x and LSM6DSV16xTR except the packaging?Thanks in advance.

Hi, is the sensitivity in the datasheet (-38 dBV +-1) normalized to 1 Pa (e.g. -38 dB re 1V/Pa)?

I saw there are self test related code in the driver.What's the purpose of self test and when do we need to do self test? Thanks,

Can several STHS34PF80 IR sensors be used simultaneously, when placed not far from each other, say on the same PCB? If STHS34PF80 infrared sensors are completely passive devices, there should not be any limitations of the distance between them, even if their fields of view are intersecting, right? 

Hello, i have searched for this information, but couldnt find it anywhere. Whats the unit of the measured of the MEMS IMP23ABSU mic? I have used the STEVAL-STWINKT1B with the FP-SNS-DATALOG1 from which i created several .csv files that i now need to analyse. I have exported the values as "raw values" (which is an option you can choose when running the script of the dataloger).So far i have checked the DeviceConfig.json from the dataloger and found out that the unit is  "unit": "Waveform". Does that mean the values, measured from the microphone, are in Pa or dB?You can find part of my DeviceConfig.json below.

Hello!I've working with AMICAM1 module together with STM32L476RG. By default in example 16 bit resolution is used. AD1974 that used in AMICAM1 has possibility to measure with 24 bit resolution. I tried to extend the buffers and config 24 or even 32 bits ti the SAI, USB descriptiod and AMICAM configuration but nothing helps. Could anyone support please how to reconfigure the project correctly? 

Hello everyone. I'm working on a vibration sensor with RMS velocity output based on measurements from an accelerometer with +-16g maximum acceleration range. There is a simple equation for calculation RMS velocity range and that is : VRMS=Apeak/2*pi*f*sqrt(2). Apeak would be 16g. The bandwidth that i want to cover is 10...1000Hz. So the RMS velocity would be variable based on frequency range. Now i want to know that what would be the maximum RMS velocity in mm/s for this range of frequency and +16g? As it seen from above equation it should be something like 17.658mm/s, but i have a vibration sensor from PCH company as my reference and they declared in their datasheet that their maximum acceleration range is +-18g and at the same time they declared this device can measure maximum 100mm/s RMS velocity in 10...1000Hz frequency range. I'm pretty confused about these two issues. I really appreciate if anyone can describe some useful hints about the issue. Thank you.

Does anyone know if the LIS2DH12 is ok in a molded application? We have one where we are putting it in a device completely encased in low-pressure molded rubber. The issue we are seeing is that at power up, sometimes the sensor doesn't power up properly and draws a significant amount of current (up to 1.2mA). Re-power it and works fine. If they power up correctly, they work great. If they don't then the unit will never wake from sleep. The sensor is programmed to generate an interrupt on movement. The biggest issue is that as soon as we cut back the rubber, it is very difficult to get them to fail. Temperature during molding is about 165 degrees F, so heat shouldn't be an issue. Material is not conductive, so should be no issues there. Looking for ideas. One thought someone had was that material shrinkage while cooling was causing issues with the sensor. 

I am currently working with a STEVAL-MKI109v3 evaluation card and a STEVAL-MKI217v1 module. I am using UNICO-GUI to collect data from the module, and then processing the data in Python using various filters such as Madgwick, Kalman, and Mahony to enhance accuracy.My goal is to calculate horizontal distances in centimeters based on the data collected. I have written Python code for this purpose, but the results are not accurate. For example, when I measure a jump of 91 cm, my calculated result is 90 cm. Similarly, for a 54 cm jump, I get 46 cm. Interestingly, some values yield good results, while others produce excessive results. For instance, for a 77 cm jump, the calculated distance is 112 cm.It's worth noting that I have manually measured these jumps before testing my prototype.this pic is showing a jump for 66 cm but the result as you see show 104 cm I am wondering if it is possible to accurately calculate horizontal distances using the STEV

Dear Sir or Madam,I'd like to know the part number of MEMS sensors in STmicro from the marking on the chip.How to know the marking "8209/C3H/?BW JZ" ?

I am using lsm6dso32x.An5629 Datasheet Section 8 FSM Configuration Example implemented only Accelerometer.I don't understand.It seems that you did not set what data(gyro or accel) you use with FSM, but I don't understand how it was used as an Accelerometer.How do I use it as a gyroscope?Also, Can you tell me specifically how to create the Threshold? I don't quite understand.Thank you

Hi, We are using STEVAL-STWINKT1B board with a BlueNRG-M2SA BLE module.We want to change the physical layer of the Bluetooth module to utilize bandwidth diversity. But we couldn't figure out how to do this.we have seen "hci_le_set_phy" command in one of posts but we are unable to find that command in latest x-cube-ble2. Is there a way to do it?Thanks.

Hi, Please provide park date code clarification of "D231". Part Code:LPS22HHTR Thanks, Arun

I have a custom setup which contains a microcontroller STM32L412RB and a LSM6DSV.I tried READ the WHO_AM_I register (thanks for implementing that) using the driver LSM6DSV(https://github.com/STMicroelectronics/lsm6dsv-pid).Yet, I get back a 0x0 and not desired value. I need to observe the signals in oscilloscope, that transmission is happening properly. I also need to get the data from Accelerometer and Gyroscope registers.   Can anyone help me through this..?

I used the lsm6dso32x_read_data_polling example and got the same result as above.(with SPI)Is this the correct value?And when I checked the values ​​using Unico GUI tool, I got the same values ​​as above.Although the values ​​are similar to the example, they are slightly different. So I'm a little confused. Is this okay?Thank you.

Hi, I am working with the lsm303agr e-compass. I am stuck with the hard iron callibration. I I wrote two functions fuctions for calculating the heading: I was trying to follow the https://gist.github.com/srlm-io/fafee8feed8bd5661266#file-hardironcalibration-ino but i am still stuck. (I am working in C) void HardIronCompensation(void) {HAL_StatusTypeDef ret;//min en max calculatingint16_t Magn_Xvalue = Magn_X();if (Magn_Xvalue < Xmin) {Xmin = Magn_Xvalue;}if (Magn_Xvalue > Xmax) {Xmax = Magn_Xvalue;}int16_t Magn_Yvalue = Magn_Y();if (Magn_Yvalue < Ymin) {Ymin = Magn_Yvalue;}if (Magn_Yvalue > Ymax) {Ymax = Magn_Yvalue;} int16_t Magn_Z

Hello,Is it possible to get the raw image from STHS34PF80 sensor? And what is

Hi,My MKI239A has been unrecognised by Unico 9.16 for weeks. The firmware of motherboard MKI109V3 is 3.58.2 which should be latest for windows (as shown in screenshot).By selecting MKI239A as MKI236A (ASM330LHB_ASIL_B) in Unico, the connection was smooth without error messages such as "who_am_I register not match", even though no readings were shown (see screenshot below).After that, I can even go back to Unico's first page and select my device as MKI239A. This time was also smooth without errors, but again, there were no readings...If I do not select MKI236 first, I can never avoid the error messages, which seems weird...I