MEMS (sensors)

HeyLSM6DSV16B is sold as an accelerometer unit that can be used to record vibrations as an audio signal. The datasheet mentions that this audio signal can be placed on the TDM interface, but I doesn't really say how.Does anyone have experience with this product? Is there already a code library for using this device for audio?

Hi everyone, some of my initial issues have been solved while one is still remaining. Most Bluetooth 5 devices cant connect to the Bluetile sensor node. I have to use the programmer board with the sensor node on it connected via USB to establish a bluetooth connection. This fails with most BT5.x Laptops: 1 ASUS, 1 Lenovo, 1 Dell and my Fairphone 5. Sometimes pairing works with an ASUS Bt5.0 USB-dongle but sometimes connects and sometimes doesn't. E.g. the node has rested for about 5 minutes in battery mode and has (magically) connected. This seems very random and is the same problem as with the second Bluetile node we are using. The figure shows the deactivated Intel BT4.x Adapter. The sensor node is represented by the 2 black question marks. While connecting via BT4 it says BCN002. In Bluetooth menu it always says BCN002.. I can connect via Intel BT4.x and ASUS BT4 USB-dongle. Is the stock firmware unable to work properly with BT5.x? Thanks for reading th

Hi,I'm looking for the information about the number of sensor ADC samples per output data, in low power mode Vs. the high resolution mode.I found the following description in AN5069:"The difference distinguishing the two modes is in the number of samples used to generateeach output sample, which is four times less in Low-Power mode than the number used inHigh-Resolution mode, thus ensuring a lower power consumption"However, I didn't found what the actual number is.Thanks,Dagan

I am looking to design board with LIS3MDL (Mag) with ICM42688(Acc and Gyro) snd MS5611(baro) on single board with single SPI bus through different CS for all IC's. However for LIS3MDL the CS is used to switch between I2C and SPI interface. 1. Will the design work with all these 3 ICs on same SPI bus.2. Will the LIS3MDL IC start driving signal on SDI pin(considering it as I2C command) when CS is high for it and low for other IC.3. can multiple LIS3MDL on single SPI bus possible with different CS.   

Hello, "1/ODR (1 à 200 HZ)" is it the response time of the sensor ?Thank you 

Hello,What is the supply current into the VDD_IO pin on the AIS2IH? The VDD supply current requirements are explained in detail, but I do not see any note on the current into the VDD_IO pin.Best regards

According to AN5192 (last paragraph of page 50) if LIR is enabled (0x56:0x4F)  and SINGLE_DOUBLE_TAP is set (0x5B:0x80) "latched mode is applied to the double-tap interrupt signal only".But I only read single tap in TAP_SRC (0x1C:0x20) during ISR.As soon as I disable LIR I get both interrupts.Is there an error in AN5192 and only single tap will be signalled when LIR = 1?Or I made a mistake somewhere in the registers?Here is my register dump:# i2cdump -yf 1 0x6a 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef 00: 00 00 3f 00 00 00 00 00 00 00 40 00 00 08 00 6c ..?.......@..?.l 10: 60 28 44 08 60 00 00 00 e2 20 02 0f 00 20 07 28 `(D?`...? ??. ?( 20: b3 01 0d 00 ee ff f5 ff b2 01 23 00 63 41 00 00 ???.?.?.??#.cA.. 30: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 40: cd 05 20 00 f3 05 20 00 00 04 00 00 00 00 00 00 ?? .?? ..?...... 50: 00 00 00 00 00 00 4f 06 86 06 8a 80 00 00 4a 00 ......O?????..J. 60: 00 00 00 fd aa 01 00 00 00 1a 21 21 40 06 00 00 ...???...?!!@

Hello All,is it normal that the data in the offset calibration registers disappears after a power restart?  

Hi,From the following repo https://github.com/STMicroelectronics/st-mems-android-linux-sensors-hal/tree/masterI would like to know if the driver it's compatible with an Android environment under snapdragon where all the sensors part is managed under the ADSP and the SSC core library. On this systems the sensors part is managed trough the SSC Framework who handles the sensor core functions.Does anyone have experience with it or know if it is compatible?Thank you.

Hi there,I've recently been exploring the BL4S5IIOT01A board and successfully followed the documentation provided https://catalog.us-east-1.prod.workshops.aws/workshops/b5857416-f2f6-4188-8562-053ec5f983ef/en-US to learn how to connect the board to IoT services using its built-in sensors. Now, I'm interested in creating projects that involve custom sensors on this board.Could you please provide documentation or guidance on how to build projects from scratch, integrating custom sensors with the BL4S5IIOT01A board?Thanks in advance!

Hi, I want to receive data coming from the sensor without loss.For the testing, sampling rate is set to 32Hz.26667(ODR) / 800 = 32hzif set like this, 32 data per second will be accumulated in the buffer.and CNT_BDR_THR was set to 100.also, FIFO_MODE was set to continus mode.I am reading data by checking counter_bdr_ia as shown in the code below.My expectation is that counter_bdr_ia should occur approximately once every 3 seconds, but counter_bdr_ia is occurring faster than that.Please let me know what's wrong. Or please give me an example for reading without data loss.  Spoiler (Highlight to read)uint16_t fifoDataCnt;iis3dwb_fifo_status2_t countFlag;static uint32_t time_count = 0;while(1){time_count = XTHAL_GET_CCOUNT();iis3dwb_fifo_data_level_get(&dev_low_ctx, &fifoDataCnt);iis3dwb_fifo_status_get(&dev_low_ctx, &countFlag);if(countFlag.counter_bdr_ia == 1){printf("Buff chk Before %d %d counter_bdr_ia %d \n", time_count, fifoDataCnt, countFlag.counter_bdr

Hi,I want to set the raw data to around 2k bandwidth and receive all data through FIFO.From what I understand, to set it to 2k bandwidth-Bandwidth ODR/4 = 2.6kHz, HPCF_XL = 0, LPF2_XL_EN =1-FIFO_CTRL3 BDR_XL = 0b1010 ( 26667Hz ) And at this time, if the speed of BDR_XL value is greater than the set bandwidth,  all sampling data can be received from FIFO buffer.is my explanation correct? Additionally, what are the units of the BDR_XL value? is 2666.7hz unit?

Dear all,I want to set LIS2DUX12TR to detect if there is a motion of the board, like a theft detector.The board is battery powered, so, I was thought to use INT1 pin to wake my PIC18LF26K22 uC to send some data.For me, is for time when I interact with an accelerometer sensor, so, please be kind with me.I read the datasheet, and I found I must enable some function in registers (like bits in EMB_FUNC_EN_A, route interrupt to INT1 pin, send to sleep, etc)  but, I'm not sure which one.I wonder if there is a software, something to visually  configure register and at the final give me an output with modified register and just put the new values on LIS2DUX12TR, or , maybe, someone cold  indicate me what should I do.Thank you in advance for your time.Best regards LE: I don't have any special board, just the board with my uC and LIS2DUX12TR, so, I cannot use MEMS Studio (or I don't know how to use it offline)

GreetingsI am currently using the LIS2DW12 accelerometer, in continuous-to-fifo mode, with the wake-up interrupt configured to INT1, and the DIFF5 interrupt configured to INT2. All works well, as I'm able to read the FIFO contents when the FIFO is full after the interrupt occurs. I am now trying to use the INACTIVITY functionality, using the SLEEP_CHG interrupt on INT2. I was able to get this working previously, where I used the wake-up interrupt on INT1, and SLEEP_CHG on INT2, as advised in this post.If I combine interrupts on INT1 or INT2, the accelerometer fails to work at all. I have tried other FIFO interrupts (both FIFO_FTH and FIFO_DIFF5) on both pins, with no success. As a result, I am unable to sample, and store samples in the FIFO, and then let the accelerometer go into its inactivity state. I am only able to  use the wake-up interrupt on INT1, and the FIFO_DIFF5 interrupt on INT2.Is there a reason for this and\or has it been picked up before, or am I surely doing s

Hi,I am trying to get accelerometer and gyroscope readings from the LSM6DSL via a python script.Here is my code so far:def init(self):# activate gyro and accelself.write_reg(0x10,0b0110) #activate accelerometer (writing ODR_XL[3:0] in 0x10) at 416Hzself.write_reg(0x11,0b0110) #activate gyro (writing ODR_G[3:0] in 0x11)self.write_reg(0x06,1) # set fifo threshold to 1. only 1 piece of data stored at a time.self.write_reg(0x08,0b00001001) # acceleromter and gyroscope being written to FIFOself.write_reg(0x09,0b1) # enable fifo threshold, no other data being storedself.write_reg(0x0A,0b00110110) # ODR=416, contonuous mode (end in 001 for fifo mode)self.write_reg(0x12,0b01) # enable block data update (output registers not updated until MSB and LSB have been read)def read_fifo(self):status = self.read_reg(0x3A,2,raw=True)# read the FIFO_STATUS1 and FIFO_STATUS2 registers to see how much data is thereprint('status:',status)data= self.read_reg(0x3E,2,raw=True)char_array = []for char in data:cha

Hello, I want to use the SensorTile.box to collect IMU data over BLE. I tried modifying the BLESensors source code to suit my requirements (by increasing the characteristic size etc.). But the ST BLE Sensor app doesn't seem to support this. I only receive one sample at a time. Is there any way to do this? Code Snippet 1: #define BUFFER_SIZE ( 32 ) if (InertialFeaturesEnabled.AccIsEnable == 1U) { for(int i = 0; i < BUFFER_SIZE; i++) { STORE_LE_16(buff + BuffPos, ((uint16_t)Acc[i].Axis_x)); BuffPos += 2U; STORE_LE_16(buff + BuffPos, ((uint16_t)Acc[i].Axis_y)); BuffPos += 2U; STORE_LE_16(buff + BuffPos, ((uint16_t)Acc[i].Axis_z)); BuffPos += 2U; } } if (InertialFeaturesEnabled.GyroIsEnable == 1U) { for(int i = 0; i < BUFFER_SIZE; i++) { STORE_LE_16(buff + BuffPos, ((uint16_t)Gyro[i].Axis_x)); BuffPos += 2U; STORE_LE_16(buff + BuffPos, ((uint16_t)Gyro[i].Axis_y)); BuffPos += 2U; STORE_LE_16(buff + BuffPos, ((uint16_t)Gyro[i].Axis_z)); BuffPos += 2U; } } ret

SPI communication of ISM330DLC with microcontroller fails rarely and randomly. Most of the time, it is observed when it is on a vibrating source. Could you pls give us some idea to know more about this issue and solving it.

Hi, Could you provide any method/code to convert the acceleration values to distance(in cm)? we are able to read the acceleration but we need to know the distance covered as well. How to do it?  

Does the Mems sensor LPS22HBTR require exercising before first use? Our company uses these for detectioopn of objects hitting a membrane and we have come to find out that it appears the mems sensor sometimes needs a puff of air in order to begin working correctly. Is this true, is there some kind of standard first time procedure before using the sensor that I am not aware of?

Hello, IIS3DWB documentation provides only two data points about power consumption:Accelerometer current consumption @ 1.1mA typ.Accelerometer current consumption during power-down @ 5µA typ. I want to be woken-up on vibration levels (on X, Y or Z axis) when a specific threshold gets crossed. The datasheet provides all information about how to do that. However I miss the µA targets. I understand that ODR is fixed anyway @ 26.6667 kHz but I m guessing that power consumption should be well below the nominal 1.1.mA. My target is in the tens of µA to 100 µA range maximum. Else I need a second accelerometer to provide the function. Note: I can cut VDDIO during such mode (VDDIO distinct from VDD) but still need INT1 event toward my microcontroller. Can you provide typical power consumption in such mode so that I can finalize my architecture. ThanksBest Regards,Stephane 

Hello . I have to boards L476RG and 303RE and of course IKS01A3 . After installing Unicleo , I can't connect to that IKS (It's not even showing port )  . I'm changing boards but still It can't see it . On some tutorials some lady was coping some files to the folder which is being created after connecting the board to USB . But my board is not even existing in examples . Simple question : How I can connect IKS using my boards (476RG or 303RE ) vand see the values from sensors ? Best Regards , Samu  

LIS2DE12용 Junction to Ambient, LGA-12 패키지의 열 저항이 필요합니다.

Hi all,I'm currently not able to read the temperature of my lis2de12.It always returns zero. lis2de12_temperature_meas_set(&dev_ctx, LIS2DE12_TEMP_ENABLE);lis2de12_data_rate_set(&dev_ctx, LIS2DE12_ODR_400Hz );lis2de12_block_data_update_set(&dev_ctx, PROPERTY_ENABLE); What could be the issue here?I'm only reading temp, not X Y Z values yet. UPDATE:After playing around reading OUT_TEMP_L (0Ch), OUT_TEMP_H (0Dh) separately, my code now reads twice 0x80.I think my platform functions are not incrementing the register address?static int32_t platform_read(void *handle, uint8_t reg, uint8_t *bufp, uint16_t len){HAL_I2C_Mem_Read(handle, LIS2DE12_I2C_ADD_H, reg, 1, (uint8_t*)bufp, len, 1000); return 0;} Otherwise I would assume seeing 0x0D in the scope image.  

Hi Please can you advise on the Thermal Resistance (K/W) of LSM6DSOXTR please so we can complete our ATEx evaluation. Many Thanks Dominic

Hello,LIS2DH12 accelerometer. AN5005 datasheet. How is the data in the table in column 1 (Acceleration values) calculated? (See Figure 1). I read the calculation process in the datasheet above, but did not understand it. (See Figure 2).