MEMS and sensors

Posted on May 09, 2017 at 11:39I am getting a linker error L6218E when compiling code for the LSM6DS3 Gyroscope. The error points to the LSM6DS3_IO_Read and LSM6DS3_IO_Write functions. These have been declared and are to be imported but there is no definition for them and I am unable to locate any library for them.My question is - Are there any library out there for these functions in C or must I create one myself?Error: L6218E: Undefined symbol LSM6DS3_IO_Read (referred from lsm6ds3.o)

Posted on May 15, 2017 at 10:32Hey guys, I dunno what I add but seems I can't generate interrupt after I click on LIS3DH, here what I do.void Acc__EnableClickDetect(void){  LIS3DH_SetAxis(LIS3DH_X_ENABLE  |LIS3DH_Y_ENABLE | LIS3DH_Z_ENABLE );  LIS3DH_SetODR(LIS3DH_ODR_400Hz);         LIS3DH_WriteReg(LIS3DH_CTRL_REG3, 0x80);  LIS3DH_WriteReg(LIS3DH_INT1_CFG, 0x2A);  LIS3DH_SetIntConfiguration(0x2A);  LIS3DH_SetInt1Pin(0x80);  LIS3DH_SetClickCFG(LIS3DH_ZD_ENABLE | LIS3DH_ZS_ENABLE | LIS3DH_YD_ENABLE | LIS3DH_YS_ENABLE| LIS3DH_XD_ENABLE |LIS3DH_XS_ENABLE);  LIS3DH_SetClickTHS(50);  LIS3DH_SetClickLIMIT(50);  LIS3DH_SetClickLATENCY(100);   LIS3DH_Int1LatchEnable(MEMS_ENABLE);      LIS3DH_ResetInt1Latch();    return;}I dunno what I left or what function I added wrongly, could you guys please help through me? Thanks.#lis3dh

Posted on May 14, 2017 at 23:18Hello,I want to test the sample application. I can compel and load from uVision whithout problem.I connect a second USB cable  on the X-NUCLEO-CCA02M1 but the board is not recognized on my PC under Win 10. Thanks for your help.#mems-microphone

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Posted on May 09, 2017 at 11:40Hey guys, I am trying to do click detection for my LIS3DH accelerometer. For single click, what I should add inside my code? Here is my code, please help me. void Acc__EnableClickDetect(void){  LIS3DH_SetAxis(LIS3DH_X_ENABLE);  LIS3DH_SetODR(LIS3DH_ODR_400Hz);  LIS3DH_SetClickCFG(LIS3DH_ZD_DISABLE | LIS3DH_ZS_DISABLE | LIS3DH_YD_DISABLE | LIS3DH_YS_DISABLE |      LIS3DH_XD_DISABLE |LIS3DH_XS_ENABLE);  }Do I need to add Latency, Limit and Window inside the code? I tried to add it but when I call LIS3DH_SetClickLatency(200) inside the function, there was a warning Implicit declaration something like that.

Posted on May 11, 2017 at 05:46Hi All,I am using LSM6DS3  accelerometer and gyroscope sensor.I am interfacing with I2C. I have initialized the accelerometer register and reading the respective X,Y,Z register .I am not getting stable value. i am not understanding whether am configured it correct or not .I have attached the output picture.Please suggest me where i am doing wrong ?.Thanks in advance

Posted on February 12, 2016 at 19:38I've checked the LIS3DH's spec sheet and I can't find specs for input or output current on its I/O pins. Somewhat difficult to design in this part when we don't know its I/O pin current source/sink specs. Are these documented anywhere? Any data available on this? Thanks! #lis3dh-current

Posted on October 24, 2016 at 22:38Hello! I made a custom board with LSM9DS1  module on it. Pins SDO_M and SDO_A/G is tied together. I use SPI to communicate with module. When i write/read to/from accelerometer/gyroscope registers all works fine but when i am trying to read from magnetometer WHO_AM_I register or any other i get only 0xFF. I use separate CS pins for A/G and magnetometer.What may be wrong? As i understand it is not necessary to set up magnetometer registers to be able read from WHO_AM_I register. Don't understand what is the problem.

Posted on March 01, 2017 at 21:35Hello guys,I have LIS3DH module on my board and I plan to replace it since it is becoming obsolete.Would you like to let me know what would be the most appropriate replacement for LIS3DH? (pin compatible, register compatible...)Thank you very much for your time and effort.Sincerely,Bojan.#lis3dh

Posted on March 28, 2014 at 03:06Anyone know the difference between  LIS3DE and LIS3DH?I need to make a testing jig to test a product uses LIS3DE, so I need to evaluate the self-test function ,but I cannot get any datasheet of LIS3DE.And there is no info about  LIS3DE on ST site.Any one have datasheet of LIS3DE?  Thank you. #lis3de

Posted on May 07, 2017 at 19:43this is the LIS3DSH  accelerometer on stm32f4discovery board0.12 mg/digit sensitivity it has how to calculate exact output with respect to unit of gis there any tutorial or documentation that  explain stuff.##lis3dsh #mems #accelerometer

Posted on September 12, 2016 at 09:05I am using HTS221 for humidity and temperature measurement. On reading the registers for temperature and converting as per the equation suggested, i get the correct temperature. but on reading the registers for humidity and converting as per the equation suggested, humidity obtained is not correct. the register values read are as follows: H0_T0_OUT = 9 H1_T0_OUT = -10540 H0_RH_X2 = 53 H1_RH_X2 = 132 when humidity is measured in a controlled environment with different known humidities, the HTS221 measured humidity varies +/- 5 % within the range 26.5 % to 66% humidity(which is calibrated range of sensor), but outside the range that is lower than 26.5% and higher than 66%  variation of 10 to 20% humidity is seen. kindly help to get the correct humidity. regards unnati

Posted on April 26, 2017 at 21:12Hi, I am using IIS328DQ in a new design. I want to set up an interrupt when the orientation is tilted away from Z-axis. So I set up INT1 as XHIE, XLIE, YHIE and YLIE. ZHIE and ZLIE are disabled.Here is the setup sequence according an AppNote:1. write CTRL_REG12. write CTRL_REG23. write CTRL_REG34. write CTRL_REG45. write Reference6. write INT1_THS7. write INT1_DUR8. write INT2_THS9. write INT2_DUR10. read HP_FILTER_RESET (if filter is enabled)11. write INT1_CFG12. write INT2_CFG13. write CTRL_REG5here is the reading of the sensor and all the registers:AX -0.039AY -0.063AZ 0.965WHO_AM_I : 0x32CTRL_REG1 : 0x27CTRL_REG2 : 0x08CTRL_REG3 : 0xC0CTRL_REG4 : 0x30CTRL_REG5 : 0x00HP_FLT_RST: 0x00REFERENCE : 0x00STATUS_REG: 0x00OUT_X_L : 0x60OUT_X_H : 0xFFOUT_Y_L : 0x00OUT_Y_H : 0xFFOUT_Z_L : 0x70OUT_Z_H : 0x0FINT1_CFG : 0x0FINT1_SRC : 0x6AINT1_THS : 0x01INT1_DUR : 0x32INT2_CFG : 0x7FINT2_SRC : 0x00INT2_THS : 0x0FINT2_DUR : 0x01The problem is that, even

Posted on February 20, 2017 at 17:55 Hi, I have a problem to make interrupts (INT1 exactly) work with my LIS2DH12 Accelerometer. What I am trying to do is to make the int1 trigger when there is a Y-axis high event (or low event). I have setted all the required Registers for INT1 but it seems it is not working and I have even tried to look with an oscilloscope to see if it is doing something, but the results are still negative. I have read some posts before making this one but the answers weren't helpful for me. Can someone write down how they setted theirs interrupt registers to make them work correctly? Some additional information: 1- I don't need the HPCF so I have deactivated it (I think it is deactivated by default, if I remember correctly) 2- The REGs I have changed are: CTRL_REG3, CTRL_REG4, INT1_CFG, INT1_THS, INT1_DUR 3- The temp and XYZ-axis are working correctly Thank you for the help #lis2dh Note: this post was migrated and contained many threaded conversations

Posted on January 19, 2016 at 09:16Hello everyone, I have a STM32F4-Discovery board with an integrated MP45DT02 MEMS mic, and I've bought also anothere mic (an MP34DT01), I would like to record at the same time from the 2 mics. By now I've captured audio from the integrated mic, and simulated the other mic with a RAM-stored pdm bitstream... Now I want to capture audio from the 2 mics at the same time... To do so I've to capture a bit both on the rising, both on the falling edge of the clock fed to the mics, but I don't know how to do... Up to now I've captured bits from the integrated mic just on one edge using the I2S... This is my I2S configuration: static void WaveRecorder_SPI_Init(uint32_t Freq) {   I2S_InitTypeDef I2S_InitStructure;   /* Enable the SPI clock */   RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);   /* SPI configuration */   SPI_I2S_DeInit(SPI2);   I2S_InitStructure.I2S_AudioFreq = 32000;   I2S_InitStructure.I2S_Standard = I2S_S

Posted on April 14, 2017 at 06:46Sensortile doesn't work without SWD connection.When I compiled and ran the demo application(BLE app), only it worked when the sensortile with cradle was connected to SWD which is from Nucleo board. When the board is detached from SWD and working with battery, the flashed image doesn't work. It means the board doesn't work standalone by using battery. I've checked that the battery is fully charged. Could anybody help ?

Posted on April 21, 2017 at 02:34When will ST release the VL53L1 User Manual ?I need the detailed technical manual with registers and different mode functions.

Posted on April 26, 2017 at 15:29Hi at all,I am using the BlueSTSDK Android App to receive data transfered via Bluetooth Low Energy by the STEVAL-STLKT01V1 SensorTile.I would like to detect accelerometer events as orientations, single taps, etc, with this app but I don't undestand how to unblock the 'Accelerometer Events' in the 'Feature list' activity.In the FeatureAccelerationEvent.java file is reported that I must call the following functions:- detectEvent()- onDetectableEventChange()but I don't know where and how I must call this functions.Is there anybody that can help me?Best regards,Tommaso#sensortile #bluestsdk

Posted on April 27, 2017 at 08:02Hi guys, I am using the BlueNRG GUI to play with the BlueNRG motherboard with daughter board on it. I set the GAP role to peripheral and observer, my question is, can I scan device and advertise data at the same time?

Posted on April 06, 2017 at 03:27Two questions.  I'm implementing the VL6180X sensor in a system that needs to detect presence of objects placed in a tray.   The objects are generally small glass vials with different colored caps.  Question 1:  In ambient office lighting, the objects are detected at expected distances if the colored caps face the detector.  If the glass bottom of the vial faces the detector, it appears as if the detected distance is the cap on the other side of the vial.  It does not seem to detect the glass bottom of the vial.   What would cause that and what is the solution to detect the glass bottom (note: the vial may be as close as 15mm and as much as 70mm from the sensor- there is no cover glass on the sensor).Question 2: After the object is placed and the distance detected, a cover door is closed which puts the object in the dark.   But in this low light condition, the detected range increases by as much as 30%. &nbs

Posted on February 23, 2017 at 02:39Hi, I have a project that uses LIS3DH. I just noticed an update at the Datasheet and now there is a  CTRL_REG0 that I can disable the SA0 pull-up. Is this available since the beginning or just on new batches of the device?

Posted on April 24, 2017 at 15:40When I transition from a powerdown state to any of the ODR's in FIFO mode I get initial values (first 1 or 2 sample sets) in the FIFO buffer that are very erratic. Should there be a period of time after transitioning out of a powerdown mode before the FIFO is enabled?

Posted on April 24, 2017 at 15:02Hi, I've VL53L0x Satellites board and according to datasheet page 21, section 3.2http://www.st.com/content/ccc/resource/technical/document/datasheet/group3/b2/1e/33/77/c6/92/47/6b/DM00279086/files/DM00279086.pdf/jcr:content/translations/en.DM00279086.pdf I should be able to read register 0xC0 for i2c validation. I've 5V, gnd, SDA and SCL hooked up to my AArdvark total phase i2c analyzer. I also use Aardvark activity board to make sure i2c is working properly and it is working properly. However, when I hook it up to satellite board, I was not able to read anything. Is there I need to do to get it initialized.http://www.st.com/en/evaluation-tools/53l0-satel-i1.html picture below is reading register 0x1A from Aardvark activity board.

Posted on June 28, 2016 at 11:15I'm trying to use UNICO with an eval board that contains the LPS22HB sensor.  I cannot find this device under their Environmental sensors device list.  Is there a way to add it to the list, or to update UNICO?  I'm using version 4.2.0.0.  Is there an updated version that has the LPS22HB pressure sensor in it? #lps22hb-sensor-non-recognition #lps22hb-unico

Posted on April 22, 2017 at 12:21I am currently trying to interface LIS2DE12 Mems Accelerometer in our project.The datasheet is all about hints more than explanationsI scrolled around datasheet and couldn't find the meaning for AOI Function interrupt,  IA_1  & IA_2 InterruptCouldn't even guess these things.What are those interrupts mean ?And one more doubt :There are interrupts for new data available in x,y and z axisWhat is that new data actually mean ?I think new data will be available in the rate of ODR (Output Data rate). So why there is a separate interrupt needed for that ?Or will the interrupt occurs when a new data is available which crosses a threshold difference of the old data ? ----------------------------------------------My Requirement :* Activity detection (Rest to Motion)* Inactivity detection (Motion to rest)----------------------------------------------#accelerometer #lis2de12 #lis2dh12