MEMS (sensors)

Posted on May 30, 2017 at 14:35Hello Engineer's,                             I have IIS2DH IC interface with STM32LOXX Controller through I2C mode. Pin Details bellow:          IIS2DH (Pin)      --      M/C (Master)         1. SCL/SPC         -     SCL(I2C)         2. CS                    -     Vss(+3V)         3. SDO/SAO        -     Vss(+3V)      &n

Posted on May 05, 2017 at 18:05I am trying to connect the EVALSTPM34 SPI interface to a microprocessor board that has a PMOD interface (see attachment) that is configured to support SPI.===========================================================PMOD SPI Interface to EVALSTPM34 Metering Board===========================================================Set rotary switch to 2MASTER             SLAVE(freja board)         (EVALSTPM34 board) PMOD J6 'SPI'1 (SS) ------------> (SCS) 52 (MOSI) ---------> (MOSI) 23 (MISO) <---------- (MISO) 44 (SCK) -----------> (SCL) 6                               (GND) 3                               (VCC) 10                               (SYN) 8    &nbs

Posted on May 12, 2017 at 17:04 Hi; I have stm32f103c8t6 mcu and LSM330 6DOF imu sensor. I try to read from LSM330TR imu sensor. I have a problem. When I read gyro datas from imu, everything is OK. I can read them, but when I tried to read acc datas from imu, I can't read them. I think problem is in sensor or there is something out of sight.Could you help me solve this problem?What could the cause of the problem? Note: this post was migrated and contained many threaded conversations, some content may be missing.

Posted on May 23, 2017 at 08:34Hi,I am using lsm9ds1 sensor in my design, i am looking linux driver for this sensor.Please help me.Thanks,

Posted on May 24, 2017 at 18:14Hello, I have this IC and I need to find the product code.Someone could help me?Thanks,Dario#

Posted on May 24, 2017 at 05:52Details in the attachment

Posted on May 23, 2017 at 06:01Hey guys, I am doing single and double click interrupt generate for LIS3DH accelerometer. I have a question, it is possible single click will generate interrupt when set both single&double click. I found out the accelerometer will only generate interrupt when I tap on the accelerometer twice. So, it is possible to generate interrupt when I tap the accelerometer only once? I have a function to handle interrupt, it will only generate interrupt when I tap it twice. Izzit normal? #accelerometer

Posted on June 20, 2016 at 12:44Does anyone have any characteristics for the AA filter and method on the LIS3DH accelerometer?E.g. slope, number of poles, type...ThanksKevin #lis3dh

Posted on June 15, 2016 at 17:15Hello, I'm working with LIS2DH on SPI, where also some other SPI slaves are connected. The supply power is 3.0V, VDD and VDD_IO are connected. I configure it and keep reading the accelerations x,y,z just fine. But in certain circumstances the z acceleration is wrong or the values are frozen. I identified the following: The behavior depends on the power supply cycle. If I disconnect my device from power supply when the rest voltage on the capacitor did not drop bellow around 0.3V, it will work. If the device is disconnected for some time, the voltage drops bellow 0.3V. Then the z accelerometer does not work correctly. It reads some 1g instead of -1G and 3G instead of 1G and it seems to be linear. Another device reads some 1.2G instead of -1G and some other value instead of 1G. So it is not the same as in the first case. When connected when the value is around 0.3V the readings sometimes freeze in all 3 axis. The mentioned 0.3V does not to be a fixed val

Posted on May 20, 2017 at 12:43Hi, I was trying to use esp8266 wifi sensor as a client to send data, measured with other sensor, to my online web server. I'm using this library: https://developer.mbed.org/users/quevedo/code/ESP8266/ but there's nothing about sending http requests or I'm missing something.thanks for support#esp8266 #http-request #wifi-sensor

Posted on May 08, 2017 at 01:17The LSM9DS1 data sheet shows that the accelerometer/gyroscope module's two interrupts can be configured either as open-drain or push/pull.  However, I am missing the description of the magnetometer module's interrupt.  I assume that means it is fixed and cannot be user-configured.  Is it fixed as open-drain type, or as push/pull type?#interrupts #lsm9ds1 #push-pull-output-or-open-drain-output

Posted on May 15, 2017 at 15:36Hi,I am working on a project that is using LIS2DH sensor for measuring the acceleration along the X,Y and Z-axis. I have configured the IC as per the following configurations:-1>Using the 8-bit resolution to capture the data of X,Y and Z-axis.2>we have enabled the low power mode of this sensor.3>We have set the ODR as 50 Hz.when we set the full scale value as +/-4g, then we get the default value for OUT_X register as 0, OUT_Y register as 0 and OUT_Z register as 30 since there is a constant acceleration along Z direction with magnitude of 1g due to gravity when the device is static. Since we are using 8-bit register the range can be vary from -128 to +127, so the default magnitude that can be achieved is 32*30 (1LSb = 32mg as per data sheet) i.e. 0.96g which is approximately equals to 1g.When we set the full value to +/-8g then the default value when the device is static along the Z-axis is 15 so 15*64 (1LSb = 64mg as per datasheet ) i.e. 0.96g w

Posted on May 16, 2017 at 01:47I configured the LIS3DH in stream FIFO mode. Then I set the WATERMARK level as 8 bytes and I poll the FIFO_SRC_REG to see if the WTM bit is 1 and then I collect the 8 bytes of data accumulated in FIFO. Now my problem is, in the code, for debug purposes, I display the data I collected and this reduces the number of data points I read when the program is run for n seconds. That is, when I run the code without displaying for the same n seconds, almost double the amount of data points is being read. Why is this ? In the program I check the overrun flag in FIFO_SRC_REG too. But it is never set during the run of the code. So I should not be losing any data while reading and printing it. My questions :1. Does the overrun flag not work in Stream mode ? i.e when new data is overwritten does it not stay high ?2. Does the FIFO stops accepting data when data is being read from it ?#lis3dh-fifo #lis3dh #lis3dh-spi

Posted on May 19, 2017 at 10:50Hey guys, it is possible to configure single and double click at the same time? When I enable double and single click at the same time, it seems that the accelerometer only detect double click. Any solution to this ?#accelerometer #lis3dh

Posted on May 12, 2017 at 12:04Hello. I have a problem with humidity measurement. Despite the proper value of temperature, te humidity is always over 100%. I'm using the official ST software. I'm wondering if it is a hardware problem ?The initialization is as following:...HTS221_Init_st cfg_struct; cfg_struct.avg_h = HTS221_AVGH_4; cfg_struct.avg_t = HTS221_AVGT_2; cfg_struct.odr = HTS221_ODR_1HZ; cfg_struct.bdu_status = HTS221_ENABLE; cfg_struct.heater_status = HTS221_DISABLE; cfg_struct.irq_level = HTS221_LOW_LVL; cfg_struct.irq_output_type = HTS221_PUSHPULL; cfg_struct.irq_enable = HTS221_DISABLE;HTS221_Get_DeviceID(&deviceID); HTS221_Set_InitConfig(&cfg_struct);/* it is activation function in fact !!! */ HTS221_DeActivate();while (true) {          HTS221_Get_Measurement(&humidity, &temperature);         ... some delay and read data}#humid #hts221 #humidity #sensor

Posted on May 16, 2017 at 18:23Hi, is there any pdf available relating to the operation of the Unico Lite GUI. I have version 2.0.0.0 installed but I cannot seem to get it to communicate with the LSM6DS3.Thanks#lsm6ds3 #unico-lite

Posted on May 15, 2017 at 18:45Hello,I have the a question about LIS3MDL.I have read http://www.st.com/resource/en/datasheet/lis3mdl.pdf and an http://www.st.com/resource/en/application_note/dm00136626.pdf, but have no idea, how to interpret the data according to chapter 3.3 Understanding magnetic data.Maybe I am missing something, but it seems we are supposed to reverse engineer the data from the table? I can't see any equation as in ANs for another components.Thank You,David#e-compass #magnetometer

Posted on May 15, 2017 at 17:04How i can translate the raw data from LIS2DS12 to G for 2/4/8/16g range?#raw #g #lis2ds12

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