Developer Portal Community

    cancel
    Showing results for 
    Search instead for 
    Did you mean: 
    SOLVED

    Sensing Data Accurate?

    Highlighted
    Established Member

    Sensing Data Accurate?

    Hello all,

    with the XDK at rest, I'm getting the below readings, does it make sense? Can you help with the units below?

    "accel_x":"0","accel_y":"26","accel_z":"1025"    <------is this accurate? shouldn't x=y=0 at rest?

    "mag_x":"45","mag_y":"-15","mag_z":"-24"

    "gyro_x":"1952","gyro_y":"-1403","gyro_z":"-14518", <----- does this make sense? what is the unit?

    "lux":"2880"   <------- what is the unit by default? with more light, the value goes up to 188000

    "hum":"61",  <-----Ok

    "presure":"98908" <-----Ok

    "temp":"24.671",<----- this is Celsius i assume

    "noise":"0.000518"  <-----what is the unit? is this in mVrms?

    3 REPLIES 3
    Highlighted
    Senior Member

    Re: Sensing Data Accurate?

    Hi Nicolas,

    Please see inline replies.

    "accel_x":"0","accel_y":"26","accel_z":"1025" <------is this accurate? shouldn't x=y=0 at rest?

    +/-200milli g due to internal noise.

    When you place XDK in static position and 'z' axis points towards earth (there are notations marked for x,y,z axis on XDK device), The acceleration in z axis detected by XDK is not '0', it is 9.8m/s2, that is due to earth gravity  (9.8m/s2 is equal to 1g). Here the unit is milli g (1000 mg = 1g).

    "mag_x":"45","mag_y":"-15","mag_z":"-24"

    ±1300μT (x, y-axis), ±2500μT (z-axis) these are the maximum magnetic field strength detected by XDK in micro tesla. When you move XDK in x axis towards/outwards north direction from your place you can observe x axis value increase/decrease towards 1300micro tesla, similarly for other axis. Or you can take magnet and move towards XDK device x axis, you can see magnetic field varies.

    "gyro_x":"1952","gyro_y":"-1403","gyro_z":"-14518", <----- does this make sense? what is the unit?

    Unit is milli degrees per second. Here x = 1.952 dps, y=-1.403dps, z= -14.518dps. Ideally in static position it should be x = 0, y = 0, z=0.Due to internal noise +/-20 dps is acceptable

    "lux":"2880" <------- what is the unit by default? with more light, the value goes up to 188000

    0 lux to 1,88,000 lux is default. In apllication the unit is in milli lux. So, 2.88 lux, 188 lux is shown in your data.

    "hum":"61", <-----Ok

    %rh

    "presure":"98908" <-----Ok

    Pa

    "temp":"24.671",<----- this is Celsius i assume

    yes

    "noise":"0.000518" <-----what is the unit? is this in mVrms?

    It is in Vrms.

    Also, for tracking purpose of message threads, please ''accept as solution'' if you got answers.

    Thank You 🙂

    Highlighted
    Established Member

    Re: Sensing Data Accurate?

    Is there upper boundary on Lux, i noticed the value goes over 1M milli lux? there is min upper range for this data point?

    Highlighted
    Senior Member

    Re: Sensing Data Accurate?

    Hi Nicolas,

    In milli lux the max value is 1,88,000,000 milli lux.

    Thank You 🙂

    Icon--AD-black-48x48Icon--address-consumer-data-black-48x48Icon--appointment-black-48x48Icon--back-left-black-48x48Icon--calendar-black-48x48Icon--center-alignedIcon--Checkbox-checkIcon--clock-black-48x48Icon--close-black-48x48Icon--compare-black-48x48Icon--confirmation-black-48x48Icon--dealer-details-black-48x48Icon--delete-black-48x48Icon--delivery-black-48x48Icon--down-black-48x48Icon--download-black-48x48Ic-OverlayAlertIcon--externallink-black-48x48Icon-Filledforward-right_adjustedIcon--grid-view-black-48x48IC_gd_Check-Circle170821_Icons_Community170823_Bosch_Icons170823_Bosch_Icons170821_Icons_CommunityIC-logout170821_Icons_Community170825_Bosch_Icons170821_Icons_CommunityIC-shopping-cart2170821_Icons_CommunityIC-upIC_UserIcon--imageIcon--info-i-black-48x48Icon--left-alignedIcon--Less-minimize-black-48x48Icon-FilledIcon--List-Check-grennIcon--List-Check-blackIcon--List-Cross-blackIcon--list-view-mobile-black-48x48Icon--list-view-black-48x48Icon--More-Maximize-black-48x48Icon--my-product-black-48x48Icon--newsletter-black-48x48Icon--payment-black-48x48Icon--print-black-48x48Icon--promotion-black-48x48Icon--registration-black-48x48Icon--Reset-black-48x48Icon--right-alignedshare-circle1Icon--share-black-48x48Icon--shopping-bag-black-48x48Icon-shopping-cartIcon--start-play-black-48x48Icon--store-locator-black-48x48Ic-OverlayAlertIcon--summary-black-48x48tumblrIcon-FilledvineIc-OverlayAlertwhishlist