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Frequently asked questions

What is included in the Xsens DOT starter kit?
5 Xsens DOT sensors
1 Charger
1 usb cable

How many trackers can be connected to a mobile device?
The Xsens DOT App supports a maximum of 5 Xsens DOT senors. However, virtually no connection limit is set if you are using the SDK.

What devices are supported?
Minimum requirements for Xsens DOT are listed below. Note that the best performance is achieved with BLE 5.0. For a list of the mobile devices officially tested by Xsens, check out the release notes on our product page.

Xsens DOT SDK
-BLE 4.2
- Android 8.0 
- iOs 10 will follow in the near future
- Architecture AEMv8

Xsens DOT App (android)
- BLE 5.0
- Android 8.0
- Architecture AEMv8

Can I use Xsens DOT underwater?
Xsens DOT is waterproof according to rating IP68, meaning that it can be used up to 5 meters of depth. However, bear in mind that Bluetooth signal range significantly decreases underwater. For further information, check out the links below on Bluetooth range underwater. 
https://www.underwateraudio.com/blogs/swimming-and-fitness-blog/wireless-and-water-101
https://gearpatrol.com/2017/07/06/underwater-audio-headphones/

What is the charging and discharging time for Xsens DOT?
Maximum battery life during continuous recording is 5 hours and 30 minutes. Charging time from empty battery to 100% charge takes about 1 hour and 15 minutes. Further information about battery specifications can be found in our Xsens DOT user manual.

What apps does Xsens provide?
Xsens will provide the “Xsens DOT App” downloadable for free from the asset page. 

What is the difference between the different measurement modes (default, inertial, orientation) that can be selected in the app?
Default mode will stream all type of data, both inertial and orientation. The size of the package is 63 bytes. Inertial data mode will only stream inertial data and the package size is 35 bytes. Orientation data mode will only stream orientation data and the package size is 36 bytes. For further details about the data type, check out our user manual.

Can I obtain the raw data from Xsens DOT?
The data that is provided at 60Hz after the strap-down Integration prior to sensor fusion algorithm processing is accessible. The raw data collected by the Xsens DOT sensor at the internal sampling rate of 800Hz is not accessible. More information can on data output can be found in the Xsens DOT user manual.

Do I need to perform the MFM again after the firmware update?
No. Magnetic field mapping will not be altered or reset by upgrading the firmware.

What is the default power-saving time for DOT?
10 mins in advertising mode (tracker is powered on but not connected to BL device) and 30 mins in connection mode (tracker is connected to BL device but not measuring). The tracker will power off when the button is pressed for over 3 seconds or the battery level is lower than 2%

To what extent is DOT affected by magnetic distortions?
The Xsens Kalman filters can compensate for magnetic field distortions for a short period of time (about 20 seconds). MFM can be used to recalibrate the magnetometer in presence of constant and homogenous magnetic fields. Check out BASE and tutorial videos for further information.

Does Xsens provide a drawing for the sensor case?
Xsens can provide a STEP file as a 3D model of the case. You can download it here

Does Xsens DOT output a digital or analog signal?
Digital

Does Xsens DOT app include a human model?
No

Is Xsens DOT app free?
Yes, it's completely free to download from the Google Play store

Does Xsens DOT SDK support PC connection?
No, but it is possible to use the Bluetooth protocol to build an interface between PC and Xsens DOT

What programming language does Xsens DOT SDK support?
Android and iOS

Is it possible to compare movements or analyze movements?
It is certainly possible to use data from Xsens DOT to perform human motion analysis. However, comparison data is not directly provided by Xsens DOT App but rather it has to be calculated by the end user depending on their needs.

 

 

 

 

 

 

 

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