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Frequently asked questions

What is included in the Xsens DOT starter set?
5 Xsens DOT sensors
1 Charging case
1 usb cable

How many sensors can be connected to a mobile device?
This depends on how many Bluetooth connections your device can handle simultaneously. Check out the specification of your device for this data

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. Additionally, every device that supports at least Bluetooth 4.2 can be used to connect to Xsens DOT through the Bluetooth protocol. For further information, check our BLE service manual.

Android: Xsens DOT App and SDK
-BLE 4.2
- Android 8.0 or above
- Architecture ARMv8

iOS: Xsens DOT App and SDK
-BLE 4.2
- iOS 9.0 or above

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 provides the “Xsens DOT App” for Android and iOS, downloadable for free from the Apple store or Google Play store. 

What is the difference between the different measurement modes (Inertial and Sensor Fusion) that can be selected in the app?
Inertial data mode will only stream inertial data and the package size will depend upon the amount of data you stream. Sensor Fusion mode will stream the data that went through our Kalman filters and the package size depends upon the amount of data chosen. 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 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 Xsens 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 sensor 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 or Apple store

Does Xsens DOT support PC connection?
If you are not going to use a mobile phone for your application, you can check out our Xsens DOT BLE Service Specification Manual . This is a low level communication protocol that would allow you to develop your application in any OS, making it suitable for your intended device as long as Bluetooth is supported.
Additionally, you can download Xsens DOT Server as an example project. Since it is completely open source, you can download the source code and adapt it to your own needs. You can read more about Xsens DOT Server here.

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.

Is the Bluetooth utilizing 1M PHY or 2M PHY
The 1MB or 2MB PHY depends on the central device. For example, if the phone being used supports 1MB PHY, the sensor will adopt 1MB PHY. If the phone support 2MB PHY, the sensor will adopt 2MB PHY.

Can Xsens DOT be used in conjunction with MVN?
No. MVN is a licenced software that works only with MTw or MTx trackers.

 

 

 

 

 

 

 

 

 

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