- "Default" mode no longer supported
- 3 different measurement modes are introduced
Known bugs and issues
- If the iOS app crashes when connecting the sensor, please restart Bluetooth to refresh the Bluetooth services and characteristics following these steps:
- Go to Settings > Bluetooth
- Turn off Bluetooth toggle button and turn on again
Note – restart Bluetooth in Control Center cannot solve this issue since it is not a complete restart.
Difference from Android app
Note - iOS app will support all the features in next app release.
- Unlike the Android app that support 12 measurement modes, only 3 measurement modes are supported in current iOS app.
- Heading reset is not implemented
- Crash log is not implemented
Turn on the Xsens DOT and make connection with the app
Turn on the DOT sensors you want to connect by plugging in a USB cable. Once the sensors are on, you can either unplug the micro USB cable or leave it in charge while using the app.
It is important that users do not try to pair Xsens DOT in the Bluetooth tab of their phone as normally done with other Bluetooth devices such as headsets. This would make the sensors undetectable for Xsens DOT App
Launch Xsens DOT APP
Launch the app and it will automatically scan for sensors. Once the app is started wait until all your DOT sensors are detected. To start a new scan, drag the page down.
The Xsens DOT App requires the following settings to be enabled:
- Bluetooth on
- Full permission to read and write on the mobile device
If those requirements are not met when the app is started, you will receive a notification.
To connect a DOT sensor, click on the toggle switch that corresponds to the sensor you selected. When connection is established, the sensor will be highlighted and a popup message will appear at the bottom. In addition, you will be able to see the battery status and, by clicking on the DOT icon, you can access further details such as tag name, firmware version. If you have multiple sensors connected, it is recommended renaming them by editing the tag name to avoid connecting the wrong sensors.
Measure & Collect Data
Once your Xsens DOT sensors are connected, click on the “Measure & Collect” button at the bottom of the screen. By default, all the sensor will measure data if no other setting is changed. To change that, click on the selected tab button and uncheck the sensor you want to exclude. When you are ready to start measurement, click START on the top right corner.
Xsens DOT iOS app supports 3 different measurement modes. Here you can choose between Sensor Fusion Data and Inertial Data as well as the possibility to log the data file on your device.
- Sensor Fusion Data: includes Extended(quaternions) and Complete(Euler)
- Inertial Data: includes High Fidelity Data
Note: The "Default" mode featuring in version v2020.0 is no longer supported. This means that it is not possible to measure both Sensor Fusion and Inertial data at the same time in this release. More measurement modes with different data combinations will be introduced in next release.
After the chosen measurement mode is selected, click on the “START” button on the top right corner to start measurement. After a short sync, data charts for each sensor will be displayed. To view the graphs for multiple sensors, swipe left or right.
Note that for the case of Orientation data, Euler angles will always be displayed on the app.
To stop your measurement, click on the “STOP” button on the top right corner. Sperate csv files for each sensor will be stored in Files/On My Phone/Xsens DOT/Logs directory within your mobile device. You can fetch your files by using 3rd-party apps that allow you to access the internal directories of your phone, such as, "Files" or any file manager app.
Connect your phone to your PC and Open iTunes to export the data. Once your phone is detected, click on the phone-like button on the top left corner.
Then click on "File Sharing" on the left tab and select Xsens DOT app. The folder "Logs" will appear in the left window, which contains your measurement files. Click on the folder to select it and then click on "save" in the bottom right corner.
Once you store the folder on your PC, each subfolder will be named in the following format: YearMonthDay_HourMinutes. To facilitate the identification of the correct measurement, enabling Details view and sort it by creation date might help.
Each file can be opened with Microsoft Excel and the content of the csv file depends on the measurement mode previously chosen. This can include the following data:
- Packet counter
- Mag data (X,Y,Z)
- Orientation in quaternion (W,X,Y,Z)
- Free acceleration(X,Y,Z)
- Status Byte
For further information about each quantity, refer to our Xsens DOT User Manual.
App fails to install
It is possible that your processor architecture is not supported. Please refer to this Base article to check that.
Sensors are not detected
Make sure location services and Bluetooth are enabled first. Also, make sure the sensors are not paired in the Bluetooth tab of your phone.