3.3.8 Button callback function
If there is a single click on the power button during connection, a BLE notification will be
sent with a timestamp when this single click is applied. This function is called “Button
callback”. It is further explained in the Xsens DOT SDK programming guide and the BLE
Service Specification. Refer to those for more information.
3.4 Magnetic Field Mapper
When Xsens DOT sensor is mounted to an object that contains ferromagnetic materials,
the measured magnetic field can become distorted, causing errors in measured orientation.
To correct for known magnetic disturbances, Magnetic Field Mapper function has been
developed to allow users to remap the magnetic field of the sensor.
The MFM can be executed in a few minutes and yields a new set of calibration values that
can be written to the Xsens DOT’s non-volatile memory, which means it will not be erased
by powering off or firmware updates.
You can perform MFM with 5 sensors at the same time. Follow these steps to do the MFM
for Xsens DOT. Here is a detailed BASE article
about how to do MFM in the App.
1. Open Xsens DOT App (Android or iOS)
2. Connect the target sensors
3. Go to Advanced Magnetic Field Mapper
4. Select sensors to start MFM
5. Rotate the sensors slowly around all three axes and in all directions to collect data
for magnetic field calibration. The process automatically checks for data points that
are relevant and give sufficient coverage for a proper MFM procedure. The progress
bar indicates this and once the bar reaches 100%, MFM process will begin
automatically.
6. MFM is successful when showing “Finished”. Restart the MFM if it fails.
A .mtb file containing the calibration data will be created during the MFM. You can find it
in your mobile phone:
• Android: under this directory Android/data/com.xsens.dot.android/files/mfm
• iOS: Goto Files App On My iPhone Xsens DOT mfm
3.5 Firmware Update
Continuous firmware releases from Xsens are scheduled for new features, improvements,
and bug fixes. With Over-the-Air (OTA) firmware update function in Xsens DOT, you can
easily update the sensors to latest firmware version with Xsens DOT App.
For SDK users, device firmware update via OTA is published in v2021.0 SDK for both
Android and iOS. Refer to device firmware update sections in the SDK programming guide.
NOTES:
• Make sure App is updated to the latest version first before carrying out the OTA.
To Next Page
Loading...
