Hello,
You do not need any device to track odometer. It can be done by configuring your device:
In Odometer Value (km) field input your current odometer settings and save the configuration in your device.
Now, the device will use this value as a start point and will calculate odometer by using GNSS (because you are only using FMU130 device)
No need to reconfigure the device every time.
Hope that helps.
Best regards.