GPS App revised

We revised the GPS App and added some Features that were requested by Users.

It is now possible to write a logfile in csv fomat including a timestamp, that allows to evaluate the flight later and include other telemetry data into this evaluation.

A threshold can now be set, which has to be exceeded before the speed is talked. So the talking is limited to the real speed passes of the flight.

The maximum speed is written to the normal logfile if the motor is switched off.

To update to the new version, just start the VBar Control Manager and connect your tx to the pc via USB. Have fun with the new functions!