"Locking", freezing configuration

Hi All,

is it possible to lock a certain configuration in a way that to change it requires a PIN code or another way to unlock? Maybe also hiding most of the buttons of the configuration menu in QGroundControl.
This is needed when you pass a quadcopter to another non-tech skilled person which could make unpredictable changes to configuration and parameters

Simply create a custom interface allowing the modification of a subset of parameters => Mavlink.

Thanks for reply, can you give me a little bit more details? Should i use mavlink for that?
I would like to freeze configuration at FMU level, not (only) app because otherwise user could change config using a different app like mission planner.

If you want more than that and block on FMU level, just make a middleware on the firmware itself. You have to do it yourself.