param_server: allow to change parameter internally

[dayjaby]

Allow a param_server to change a parameter that it is providing.

[julianoes]

I think this makes sense. The tricky thing is that you're supposed to "provide" all params on init, before any mavlink traffic happens, and the number of params can't change later.

[JonasVautherin]

The tricky thing is that you're supposed to "provide" all params on init, before any mavlink traffic happens

Oh so that can't work with the language bindings, right?

[dayjaby]

Language bindings should be fine. So a python mavsdk app for example can represent an entire mavlink component, using the param_server plugin to provide all the parameters. If something happens within the component, the same plugin should be able to be used to "change" one of these parameters.