Good news ... Im very close to a stable version ... thx to help from the library developers ...
Im pretty sure that this will work now.
Going through all the erros myself ... with no documentation .. I got a good understanding what is going on now ....
Basicly if your device has a old fimware preinstalled and you didnt update it.... you do not fall victim to the authentication stuff since that got introduced in later firmware ....
Now I will have to adjust things accordingly ... I could create 2 different plugins ... or I create 1 which switches and works for both older an newer ....
which might be risky ...
Anyway this is just thinking ahead for years to come ....
I will upload smth that works for "now" once I have this last tiny issue fixed ....
Will be a version that works for the rm3 mini and rm pro plus

Will have smth to test in the coming week I think