Hm, some bad news @jag: I seem to have the same issue as @Mario084 - my AC is not listening on port 8888, but only on some random other port, which does not accept the token request.
Reading on the other thread, I fear that this is the case with all newer Samsung ACs and that there isn’t the possibility for a local connection, which is pretty frustrating. 
I’m hence not sure whether it really makes sense to further pursue this approach (at least for me) - it seems that this is only relevant for a few models - older ones that used XML are not supported and newer ones do not work either… I guess I have to look into the SmartThings Cloud API after all…
