Wildbill,
Thanks for the info and concerns.
Somewhere in all the debugging at 115200 bps setting at both sides there was no communication anymore.
Did not know the cause but logical the first thing I did was step down in bps level.
So I tried 57600 bps and that was the speed that worked.
Past days are done on 9600.
Will try once again this evening. Let you know the result.
Paco