Some more observations. As every PRINT and PRINTLN generate a "segment" "on the line" I have tryed to reduce the numbers of these statement and instead put in as many chars as possible per PRINT, about 10 to 20. But there seems to be some limitation in the code or the Arduino HW because I got some hang up in the communication at some point. Very strange, I reduce the number of PRINT but more data per PRINT up to some limit ???
Thomas :-/