Robin2:
You have not posted your program so I cannot offer any solution....R
Not yet in a position to ask the right questions. Still working on the code and have some things to try.
I was getting tired of manually changing the library so asked about changing the buffer size. Now using 2 versions of the IDEs. One with the original buffer size. One with a modified buffer size.
If you are interested. It is an update for www.dropcontroller.com
Interestingly, the original was developed in IDE1.6.3 and I didn't have any issues. I am now using 1.8.5 and have problems.