The sendBreak function is making things very difficult for me. On windows, it blocks until the break is finished. I need to set the break, then change other signals like dtr, or rts while the break is still happening. This would be very trick since sendBreak blocks.
A setBreak funtion would make things so much easier. For windows I attached my updated serialwin32.py file including my setBreak function. I tested this and it works fine for me.
I will also attach a posix version in another request.