THX, Chris. GOT IT!
In this RaspberryVersion on Git you only must change the Line in AR2.py where the BAUDRATE is defined. Actual it is at 9600baud but Arduino Communicates with 115200baud.
If i changed it, my Arduino talks to the Raspberry else you got no Communication.
def setCom():
global ser
port = "/dev/ttyACM0" #+ comPortEntryField.get()
baud = 115200
ser = serial.Serial(port, baud)
Okay, lets build some Touchscreen Handheld Device :-D.
My plan is it to downsize your Main Softwarevisualisation for a Touchscreen with buttons like Orientation changes from Base to Tool to SingleAxis.
Greetings Daniel