add_library('serial')

port = "COM5"

def setup():
    size(512, 512)
    #setup the serial port
    print Serial.list()
    LF = 10
    print "Connecting to ", port
    myPort = Serial(this, port, 115200)
    myPort.bufferUntil(LF)
    
x, y = -1, -1

def draw():
    global x, y
    if x >= 0 and y >= 0:
        point(x, y)

def serialEvent(evt):
    xy = evt.readString().strip().split()
    if len(xy) == 2:
        global x, y
        x, y = int(xy[0])/2, int(xy[1])/2