adaptions to python3

send_to_arduino.py

@@ -105,13 +105,14 @@ def main(argv):
     to_send.append('M05')
     #print max_point
     if any (new_point>np.array([[3200],[1000]])):
-        print 'Image too large! 3200 x 1000 is the maximum!'
+        print('Image too large! 3200 x 1000 is the maximum!')
     ser = serial.Serial(port=serialport,baudrate=2000000,timeout=10)
     widgets = [Percentage(), ' ', Bar(marker=RotatingMarker()),' ', ETA()]
     pbar = ProgressBar(widgets=widgets).start()
     for line in pbar(to_send):
         #print line
-        ser.write('%s\n'%line)
+        ser_cmd = '%s\n'%line
+        ser.write(ser_cmd.encode())
         ser.readline()
     ser.close()