UTF-8 error

this corrects the error :
UnicodeDecodeError: 'utf8' codec can't decode byte 0xff in position 0: invalid start byte

Author: s4mdf0o1

arduino/arduino.py

@@ -1,4 +1,5 @@
 #!/usr/bin/env python
+# -*- coding: utf-8 -*-
 
 import serial