Python3 compatibility

hdmi_matrix_controller.py

@@ -85,7 +85,8 @@ def _generate_cmd(cmd_code, arg1=0, arg2=0):
         data[2] = arg2
         cmd = _CMD_HEADER + cmd_code + data
         HdmiMatrixController._append_checksum(cmd)
-        return ''.join(chr(c) for c in cmd)
+        serial.iterbytes(cmd)
+        return cmd
 
     @staticmethod
     def _append_checksum(cmd):
@@ -336,13 +337,11 @@ def _send_cmd(self, cmd):
             HdmiMatrixControllerException: Error writing to serial.
         """
         try:
-            logging.debug('Sending cmd: %s.',
-                          ' '.join(c.encode('hex') for c in cmd))
+            logging.debug('Sending cmd: %s.',' '.join(hex(c) for c in cmd))
             self._ser.write(cmd)
         except (serial.SerialException, serial.SerialTimeoutException) as exception:
             logging.error('Error writing to serial: %s', str(exception))
             raise HdmiMatrixControllerException(exception, 'Error writing to serial.')
-
     def _receive_response(self):
         """Reads and validates a response.
 

setport.py

@@ -0,0 +1,14 @@
+import serial
+import sys
+
+import hdmi_matrix_controller
+
+BAUD_RATE = 19200
+TIMEOUT = 10
+
+serial_dev = serial.Serial('/dev/ttyUSB1', baudrate=BAUD_RATE, timeout=TIMEOUT)
+controller = hdmi_matrix_controller.HdmiMatrixController(serial_dev)
+
+#controller.set_beep(0)
+controller.change_port(int(sys.argv[1:][0]), int(sys.argv[1:][1]))
+print("Done")