RS-232 Connection DELL 4220 Projector

projector.py

import serial

BAUDRATE=19200

class Projector:
	
	def __init__(self,port_name,timeout=1):
		self.__serial = serial.Serial()
		self.__serial.port = port_name
		self.__serial.timeout = timeout
		self.__serial.baudrate= BAUDRATE
		
	def is_open_connection(self):
		return self.__serial.isOpen()
		
	def open_connection(self):
		self.__serial.open()
		
	def close_connection(self):
		self.__serial.close();
		
	def send_command(command = Commands.NONE):
		self.__serial.write(command)

class Commands:
	
	NONE = []
	
	POWER_ON = [0xBE,0xEF,0x10,0x05,0x00,0xC6,0xFF,0x11,0x11,0x01,0x00,0x01]
	POWER_OFF = [0xBE,0xEF,0x10,0x05,0x00,0x0C,0x3E,0x11,0x11,0x01,0x00,0x18]
	
	HIDE_ON  = [0xBE,0xEF,0x10,0x05,0x00,0x02,0x7E,0x11,0x11,0x01,0x00,0x0F]
	HIDE_OFF = [0xBE,0xEF,0x10,0x05,0x00,0xED,0x3F,0x11,0x11,0x01,0x00,0x64]
	
	FREEZE_ON = [0xBE,0xEF,0x10,0x05,0x00,0xC2,0xBF,0x11,0x11,0x01,0x00,0x0E]
	FREEZE_OFF = [0xBE,0xEF,0x10,0x05,0x00,0xEF,0xBF,0x11,0x11,0x01,0x00,0x62]
	
	VGA_ANALOG_A = [0xBE,0xEF,0x10,0x05,0x00,0xCC,0xFF,0x11,0x11,0x01,0x00,0x19]
	VGA_ANALOG_B = [0xBE,0xEF,0x10,0x05,0x00,0x28,0xFE,0x11,0x11,0x01,0x00,0x69]
	
	PROJECTOR_FRONT = [0xBE,0xEF,0x10,0x06,0x00,0x9A,0xE3,0x11,0x11,0x00,0x00,0x33,0x01]
	PROJECTOR_FRONT_CEILING = [0xBE,0xEF,0x10,0x06,0x00,0x9A,0xE3,0x11,0x11,0x00,0x00,0x33,0x02]
	PROJECTOR_REAR = [0xBE,0xEF,0x10,0x06,0x00,0x9A,0xE3,0x11,0x11,0x00,0x00,0x33,0x03]
	PROJECTOR_REAR_CEILING = [0xBE,0xEF,0x10,0x06,0x00,0x9A,0xE3,0x11,0x11,0x00,0x00,0x33,0x04]