Python - decimal to integer low byte then high byte

Hello I'm a newbie with Python but I've been interested on it for 2 years. I want to make robots and I'm trying to use Python with `pyserial` on blender. But I found a problem and after 2 hours of looking for the answer in Google and in this site I found that maybe I'm retarded because I can't solve it. I think it isn't asked yet. I'm using a devantech sd84 servo controller and controling it via a USB port a serial device so I use `pyserial`. The problem is that I want Python to take a decimal value fom a user input between `400`-`2200` and I know how to do it but I need Python to show it as two bytes and send the low byte first and then the high byte. for example (pseudo code as I don't how to program it yet): ``` #ask for a decimal number between a range (the range does not really matters) x = raw_input('\tInsert a number between 400-2200:') #Insert a number between 400-2200: 1500 #show it as hex hex(x) #5dc #put it in two bytes and in this case add a zero(?) I don't know how to do that. 0xDC 0x05 #add it to a 16-bit integer to send it to the servo controller via the virtual serial port(?) i also don't know how to do that. ser.write('\xAA\xA0\x55\x01\x01\x02\xDC\x05') ``` For the interest of people who have the same controler I'll explane that 16bit integer first three bytes are sync `(\xAA\xA0\x55)` then the type of command SET_SERVO (position) (\x01) then the channel 1-84 for 1 is (\x01) then a byte count in this case 2 (\x02) and the servo position low byte and then the high byte (\xDC\x05) which nowadays I calculate with in my iPod with an app and then I insert manually hahaha I want to stop whith that stupid thing and let he compuer do it for me. Now I will post a code I made for testing purposes it mades a servo in channel 1 go troug it's full range ata different speeds and print funny things in spanish while the servo "dances" I manually calculated the positons and inserted them hahaha sounds like history for me. ``` # -*- coding: utf-8 -*- #Pablo P. 2012 "bailecillo" #mueve un servo en el canal 1 a través de todo su recorido e imprime frases mientras dicho servo "baila" import serial import time # Para cambiar de Sistema Operativo cambiar puerto #en la siguiente línea: Win COM# linux /dev/ttyS# /dev/ttyUSB# # #=un número asignado por tu sistema. port='COM3' sync='\xAA\xA0\x55' SET_SERVO='\x01' GET_SERVO='\x02' SET_SPEED='\x03' SET_MODE='\x04' GET_MODE='\x05' SET_AD_CNT='\x06' #Controla el número de canales analógicos. GET_AD_CNT='\x07' #Devuelve el número de canales analógicos actuales. GET_INPUT='\X08' # Devuelve el estado de una entrada. GET_ADC='\X09' #Devuelve el valor de un canal analógico. GET_VERSION='\x0A' #Devuelve la versión del procesador seleccionado. GET_BULK='\x15' #Usado para test en fábriica. TEST='\X16' #Usado para test en fábrica. ser = serial.Serial(port, baudrate=115200, bytesize=8, parity='N', stopbits=2,timeout=1) print "Hola! me alegro de verte." time.sleep(2) if ser.isOpen(): print "Estado del puerto: Correcto." time.sleep(1) print "Procedo a enviar modo del canal 1 y posicion(es) del mismo." time.sleep(3) print "Comprobando sistemas de baile..." ser.write(sync+SET_MODE+'\x01\x01\x19') ser.write(sync+SET_SERVO+'\x01\x02\x98\x08') #izda time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x90\x01') #derecha time.sleep(1) ser.write(sync+SET_SPEED+'\x01\x01\x10') ser.write(sync+SET_SERVO+'\x01\x02\x78\x05') #centro time.sleep(2) print "Vamos a bailar!" time.sleep(2) print "preparados..." time.sleep(1) print "listos..." time.sleep(1) print "Yaaaa!!" ser.write(sync+SET_SERVO+'\x01\x02\x98\x08') #izda time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x90\x01') #derecha time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x98\x08') #izda time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x90\x01') #derecha time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x98\x08') #izda time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x90\x01') #derecha time.sleep(3) ser.write(sync+SET_SERVO+'\x01\x02\x78\x05') #centro time.sleep(3) ser.write(sync+SET_SPEED+'\x01\x01\x00') ser.close() time.sleep(1) print "Todo el proceso completado correctamente." else: print "El puertito está cerrado" print "Hasta Luego :D" ```