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Can someone please show me a full python sample code that uses pyserial, i have the package and am wondering how to send the AT commands and read them back!
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PySerial is a library which provides support for serial connections ("RS-232") over a variety of different devices: old-style serial ports, Bluetooth dongles, infra-red ports, and so on. It also supports remote serial ports via RFC 2217 (since V2. 5).
Yes serial port hardware is full duplex. Yes, you can use threads to do Rx and Tx at the same time. Alternatively, you can use a single thread loop that does reads with a short timeout and alternates between reading and writing.
Blog post Serial RS232 connections in Python
import time import serial # configure the serial connections (the parameters differs on the device you are connecting to) ser = serial.Serial( port='/dev/ttyUSB1', baudrate=9600, parity=serial.PARITY_ODD, stopbits=serial.STOPBITS_TWO, bytesize=serial.SEVENBITS ) ser.isOpen() print 'Enter your commands below.\r\nInsert "exit" to leave the application.' input=1 while 1 : # get keyboard input input = raw_input(">> ") # Python 3 users # input = input(">> ") if input == 'exit': ser.close() exit() else: # send the character to the device # (note that I happend a \r\n carriage return and line feed to the characters - this is requested by my device) ser.write(input + '\r\n') out = '' # let's wait one second before reading output (let's give device time to answer) time.sleep(1) while ser.inWaiting() > 0: out += ser.read(1) if out != '': print ">>" + out 
import serial ser = serial.Serial(0) # open first serial port print ser.portstr # check which port was really used ser.write("hello") # write a string ser.close() # close port use https://pythonhosted.org/pyserial/ for more examples
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