serial_example.py

import time
import serial
import traceback
import signal
import sys
import codecs

# configure the serial connections (the parameters differs on the device you are connecting to)
ser = serial.Serial(
    port='COM6',
    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.')

inputs=1
flag = 0
while 1 :
    try:
        # get keyboard input
            # Python 3 users
        inputs = input(">> ")
        if inputs == 'exit':
            ser.close()
            break
            # exit(0)
        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(inputs.encode('ascii'))
            out = b''
            # let's wait one second before reading output (let's give device time to answer)
            time.sleep(1)
            while ser.inWaiting() > 0:
                a = ser.read(1)
                if flag:
                    print(a.decode('ascii'))
                else:
                    print(a)
                    flag = 1
                out += a

            if out != '':
                print(out)
                # print (">>" + out)
    except:
        traceback.print_exc()