Errors in serial data

[Joni_Engr]

Hi,

I get errors in serial data in my python program but when I use PuTTY I get clean data without errors. I am not sure if I am writing the serial routine properly or I am missing something that introduce errors.

# Serial port config 
import serial
ser = serial.Serial("COM7", 9600)

# Send character 'A' to start the program
ser.write(bytearray('A','ascii'))

# Read line  
while True:
    bs = ser.readline()
    bs = bs.replace(b'\n', b' ').replace(b'\r', b' ')
    print(bs)

# Save data in the simple text file 
    f = open("readme.txt", "a")
    f.write( "\n\n")
    f.write(str(bs))
    f.close()