Python – pySerial write() won’t take the string

pyserialpython

Using Python 3.3 and pySerial for serial communications.

I'm trying to write a command to my COM PORT but the write method won't take my string. (Most of the code is from here Full examples of using pySerial package

What's going on?

import time
import serial


ser = serial.Serial(
    port='\\\\.\\COM4',
    baudrate=115200,
    parity=serial.PARITY_ODD,
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS
)
if ser.isOpen():
    ser.close()
ser.open()
ser.isOpen()

ser.write("%01#RDD0010000107**\r")
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(40)

if out != '':
    print(">>" + out)


ser.close()

Error is at ser.write("%01#RDD0010000107**\r") where it gets
Traceback is like this
data = to_bytes(data)
b.append(item)
TypeError: an integer is required.

Best Answer

It turns out that the string needed to be turned into a bytearray and to do this I editted the code to 

ser.write("%01#RDD0010000107**\r".encode())

This solved the problem

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