How to Fix TypeError: an integer is required in python 3.4, pyserial 2.7 virtual serial port

问题

EDITED

Hello programmers Community,
I have some problems dealing with pyserial in Python 3.4 first I do not have serial ports so I have used "Virtual Serial Port Driver 7.2 by Eltima Software" to create virtual serial ports in pairs, which means that I can try to send and receive data from these ports, in my case I just create COM1 connected to COM2, then I installed Hercules SETUP utility by HW group to monitor these serial ports,

so IN THEORY IF I SEND(write) DATA IN PYTHON I CAN SEE IT IN HERCULES AS THIS LINK SHOWS https://www.youtube.com/watch?v=DItyttmpRtY

I was trying to create my own code

def mInitizalise():
 set_ser = serial.Serial(port="COM1", baudrate=9600, 
                         parity = serial.PARITY_NONE,
                         stopbits=serial.STOPBITS_ONE,
                         bytesize = serial.EIGHTBITS,
                         timeout=1)
 set_ser.close()
 set_ser.open()
 if set_ser.isOpen():
     print ('Open: ' + set_ser.portstr)
     temp = input('Type what you want to send, hit enter:\r\n')
     set_ser.write(temp)
 set_ser.close()

Buy there is an error

>>> 
>>> Open: COM1
Type what you want to send, hit enter:
hello
Exception in Tkinter callback
Traceback (most recent call last):
  File "C:\Python34\lib\idlelib\run.py", line 121, in main
    seq, request = rpc.request_queue.get(block=True, timeout=0.05)
  File "C:\Python34\lib\queue.py", line 175, in get
    raise Empty
queue.Empty

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\me\Downloads\SerialTest.py", line 25, in <module>
    ser.write(temp)
  File "C:\Python34\lib\site-packages\serial\serialwin32.py", line 283, in write
    data = to_bytes(data)
  File "C:\Python34\lib\site-packages\serial\serialutil.py", line 76, in to_bytes
    b.append(item)  # this one handles int and str for our emulation and ints for Python 3.x
TypeError: an integer is required

CAN SOMEBODY HELP ME

thanks beforehand for your help

回答1:

I figure it out, ----------tricky python--------- please pull me up, and check my other questions (with answers of course)

ok first assigning the serial port in a single line will not work as good as

#Method 1
set_ser = serial.Serial(port="COM1", baudrate=9600, parity = serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, bytesize = serial.EIGHTBITS, timeout=1)

writing it in this way

#Method 2
set_ser = serial.Serial()
set_ser.port="COM1"
set_ser.baudrate=9600
set_ser.parity = serial.PARITY_NONE
set_ser.stopbits=serial.STOPBITS_ONE
set_ser.bytesize = serial.EIGHTBITS
set_ser.timeout=1

then USE method 2

second tricky part is this line

set_ser.write(temp1.encode('utf-8'))

when Python assign the command .write IT MUST HAVE .endcode() or .encode('utf-8') or ('hex') or ('ascii') etc check this link https://docs.python.org/2/library/codecs.html#standard-encodings and this one http://www.tutorialspoint.com/python/string_encode.htm

now the final code is

def mSend():
  global set_ser, a
  set_ser = serial.Serial()
  set_ser.port="COM1"
  set_ser.baudrate=9600
  set_ser.parity = serial.PARITY_NONE
  set_ser.stopbits=serial.STOPBITS_ONE
  set_ser.bytesize = serial.EIGHTBITS
  set_ser.timeout=1
  print ('Open: ' + set_ser.portstr)
  a = 0
  while a==0:
    temp = input('write open\r\r')
    if (temp == "open"):
      set_ser.close()
      set_ser.open()
      while set_ser.isOpen():
        temp1 = input('Type what you want to send, hit enter:\r\n')
        set_ser.write(temp1.encode('utf-8'))
        if (temp1 == "close"):
          set_ser.close()
          print ('\n\nClosed')
          a = 1
    elif (temp == "close"):
      set_ser.close()
      a = 1
    else:
      print ('unless you write open or close you can not move')

a button can call this function (this code) and it will open the serial port, send data until the user write "close"

回答2:

you are on windows ... that example is for linux

try serial.Serial("COM1",9600) (its probably not actually at "com1" you will need its actual comN name)

comm ports are enumerated as COM1..99 in windows you can see what it is in the device manager

回答3:

only put integer, so COM7 set_ser.port= 7 , but actually you must do N-1 so in device manager Windows you see COM7 => pythoncode: set_ser.port= 6

来源：https://stackoverflow.com/questions/27895113/how-to-fix-typeerror-an-integer-is-required-in-python-3-4-pyserial-2-7-virtual

标签

python

python-2.7

serial-port

usb

pyserial