我正在尝试运行PySerial文档中的这个示例程序来打开串行端口。来源:http://pyserial.sourceforge.net/shortintro.html我尝试在Python2.7和3.4版本中运行代码,但仍然得到相同的错误。
>>> import serial
>>> ser = serial.Serial(0) # open first serial port
>>> print ser.name # check which port was really used
>>> ser.write("hello") # write a string
>>> ser.close() # close port
在运行第二行代码后,我得到了以下错误:
Traceback (most recent call last):
File "<pyshell#2>", line 1, in <module>
ser = serial.Serial(0)
File "C:\Python27\lib\site-packages\serial\serialwin32.py", line 38, in __init__
SerialBase.__init__(self, *args, **kwargs)
File "C:\Python27\lib\site-packages\serial\serialutil.py", line 282, in __init__
self.open()
File "C:\Python27\lib\site-packages\serial\serialwin32.py", line 66, in open
raise SerialException("could not open port %r: %r" % (self.portstr, ctypes.WinError()))
SerialException: could not open port 'COM1': WindowsError(2, 'The system cannot find the file specified.')
发布于 2015-05-28 12:37:02
听起来COM1是不可用的(它不存在或者已经被使用了)。我制作了这个小脚本,用来列出可用的COM端口。
import serial
ser=serial.Serial()
for ns in xrange(101):
try:
ser.port=ns
ser.open()
print "COM"+str(ns+1)+" available"
ser.close()
except serial.SerialException:
print "COM"+str(ns+1)+" NOT available"
请记住,COM端口号是传递给serial +1的数字(serial.Serial(0)打开COM1,serial.Serial(1)打开COM2,依此类推)
https://stackoverflow.com/questions/27749025
复制相似问题