python串口

Question

我想用python和我的串口通信。我为linux安装了pyserial和uspp：

import serial
ser = serial.Serial('/dev/pts/1', 19200, timeout=1)
print ser.portstr       #check which port was really used
ser.write("hello")      #write a string
ser.close()             #

它会给出以下错误：

Traceback (most recent call last):
  File "poi.py", line 5, in <module>
    ser.open()   
  File "/usr/local/lib/python2.6/dist-packages/pyserial-2.5-py2.6.egg/serial/serialposix.py", line 276, in open
    raise SerialException("could not open port %s: %s" % (self._port, msg))
serial.serialutil.SerialException: could not open port /dev/tyUSB1: [Errno 2] No such file or directory: '/dev/tyUSB1'

Answer 1

如果您正在使用linux，通常将串行端口命名为/dev/tty*；只需将*替换为s和端口号，如/dev/ttyS1。我使用的是一台通过usb串口通信的arduino，它是/dev/ttyUSB0。