python - 在 Raspberry Pi 上找不到 ttyUSB0

Question

我正在编写一个代码，其中 pi 从 USB 串行板获取串行输入(来自 Sparkfun RFID 入门套件)，我怎样才能完成这项工作？

error

Traceback (most recent call last): File "main", line 22, in ser = s.Serial('ttyUSB0', 9600, timeout=10000) File "/usr/lib/python2.7/dist-packages/serial/serialutil.py", line 260, in init

self.open()

File "/usr/lib/python2.7/dist-packages/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 ttyUSB0: [Errno 2] No such file or >directory: 'ttyUSB0'

RFID 端口是 ttyUSB0

Answer 1

尝试将 main 中的第 22 行更改为:

 ser = s.Serial('ttyUSB0', 9600, timeout=10000)

至:

 ser = s.Serial('/dev/ttyUSB0', 9600, timeout=10000)