[Bug 543331] Re: pyserial not communicating with /dev/ttyUSB0

[Lawrence]

I have a similar issue on Ubuntu. Communicating with a /dev/ttyUSB
device works with minicom, but it doesn't with PySerial with the same
settings. It works for about 20% of the time, while other times it
messes with the data, or it hangs indefinitelly/until timeout.

There doesn't seem to be any development regarding this bug for the past
few years.

The solution from billmania didn't work for me, my device requires no
flow control whatsoever.

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https://bugs.launchpad.net/bugs/543331

Title:
  pyserial not communicating with /dev/ttyUSB0

Status in “pyserial” package in Ubuntu:
  Confirmed

Bug description:
  I have a LinkUSB dongle. When this device is attached to the notebook, the file /dev/ttyUSB0 is created. If I use minicom to interact with this device, all works correctly.
  However, the following does not work correctly:

  from serial import *
  l = Serial(port='/dev/ttyUSB0', baudrate=9600)
  l.write('r')
  print l.read(3)

  
  The read() statement should return '\r\nP' but instead never returns.

  It seems as if the pyserial methods aren't actually writing to the
  serial port.

  The source package is python-serial

  ProblemType: Bug
  Architecture: i386
  Date: Sun Mar 21 06:08:45 2010
  DistroRelease: Ubuntu 9.10
  Package: python-serial 2.3-1
  PackageArchitecture: all
  ProcEnviron:
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-14.48-generic-pae
  SourcePackage: pyserial
  Uname: Linux 2.6.31-14-generic-pae i686

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