On Nov 30, 7:41 pm, Grant Edwards <inva...@invalid.invalid> wrote: > On 2009-11-30, a b <putumutu...@gmail.com> wrote: > > > I have a pain in the a** problem with pyserial- it works 90% > > of time but on the 10% of time it thorows and termios.error > > exception with the value (5, 'Input/output error') and i > > cannot get rid of it :( > > Sounds like faulty converter or a bug in the device driver to > me. > > > The system works as follows: > > A device sends out rs485 data -> rs485 to rs232 converter converts it - > >> an rs232->usb cable attatched to a computer reads the data. Until > > now it hasn't bothered me too much since it hasn't been a lot > > of data (every time i get this exception i unload the pl2303 > > module from kernel, then reload it, open the com port > > Does that get rid of the error? If so, then it's definitely a > problem with the converter or device-driver. > > > and hope it won't happen soon). But now the amount of data is > > getting bigger and the exceptions in the log are quite > > bothering already so if anyone has a good idea what could > > affect it i'd be very glad... oh and the settings for the port > > opening are: self.ser = serial.Serial(self.port, > > self.baudrate, rtscts=0, xonxoff=0, timeout=0) > > Unless you want to try to troubleshoot the device driver and > USB traffic, the only suggestion I have is to try different > converters and/or different versions of the driver. > > -- > Grant Edwards grante Yow! If Robert Di Niro > at assassinates Walter Slezak, > visi.com will Jodie Foster marry > Bonzo??
Try to use Portmon to see if your data is sent correctly.(if not, then its the cable/converter) http://technet.microsoft.com/en-us/sysinternals/bb896644.aspx or another port monitor tool for other OS. -- http://mail.python.org/mailman/listinfo/python-list
