On 2006-07-24, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: >> Logs of the serial traffic would be helpful. > > Here they are. First a log of the traffic generated by the > T-logger GUI program, abtained with Portmon.
I try to avoid Windows as much as humanly possible, but one thing that appears to be different is that Tlogger clears RTS and your program sets it. Try clearing RTS in your program when you set up the serial port. If clearing RTS doesn't help, I guess I'd try different flow control settings (try enabling and disabling RTS/CTS flow control). Since you're dealing with binary data, make sure that Xon/Xoff flow control is disabled. -- Grant Edwards grante Yow! What's the MATTER at Sid?... Is your BEVERAGE visi.com unsatisfactory? -- http://mail.python.org/mailman/listinfo/python-list