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Data transfer with Lenovo


NDubbs Feb 27, 2012 07:54 PM

Hello,

I've noticed that the data transfer rate when using a Lenovo thinkpad with serial to usb cables is incredibly slow. Anyone else have this problem? We've experienced this with multiple laptop/logger configurations.


Nico Mar 3, 2012 05:00 PM

Did you check the baudrate settings for the usb-serial bridge?

Windows..
Start > Control Panel > Device Manager

Search in the tree for 'Ports (COM & LPT)' and right click the USB-serial bridge you're using > select 'Properties'.

Under 'Port Settings'>'Advanced' set it to the max baudrate your datalogger is able towork with.

Campbell..
Next place to look at would be the Campbell software..
In Loggernet > Setup Screen I can set the baudrate for the COM-port being utilized.


personal experience: Lenovo Ideapad S10e (and other machines) with diverse USB-serial adapters (ATEN, etc.) go as high as 115,200 baud with CR3k, CR1k and CR800

* Last updated by: Nico on 3/3/2012 @ 10:04 AM *


NDubbs Mar 10, 2012 04:08 PM

Thanks Nico,

I tried your suggestion and it worked momentarily, as I could see data refreshing much faster in the table display, however after a few seconds it would lock up and crash RTDAQ. I'm usingn a CR5000, not sure if that makes a difference or not. I will have to keep searching for something else that is causing this hangup.


Dana Mar 12, 2012 08:15 PM

Make sure you are using the most recent driver for the USB to serial cable. If you still experience problems, try a cable from a different manufacturer.

I have found them to be pretty flaky, and what works with one piece of hardware may not necessarily work well with another piece of hardware.

Dana W.

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