AVR-Chat

On Wed, 2010-02-24 at 05:06 +0000, Donald H wrote:
> 
> --- In AVR-Chat@yahoogroups.com, Leon Heller <leon355@...> wrote:
> >
> > On 23/02/2010 23:00, rsimonus wrote:
> > > I am curious about USB to serial db9 cable. I am planning to buy one. I want to know if any USB to serial 9pin cable which will work with any device and my old Sony Clie or it is depend on brand and model? I see walmart sell those for $9 dollars.
> > 
> > The ones with an FTDI chip usually work OK. There are some with a 
> > cheaper chip (I forget what they are called, something beginning with 
> > P?) but they often have problems. 
> 
> Prolific PL-2303
> 
> These have been around for a long time and work very well.
> 
> One thing you have to understand, after loading the driver for the first time, the USB dongle will be assigned a serial port number by Windows.
> 
> If you plug the same dongle into another USB port on the same computer, the COMx port number will change. But if you plug it back into the original USB port, the original number will be assigned.
> 
> This is Windows, not the dongle.
> 
> I have not found any USB-2-serial dongle that will keep the COMx number the same across USB ports.
> 


The last time I was forced to use Windows, I was able to assign a fixed
COMx name for my USB serial adapter. Something like:

Control Panel/System/Hardware/Device Manager
/Ports/<port>/properties/Port Settings/Advanced.../COM Port Number