[Nut-upsuser] howto handle USB serial port keeps changing

Charles Lepple clepple at gmail.com
Wed Nov 24 12:57:38 UTC 2010

On Nov 24, 2010, at 7:27 AM, James Harper wrote:

>> Hi
>> I have a serial UPS connected using a serial2USB device. Usually it  
>> is
>> port=/dev/ttyUSB0, but occasionally i need port=/dev/ttyUSB1. How  
>> do you guys
>> handle something like this?
> Could some udev persistent device naming rules help with this? I've  
> done
> that with usb harddisks before but not serial ports.

The udev rules need something unique to latch on to, so hopefully the  
serial-to-USB device has a USB serial number, or is a different model  
or brand than the other converters that you use.

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