[CentOS] USB-serial adapter for CentOS 7

Wed Jul 8 22:53:18 UTC 2020
H <agents at meddatainc.com>

On 07/08/2020 03:02 PM, Fred Smith wrote:
> On Wed, Jul 08, 2020 at 01:40:27PM -0500, Chris Adams wrote:
>> Once upon a time, John Pierce <jhn.pierce at gmail.com> said:
>>> yes, but is it 'basic serial UPS' or is it 'enhanced serial UPS' ?    the
>>> former do NOT use the rx/tx data of the serial port at all, they ONLY use
>>> the serial port control  signals, and they probably will NOT work with a
>>> USB port because they require very specific behavior from those signals at
>>> power up and reboot times.
>> I've used various serial devices, including UPSes, via various
>> USB-to-serial adapters (Prolific PL2303 and FTDI FT2232C), and all the
>> signaling works fine.  Only issue you sometimes have is that there are
>> many cheap adapters on Amazon that claim to be Prolific or FTDI but are
>> in fact counterfeit clones - those may or may not work reliably for ANY
>> purpose.
> Another possibility for the Original Poster:
> Purchase a serial add-in card from Amazon or Newegg.
> last I noticed they weren't expensive. This avoids
> the compatibility-hell you may (or may not) encounter
> with a USB-to-serial converter.
> Fred
OK, I'll see what fits the machine best.