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 -- ---- Fred Smith -- fredex at fcshome.stoneham.ma.us ----------------------------- I can do all things through Christ who strengthens me. ------------------------------ Philippians 4:13 -------------------------------