What serial adapter did you end up using? I've worked with connecting equipment that we super finicky on what was on the serial port, and after 2-3 tries, we g

What serial adapter did you end up using? I've worked with connecting equipment that we super finicky on what was on the serial port, and after 2-3 tries, we gave up and just sourced an old machine with hardware serial. We only have a few old machines left!