On 25/1/21 11:40 pm, Bastien Durel wrote: > Hello, > > Short-circuit pins 3-5 using my DB9 cable as Mihai Popescu said[1] > worked. > Alas, this setup prevent to plug-in the cable on the other side ^^ > > But this confirm there is an hardware problem. > > So if I understand well, I have to buy 2 of these[2], add a short- > circuit between pins in one side, and connet them with an ethernet > cable ?
That's a possibility… another no-solder option as I say is you grab a suitable serial extension lead, chop it in half, and use screw terminal blocks to bridge the right connections make the appropriate cross-overs. Done that many times at work for an ad-hoc serial cable for wiring up various RS-485 serial interfaces (Moxa U-Port 1150s, Advantec industrial serial interfaces and el cheapo Jaycar no-name USB dongles) to Modbus and proprietary serial meter networks. A bonus with this approach is that you can easily change it if needed. A downside is it's less robust as the wires usually aren't designed for those kinds of stresses, so you may find some zip tied stress relief is needed. No good for a "professional" permanent install, but fine for private use or for a quick lash-up for testing purposes. There'll be some buzzing out of wires with a multimeter to figure out which wire is which, but for DE9 cables it usually isn't a big issue. It's not like you're trying to terminate a Ultra-160 SCSI cable. If you go the DE9→RJ-45 route, make sure you use a straight-through CAT5 cable, or you'll have much head scratching when stuff doesn't work. -- Stuart Longland (aka Redhatter, VK4MSL) I haven't lost my mind... ...it's backed up on a tape somewhere.
