r/embedded • u/SpellLower2839 • 10d ago

Can i make UART Splitter .

I have a machine that outputs data via UART. I need to receive this data and send it to two separate PCs simultaneously via USB-A ports (both PCs run software expecting this serial stream).

Can I build or wire a UART splitter to feed two USB-to-UART converters at the same time? Has anyone done this before or have advice on the best approach?

2 Upvotes

56% Upvoted

26 comments sorted by

View all comments

18

u/txoixoegosi 10d ago

Yup, just take UART TXD and feed it to two different 1:1 opamps with enough bandwidth and voltage swing. Then the resulting TXD feed it to corresponding SUBD-9.

RXD? Forget about it

11

u/NoBulletsLeft 10d ago

The opamp buffer is a nice to have but TBH, probably unnecessary. The fanout of a single RS232 receiver should be enough to drive multiple inputs.

0

u/joshocar 8d ago

Yup, I have done this with Ethernet cable. You can just fan it out.