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I am successfully using SER2NET on a Raspberry Pi to translate RS-232 data to Ethernet. But I would like to "watch" the data coming from the serial port for a certain string, and if there is a match, I would like to send a "control string" back out the RS-232 port. It doesn't matter if the Ethernet port "sees" this returned string or not.

I'm running at 115K baud and the RPi is doing a lot of other things simultaneously, so whatever approach I use cannot use a lot of processor time. Does anyone know of a good way to do this?

  • Your question title ("tee or wedge") is interesting. What do you mean by that?  Do you already have an idea of how this can be done? – G-Man Dec 22 '18 at 20:46

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