RS232 Relay

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This page was last edited on 2 June 2017, at 23:33.

There is this RS232 Relay with 'www.iorelay.com' printed on the PCB.

I believe the manual for it is this: https://s3.amazonaws.com/assets.controlanything.com/manuals/R2X.PDF

On linux, I tried to do this to no avail:

# printf \\$(printf '%03o' 254) > /dev/ttyS0 ; printf \\$(printf '%03o' 4) > /dev/ttyS0