RS232 Relay: Difference between revisions
From Leo's Notes
This page was last edited on 15 June 2020, at 00:44.
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I believe the manual for it is this: https://s3.amazonaws.com/assets.controlanything.com/manuals/R2X.PDF | I believe the manual for it is this: https://s3.amazonaws.com/assets.controlanything.com/manuals/R2X.PDF | ||
On Linux, | On Linux, to turn the relay off and on via serial: | ||
{{highlight|lang=terminal|code= | {{highlight|lang=terminal|code= | ||
## Ensure serial is at 9600 baud | |||
# stty -F /dev/ttyS0 9600 | # stty -F /dev/ttyS0 9600 | ||
## Toggle it | |||
# while true ; do echo -e "\xFE\x01" > /dev/ttyS0 ; sleep 1 ; echo -e "\xFE\x00" > /dev/ttyS0 ; sleep 1 ; done | # while true ; do echo -e "\xFE\x01" > /dev/ttyS0 ; sleep 1 ; echo -e "\xFE\x00" > /dev/ttyS0 ; sleep 1 ; done | ||
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# printf \\$(printf '%03o' 0) > /dev/ttyS0 | # printf \\$(printf '%03o' 0) > /dev/ttyS0 | ||
}} | }} | ||
{{Navbox Tinkering}}[[Category:Tinkering]] | |||
Latest revision as of 00:44, 15 June 2020
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, to turn the relay off and on via serial:
## Ensure serial is at 9600 baud
# stty -F /dev/ttyS0 9600
## Toggle it
# while true ; do echo -e "\xFE\x01" > /dev/ttyS0 ; sleep 1 ; echo -e "\xFE\x00" > /dev/ttyS0 ; sleep 1 ; done
## You can also use printf
# printf \\$(printf '%03o' 254) > /dev/ttyS0
# printf \\$(printf '%03o' 0) > /dev/ttyS0