.TH "usbrelay" 1 "24 Jan 2022" "usbrelay"
.SH NAME
usbrelay \- control or query USB HID relays

.SH SYNOPSIS
.B usbrelay
[OPTION...]
[ACTION...]

.SH DESCRIPTION
.B usbrelay
allows for querying and setting the state of USB HID electrical relays.
If no ACTION is passed, the state of all relays is printed to stdout.
RELID_N=[0|1] sets the N-th relay on module RELID to off or on. 

Multiple actions can be performed with one command

eg:

usbrelay REL0A_1=0 REL0A_2=1 REL0B_2=0...

The Relay module ID can be changed on DCTTECH relays:
RELID_0=NEWID sets the relay RELID to NEWID

.SH OPTIONS
.TP
.BR \-d ", " \-\-debug
Produce debugging output
.TP
.BR \-q ", " \-\-quiet
Suppress output
.TP
.BR \-? ", " \-\-help
Print the help menu
.TP
.BR \-\-usage
Print a usage description
.TP
.BR \-V ", " \-\-version
Print the program version
.SH SEE ALSO
.br
/usr/share/doc/usbrelay/README.md.gz