Provided by: libhamlib-utils_3.3-10build1_amd64 
NAME
rotctl - control antenna rotators
SYNOPSIS
rotctl [-hiIlLuV] [-m id] [-r device] [-s baud] [-t char] [-C parm=val] [-v[-Z]]
[command|-]
DESCRIPTION
Control antenna rotators.
rotctl accepts commands from the command line as well as in interactive mode if none are
provided on the command line.
Keep in mind that Hamlib is BETA level software. While a lot of backend libraries lack
complete rotator support, the basic functions are usually well supported.
Please report bugs and provide feedback at the e-mail address given in the BUGS section
below. Patches and code enhancements sent to the same address are welcome.
OPTIONS
This program follows the usual GNU command line syntax. Short options that take an
argument may have the value follow immediately or be separated by a space. Long options
starting with two dashes (‘-’) require an ‘=’ between the option and any argument.
Here is a summary of the supported options:
-m, --model=id
Select rotator model number.
See model list (use “rotctl -l”).
Note: rotctl (or third party software using the C API) will use rotator model 2 for
NET rotctl (communicating with rotctld).
-r, --rot-file=device
Use device as the file name of the port connected to the rotator.
Often a serial port, but could be a USB to serial adapter. Typically /dev/ttyS0,
/dev/ttyS1, /dev/ttyUSB0, etc. on Linux, COM1, COM2, etc. on MS Windows. The BSD
flavors and Mac OS/X have their own designations. See your system's documentation.
-s, --serial-speed=baud
Set serial speed to baud rate.
Uses maximum serial speed from rotator backend capabilities as the default.
-t, --send-cmd-term=char
Change the termination char for text protocol when using the send_cmd command.
The default value is ASCII CR (‘0x0D’). ASCII non-printing characters can be given
as the ASCII number in hexadecimal format prepended with “0x”. You may pass an
empty string for no termination char. The string “-1” tells rotctl to switch to
binary protocol. See the send_cmd command for further explanation.
Note: The semicolon (‘;’) is a common terminator for rotators that accept ASCII
character strings.
-L, --show-conf
List all configuration parameters for the rotator defined with -m above.
-C, --set-conf=parm=val[,parm=val]
Set rotator configuration parameter(s), e.g. stop_bits=2.
Use the -L option above for a list of configuration parameters for a given model
number.
-u, --dump-caps
Dump capabilities for the rotator defined with -m above and exit.
-l, --list
List all rotator model numbers defined in Hamlib and exit.
The list is sorted by model number.
Note: In Linux the list can be scrolled back using Shift-PageUp/Shift-PageDown, or
using the scrollbars of a virtual terminal in X or the cmd window in Windows. The
output can be piped to more(1) or less(1), e.g. “rotctl -l | more”.
-i, --read-history
Read previously saved command and argument history from a file (default
$HOME/.rotctl_history) for the current session.
Available when rotctl is built with Readline support (see READLINE below).
Note: To read a history file stored in another directory, set the ROTCTL_HIST_DIR
environment variable, e.g. “ROTCTL_HIST_DIR=$HOME/tmp rotctl -i”. When
ROTCTL_HIST_DIR is not set, the value of HOME is used.
-I, --save-history
Write current session (and any previous session(s), if -i option is also given)
command and argument history to a file (default $HOME/.rotctl_history) at the end
of the current session.
Complete commands with arguments are saved as a single line to be recalled and used
or edited. Available when rotctl is built with Readline support (see READLINE
below).
Note: To write a history file in another directory, set the ROTCTL_HIST_DIR
environment variable, e.g. “ROTCTL_HIST_DIR=$HOME/tmp rotctl -I”. When
ROTCTL_HIST_DIR is not set, the value of HOME is used.
-v, --verbose
Set verbose mode, cumulative (see DIAGNOSTICS below).
-Z, --debug-time-stamps
Enable time stamps for the debug messages.
Use only in combination with the -v option as it generates no output on its own.
-h, --help
Show a summary of these options and exit.
-V, --version
Show version of rotctl and exit.
- Stop option processing and read commands from standard input.
See Standard Input below.
Note: Some options may not be implemented by a given backend and will return an error.
This is most likely to occur with the --set-conf and --show-conf options.
Be aware that the backend for the rotator to be controlled, or the rotator itself may not
support some commands. In that case, the operation will fail with a Hamlib error code.
COMMANDS
Commands can be entered either as a single char, or as a long command name. The commands
are not prefixed with a dash as the options are. They may be typed in when in interactive
mode or provided as argument(s) in command line interface mode. In interactive mode
commands and their arguments may be entered on a single line:
P 123 45
Since most of the Hamlib operations have a set and a get method, an upper case letter will
often be used for a set method whereas the corresponding lower case letter refers to the
get method. Each operation also has a long name; in interactive mode, prepend a
backslash, ‘\’, to enter a long command name.
Example: Use “\get_info” in interactive mode to see the rotator's information.
Note: The backend for the rotator to be controlled, or the rotator itself may not support
some commands. In that case, the operation will fail with a Hamlib error message.
Standard Input
As an alternative to the READLINE interactive command entry or a single command for each
run, rotctl features a special option where a single dash (‘-’) may be used to read
commands from standard input (stdin). Commands must be separated by whitespace similar to
the commands given on the command line. Comments may be added using the ‘#’ character,
all text up until the end of the current line including the ‘#’ character is ignored.
A simple example:
$ cat <<.EOF. >cmds.txt
> # File of commands
> set_pos 180.0 10.0 # rotate
> pause 30 # wait for action to complete
> get_pos # query rotator
> .EOF.
$ rotctl -m 1 - <cmds.txt
set_pos 180.0 10.0
pause 30
get_pos 180.000000
10.000000
$
Rotator Commands
A summary of commands is included below (In the case of set commands the quoted italicized
string is replaced by the value in the description. In the case of get commands the
quoted italicized string is the key name of the value returned.):
Q|q, exit rotctl
Exit rotctl in interactive mode.
When rotctl is controlling the rotator directly, will close the rotator backend and
port. When rotctl is connected to rotctld (rotator model 2), the TCP/IP connection
to rotctld is closed and rotctld remains running, available for another TCP/IP
network connection.
P, set_pos 'Azimuth' 'Elevation'
Set position.
'Azimuth' and 'Elevation' are floating point values.
For example:
P 163.0 41.0
Note: If the rotator does not support setting elevation (most do not) supply “0.0”
for 'Elevation'.
p, get_pos
Get position.
'Azimuth' and 'Elevation' are returned as double precision floating point values.
M, move 'Direction' 'Speed'
Move the rotator in a specific direction at the given rate.
'Direction' is an integer defined as ‘2’ = Up, ‘4’ = Down, ‘8’ = Left, and ‘16’ =
Right.
'Speed' is an integer between 1 and 100.
Note: Not all backends that implement the move command use the Speed value. At
this time only the gs232a utilizes the Speed parameter.
S, stop
Stop the rotator.
K, park
Park the rotator.
C, set_conf 'Token' 'Value'
Set a configuration parameter.
'Token' is a string; see the -C option and the -L output.
'Value' is a string of up to 20 characters.
R, reset 'Reset'
Reset the rotator.
'Reset' accepts an integer value of ‘1’ for “Reset All”.
_, get_info
Get miscellaneous information about the rotator.
Returns 'Info' “Model Name” at present.
w, send_cmd 'Cmd'
Send a raw command string to the rotator.
ASCII CR (or --send-cmd-term value, see -t option) is appended automatically at the
end of the command for text protocols. For binary protocols, enter hexadecimal
values as “\0xAA\0xBB”.
Locator Commands
These commands offer conversions of Degrees Minutes Seconds to other formats, Maidenhead
square locator conversions and distance and azimuth conversions.
L, lonlat2loc 'Longitude' 'Latitude' 'Loc Len'
Returns the Maidenhead 'Locator' for the given 'Longitude' and 'Latitude'.
Floating point values are supplied. The precision of the returned square is
controlled by 'Loc Len' which should be an even numbered integer value between 2
and 12.
For example:
L -170.0 -85.0 12
returns:
Locator: AA55AA00AA00
l, loc2lonlat 'Locator'
Returns 'Longitude' and 'Latitude' in decimal degrees at the approximate center of
the requested Maidenhead grid square.
'Locator' can be from 2 to 12 characters in length.
West longitude is expressed as a negative value.
South latitude is expressed as a negative value.
For example:
l AA55AA00AA00
returns:
Longitude: -169.999983 Latitude: -84.999991
Note: Despite the use of double precision variables internally, some rounding error
occurs.
D, dms2dec 'Degrees' 'Minutes' 'Seconds' 'S/W'
Returns 'Dec Degrees', a signed floating point value.
'Degrees' and 'Minutes' are integer values.
'Seconds' is a floating point value.
'S/W' is a flag with ‘1’ indicating South latitude or West longitude and ‘0’ North
or East (the flag is needed as computers don't recognize a signed zero even though
only the 'Degrees' value is typically signed in DMS notation).
d, dec2dms 'Dec Degrees'
Returns 'Degrees' 'Minutes' 'Seconds' 'S/W'.
Values are as in dms2dec above.
E, dmmm2dec 'Degrees' 'Dec Minutes' 'S/W'
Returns 'Dec Degrees', a signed floating point value.
'Degrees' is an integer value.
'Dec Minutes' is a floating point value.
'S/W' is a flag as in dms2dec above.
e, dec2dmmm 'Dec Deg'
Returns 'Degrees' 'Minutes' 'S/W'.
Values are as in dmmm2dec above.
B, qrb 'Lon 1' 'Lat 1' 'Lon 2' 'Lat 2'
Returns 'Distance' and 'Azimuth'.
'Distance' is in km.
'Azimuth' is in degrees.
Supplied Lon/Lat values are signed floating point numbers.
A, a_sp2a_lp 'Short Path Deg'
Returns 'Long Path Deg'.
Both the supplied argument and returned value are floating point values within the
range of 0.00 to 360.00.
Note: Supplying a negative value will return an error message.
a, d_sp2d_lp 'Short Path km'
Returns 'Long Path km'.
Both the supplied argument and returned value are floating point values.
pause 'Seconds'
Pause for the given whole (integer) number of 'Seconds' before sending the next
command to the rotator.
READLINE
If Readline library development files are found at configure time, rotctl will be
conditonally built with Readline support for command and argument entry. Readline command
key bindings are at their defaults as described in the Readline manual
⟨https://tiswww.cwru.edu/php/chet/readline/rluserman.html⟩. rotctl sets the name “rotctl”
which can be used in Conditional Init Constructs in the Readline Init File ($HOME/.inputrc
by default) for custom keybindings unique to rotctl.
Command history is available with Readline support as described in the Readline History
manual ⟨https://tiswww.case.edu/php/chet/readline/history.html#SEC1⟩. Command and
argument strings are stored as single lines even when arguments are prompted for input
individually. Commands and arguments are not validated and are stored as typed with
values separated by a single space.
Normally session history is not saved, however, use of either of the -i/--read-history or
-I/--save-history options when starting rotctl will cause any previously saved history to
be read in and/or the current and any previous session history (assuming the -i and -I
options are given together) will be written out when rotctl is closed. Each option is
mutually exclusive, i.e. either may be given separately or in combination. This is useful
to save a set of commands and then read them later but not write the modified history for
a consistent set of test commands in interactive mode, for example.
History is stored in $HOME/.rotctl_history by default although the destination directory
may be changed by setting the ROTCTL_HIST_DIR environment variable. When ROTCTL_HIST_DIR
is unset, the value of the HOME environment variable is used instead. Only the
destination directory may be changed at this time.
If Readline support is not found at configure time the original internal command handler
is used. Readline is not used for rotctl commands entered on the command line regardless
if Readline support is built in or not.
Note: Readline support is not included in the MS Windows 32 or 64 bit binary builds
supplied by the Hamlib Project. Running rotctl on the MS Windows platform in the ‘cmd’
shell does give session command line history, however, it is not saved to disk between
sessions.
DIAGNOSTICS
The -v, --verbose option allows different levels of diagnostics to be output to stderr and
correspond to -v for BUG, -vv for ERR, -vvv for WARN, -vvvv for VERBOSE, or -vvvvv for
TRACE.
A given verbose level is useful for providing needed debugging information to the email
address below. For example, TRACE output shows all of the values sent to and received
from the radio which is very useful for radio backend library development and may be
requested by the developers.
EXIT STATUS
rotctl exits with:
0 if all operations completed normally;
1 if there was an invalid command line option or argument;
2 if an error was returned by Hamlib.
EXAMPLE
Start rotctl for RotorEZ using the first serial port on Linux:
$ rotctl -m 401 -r /dev/ttyS0
Start rotctl for RotorEZ using COM2 on MS Windows:
$ rotctl -m 401 -r COM2
Connect to a running rotctld with rotator model 2 (“NET rotctl”) on the local host and
specifying the TCP port, and querying the position:
$ rotctl -m 2 -r localhost:4533 \get_pos
BUGS
Report bugs to:
Hamlib Developer mailing list
⟨hamlib-developer@lists.sourceforge.net⟩
COPYING
This file is part of Hamlib, a project to develop a library that simplifies radio and
rotator control functions for developers of software primarily of interest to radio
amateurs and those interested in radio communications.
Copyright © 2001-2011 Stephane Fillod
Copyright © 2002-2017 the Hamlib Group (various contributors)
Copyright © 2003-2018 Nate Bargmann
This is free software; see the file COPYING for copying conditions. There is NO warranty;
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
SEE ALSO
less(1), more(1), rotctld(1), hamlib(7)
COLOPHON
Links to the Hamlib Wiki, Git repository, release archives, and daily snapshot archives:
hamlib.org ⟨http://www.hamlib.org⟩.