
Gemini Users Manual 100
8.4 Serial Line Protocol
The Gemini system supports a subset of the Meade®
2
LX200 Command Set making it
compatible with many planetarium programs. Programs and drivers (such as the Gemini
ASCOM driver) which specifically support Gemini can make use of these LX200 style
commands as well as Gemini extensions described below. From Level 2 up, nearly all
Gemini parameters and settings can be downloaded or uploaded using the native
command set described at the end of the section.
Syntax: values in <> are (to be) replaced by actual values. Curled brackets {} show
alternative characters.
Upon completion, ASCII characters or strings are returned, if indicated.
Command Returns Remarks
0x06 (ACK char)
B# while the initial
startup message is
being displayed (new
in L4),
b# while waiting for
the selection of the
Startup Mode,
S# during a Cold Start
(new in L4) or
G# after completed
startup.
Usable for testing the serial link
and determining the type of mount
(German equatorial).
During Startup, with a "b#" being
returned, the PC can select the
startup mode by sending a
• bC# for selecting the Cold
Start,
• bW# for selecting the
Warm Start and
• bR# for selecting the
Warm Restart.
Synchronize
:Cm#
No object!# or
<object name>#
The string "No object!#" is
returned if the mount is not
aligned or no object was selected,
otherwise the name of the selected
object used is returned.
This command does an
"Additional Alignment",
(re)calculating the pointing model
parameters and synchronizing to
the position given.
:CM# No object!# or The string "No object!#" is
2
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