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Meade Telescope Serial Command Protocol

Revision 2010.10

7 October 2010

Introduction

This paper documents the Meade Telescope Serial Control Protocol utilized to remotely command and control Meade Telescopes.

This command language contains a core of common commands supported by all telescopes. Due to different implementation and

technological advances the command has extension that are not supported by all model. The differences are noted in the descriptive

text for the commands. Finally, there are a series of new commands proposed for the Autostar II. These commands are indicated in

the Appendix A at the end of this document.

Telescope Command Groupings: ------------------ Supported ------------

Command Group Command Designator Symbol AutoStar LX200<16" LX 16" AutoStar II

Alignment Query <ACK> x x x x

Alignment* A x x x x

Active Backlash $B - - - x

Reticule Control* B x p p x

Sync Control C p p p x

Distance Bars D x x x x

Fan* f - - p x

Focus Control Commands F p p p x

GPS Commands g - - - x

Get Information G x x x x

Home Position Commands* h x - x x

Hour H x x x x

Initialize Telescope I - - - x

Library L p p p x

Movement M x p x x

High Precision P x x x x

Smart Drive Control* $Q x x x x

Quit Command Q x x x x

Field De-rotator r - - p x

Rate Control R p p p x

Set Information S x x x x

Tracking Frequency T p p p x

User Format Control U p x x x

Way point (Site) W x x x x

Help Commands ? - x x -

Notes:

Commands accepted by the telescopes are shown in the table above indicated by an x entry. This means that

the telescope will accept these commands and respond with a syntactically valid response where required.

A "p" indicated only a subset of this command class is supported. Due to the differing implementations of

the telescopes, some of the commands may provide static responses or may do nothing in response to the

command. See the detailed description of the commands below to determine the exact behavior.

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Indice de contenidos

Pagina 1

Meade Telescope Serial Command ProtocolRevision 2010.107 October 2010IntroductionThis paper documents the Meade Telescope Serial Control Protocol util

Pagina 2

Meade Telescope Protocol- 10 -Autostar II & AutoStar – Performs no function always returns “1”:LsD# Select star catalog D, an ASCII integer where

Pagina 3

Meade Telescope Protocol- 11 -“LOW PRECISION” Current setting after this command.$Q – Smart Drive Control$Q# Toggles Smart Drive PEC on and off for bo

Pagina 4

Meade Telescope Protocol- 12 -Returns:Nothing:Qe# Halt eastward SlewsReturns: Nothing:Qn# Halt northward SlewsReturns: Nothing:Qs# Halt southward Sl

Pagina 5

Meade Telescope Protocol- 13 -:RgSS.S#Set guide rate to +/- SS.S to arc seconds per second. This rate is added to or subtracted from the current trac

Pagina 6

Meade Telescope Protocol- 14 -Returns:0 – Invalid1 - Valid:SFNNN#Set FIELD/IDENTIFY field diameter to NNN arc minutes.Returns:0 – Invalid1 - Valid:SgD

Pagina 7

Meade Telescope Protocol- 15 -0 – Invalid1 - Valid:SO<string>#Set site 3’s name to be <string>. LX200s only accept 3 character strings. Ot

Pagina 8

Meade Telescope Protocol- 16 -:StsDD*MM#Sets the current site latitude to sDD*MM#Returns:0 – Invalid1 - Valid:STdddd.ddddddd# [Autostar II Only]Sets t

Pagina 9

Meade Telescope Protocol- 17 -Returns: Nothing:TM# Select custom tracking rate [ no-op in Autostar II]Returns: Nothing:TQ# Selects sidereal tracking r

Pagina 10

Meade Telescope Protocol- 18 -Appendix A: Autostar II Command Extensions:Aa# Automatically align scope:CL# Sync on Selenographic Coordinates:CX# Smar

Pagina 11

Meade Telescope Protocol- 19 -:SpB<n><n># Set backlash:SpH<n><n># Set home:SpS<n><n><n># Set Seneor offsets:

Pagina 12

Meade Telescope Protocol- 2 -ACK - Alignment QueryACK <0x06> Query of alignment mounting mode.Returns: A If scope in AltAz Mod

Pagina 13

Meade Telescope Protocol- 3 -:CM# Synchronizes the telescope's position with the currently selected database object's coordinates.

Pagina 14

Meade Telescope Protocol- 4 -1 if focuser is moving:FC<n/s/e/w> #TBD-Max/RCX- collimate command. Starts the corrector plate tilting in the speci

Pagina 15

Meade Telescope Protocol- 5 -During GPS update, normal handbox operations are interrupted. [Autostar II only]Returns: ‘0’ In the event that the user i

Pagina 16

Meade Telescope Protocol- 6 -:Gf# Get Browse Faint Magnitude LimitReturns: sMM.M#The magnitude or the brightest object to be returned from the telesco

Pagina 17

Meade Telescope Protocol- 7 -A ‘#’ terminated string with the name of the requested site.:GpB# Get backlash values [Autostar and Autostar II]Returns:

Pagina 18

Meade Telescope Protocol- 8 -Returns: dd.d#:GVP# Get Telescope Product NameReturns: <string>#:GVT# Get Telescope Firmware Timereturns: HH:MM:SS#

Pagina 19

Meade Telescope Protocol- 9 -:hW# Autostar II Only: Wake up sleeping telescope.:h?# Autostar, Autostar II and LX 16” Query Home StatusReturns:0 Home S