Windows Users

ASCOM: if not already installed, please download and install the ASCOM platform for the Seletek software to work, even if you plan to use it stand-alone. It's free and it's great.

Linux & OSX Users

INDIGO & INDIlib drivers available.

Seletek's current version:

  • Software 4.8

  • Firmware 5.1.0

Last update: Dec 5, 2019

Quick links to current packages:

Valid for all controllers and Windows versions.

Quick links to current firmware:

Valid for all controllers and Windows versions.

Seletek’s version history

*  Software 4.8

– Added support for the Limpet
– Installer: add firewall rule to enable network connection

Firmware 5.1.0

– Fixed the temperature readings while the motor is moving)

Software 4.7.9 / Firmware 5.0.1 – Platypus Only!

Network connection improvements:

– DHCP support (automatic network address)

– NETBIOS name (that is, network name – you can connect with “Platypus” by name)

– Small web server (http://platypus) – with support for sending commands (check /seletek/SeletekDevelopersGuide.pdf )

– Some other internal improvements

– Only “Main” program changed, to install software, please use this link: /seletek/current/Seletek.exe and replace your current one. For the Firmware, use the quick link below

Software 4.7:


– Improved installer, now with option to select which programs should be installed

– COM port can be selected / forced to address the problem of some 64Bit windows not being able to connect unless run as administrator.

– PinByPin quite improved, can work with absolute temperatures now and also display correct pin numbers for the “2” generation of controllers.

– Some other internal fixes and improvements.

Software 4.5.1 (Jan 14, 2014):

Just 2 changes:

– New installer, fixes all issues with TheSkyX and other programs in Windows 7/8

– Main program will now exit regardless if any satellite program is still active, to avoid the situation where “a program is preventing Windows from closing…”

Software 4.5 / Firmware 3.3 released for all controllers (Dec 23, 2013):

Improvements in 3 main areas:


– Acceleration of motor, speeds specified in microseconds

– Backlash support

– Definition of “forbidden zone” to impede rotation to certain angles for complex setups

– Minor interface changes


– Speed specified in microseconds

– Min temperature delta to apply correction specified in steps


– Support for analog sensors (such as the Sharp distance sensor)

– Much easier script programming

– Option to request confirmation on relay change

– Important: the software needs the latest (3.3) firmware to run

4.0 software news (12/March/2012):

Support for our new Platypus controllers and some improvements for Armadillo users.

– Three simultaneous devices (platypus only)

– Firefly control for observatory automation (all controllers)

– Watchdog capabilities (for instance, resets the PC if it’s frozen…) (all controllers)

– Rotator(s) default settings for VSI’s Motorized Zerotator (all controllers)

– TCP/IP (Internet) communications (platypus only)

– The software will work with older firmwares (2.2), but for the new advanced options a firmware upgrade will be needed

3.5 software news (many!):

– Added sensor monitor from main program

– Added the ability to define commands to run on startup (please check the user’s manual currently being updated and the included “initcmds.ini” sample file included)

– Focuser now supports “Set position” (no motion), “Goto profile points” (named points), and backlash (needs firmware 2.2 to work)

– Smaller configuration window (focuser) for users with netbooks

– PinByPin does not cut off power when at the configuration window

– FilterWheel now includes a full stepper configuration

– Limit switches now possible to configure thanks to the init commands

3.1 software news:

– Added “slow pwm” support to PinByPin (thanks David!)

– Camera rotator now fully mature

– Added “reverse button meaning” for Focuser (so In means Out etc… for “reversed” focusers…)

– Fixed some communication problems (dropouts) and minor interface details (decimal point at some places…)

– … and finished a few minor details (full multilanguage support, window mode on open…)

– a big thanks to all who helped ruling out every problem in the 3.0 R.C.

3.0 Initial release

– Too many changes to list here, there’s a full page for this new version and also a step by step migration guide.

– Migration tool: download

– New software: download (06/Aug/2010)

– Same software, now with Rotator support (beta): download (08/Aug/2010)

– New firmware 2.1: for the Armadillo controller and for the original Seletek controller (01/Dec/10)

– Just in case (not needed as it is included in the migration tool): bootloader firmware, for the Armadillo and for the original Seletek.

– And finally, latest drivers release (ver. 2.1, last update 11/Aug/2010 – repackaged and minor bug fixing for the Armadillo) Will work with Windows XP, Vista, 7, 32 and 64 bit versions. Windows 2000 driver will be available upon request.

– Older versions (pre 3.0) archive:

– Windows VISTA and Windows 7 users: the first time you run any ASCOM-aware utility program (such as Focuser, FocuserEXP, FilterWheel, FilterWheelEXP) you must execute it with explicit administrator rights: right click over the program icon, select “Run as administrator”.

– Drivers: whatever your software version, please download the drivers above (11/Aug/2010) unless running Windows 2000 (those drivers will be made available upon request)

* v. 2.5.1 – 21/Oct/09 – New version – Download

– Uninstall any previous version before installing this one

– New hardware and sensor support for Fan Control

– Small cosmetic fixes and translation improvements

* v. 2.5.0 – 06/Oct/09 – Download

– Uninstall any previous version before installing this one

– General support for new firmware 1.5 and new controller Armadillo

– Many new options in temperature compensation

– Robofocus / Moonlite motor support with no special cables (fw 1.5)

– New temperature sensor support (LM61)

– Simpler and better focuser calibration method

– Ability to “Goto” to any temperature profile point

– Steps per In / Out (focusing) user specifiable

– General internal improvement

– User’s manual – oct/09 – updated to version 2.5.0 – Download

– System chart – jan/09 – updated to version 2.5.0 – Download

v. 1.9.0 – 18/march/09 – Minor improvements – Download

-Several small bugs fixed and general reconnection improvements.

v. 1.8.0 – 10/dic/08 – Fan control just released – Download

– Now you can power your scope’s cooling fan(s) depending on the mirror and ambient temperature

v. 1.6.0 – 20/nov/08 – advanced parameters added – Download

– Support for bipolar motors

– Control the speed, power, etc of attached motors

* v. 1.5.0 – 10/nov/08 – two focusers two filter wheels – Download

– Different devices at the same time

– GOTO and Invert Motion added for focusers

– Multilanguaje

– General debug and cleanup – also a bit more nice.

v. 1.4.9 (previously 2.0.0) – 29/Aug/08 – two focus motors at same time. BETA – Download ZIP file

* v. 1.3.2 – 09/sept/08 – fix release for a bug with temperature profiles. Download EXE

– Thanks to Miguel Muro for discovering the problem

v. 1.3.1 – 01/jul/08 – temperature corrections Only EXE download

-It will only apply temperature corrections after 1 hour has passed since last correction, and only when the variation has been greater than 1ºC. Requested by Javier Gomez Laina

v. 1.3.0a – 13/jun/08 – beta-2 – First english version Full installer download

– Includes all current improvements

– Each profile keeps its current position, so a Seletek can be shared among several scopes keeping the position saved for each one (as requested by Pere Gil)

– Motion control buttons answer improved; and it will be even better in next version

– Async reconnection (if the Seletek controller is disconnected just plugging it again will restore everything)

– Firmware update supported