Important notice for 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.

Current version: 

Software 4.79

Firmware 5.1.0

Last update: March 25, 2019

Online Documentation:

Seletek's help   

Quick links to current packages:

Software V4.7Valid for all controllers and Windows versions

NEW!!  INDI driver 


Drivers, needed only for new installations with USB connection:

 Armadillo & Platypus USB 

Windows XP, Vista and Windows 7

 Armadillo & Platypus USB 

Windows 8 & 10, 32 & 64 bits

 Original Seletek controller 

Any Windows version

Quick links to current firmware

FW Platypus

FW Armadillo

FW Seletek

Seletek's version history

Firmware 5.1.0

  • Fixed the temperature readings while the motor is moving.

Platypus Only!

Software 4.7.9 / Firmware 5.0.1:

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 )
  • Some other internal improvements
  • Only "Main" program changed, to install software, please use this link: 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