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Firmware Update History

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This page provides an overview of the changes to our firmware. This applies to the application code in our hand controllers, mounts, and accessories. It does not fully describe updates to boot loaders or databases. Release dates are approximate.

This document covers only those devices whose firmware can be updated using Celestron Firmware Manager (CFM). The latest releases for CFM and this document can be found at URL below. Download Celestron Firmware Manager (CFM)

Celestron recommends that you always use the latest version of the firmware in your devices

Notify Me of Updates

Product Version Release Date Updates
Advanced VX (AVX) 7.15.8270 November-2018 Retuned feedback loop. Improves tracking slightly and slewing at rates 2 - 6.
Reduced drop error at the end of a goto operation.
7.13.7075 April-2017 Bug Fix: Tracking now turns back on when you back away from a RA slew limit.
Feature: When mount hits a slew limit it decelerates smoothly to a stop
Feature: When mount hits a slew limit it posts a warning to a NexStar+ HC. Requires 5.29.6225+ of the NexStar+ HC
7.11.5056 March-2015 Bug Fix: AVX compatibility with newer HC firmware and possibly GPS.
Support for Hardware changes in AVX update (8pin header, K10 MCU etc.)
7.09.4155 July-2014 Bug Fix: Toggling up and down quickly causes anti-backlash to moved too far.
7.08.3065 March-2013 Bug Fix: Version number not reported correctly.
Bug Fix: With slew limits are disabled, you can’t slew east.
7.07.2356 January-2013 Initial release.
AMW007 WiFi module (3rd generation) 1.2.0.10 February-2018 Initial Release
Astro Fi 7.15.9120 July-2019 Bug Fix: WiFi would lock up if user lost connection to WiFi attempted to reconnect
Bug Fix: Improved reliability of CFM updates over WiFi
7.15.8160 February-2018 Bug Fixes: Performance updates.
Feedback loop retuned to make slewing at rate 2-6 smoother.
Reduced drop error on goto operations.
7.13.6110 March-2017 Bug Fix: Tracking command sent during slew caused mount slew forever.
Bug Fix: A rare “No Response” error associated with the WiFi module.
Bundled with boot loader update which makes WiFi updates more reliable.
7.13.6055 May-2016 Initial Release
Celestron Focuser Utility 1.0.0 January-2019 Initial release
CGX 7.15.9120 July-2019 Bug Fix: USB to auxbus passthrough glitch
7.15.8270 November-2018 Fixed bug introduced in 7.15.8160
7.15.8160 August-2018 Retuned feedback loop to reduce “buzzing” heard on some mounts.
Reduced the drop error when doing a goto operation.
Known bug: this version caused unexpected slews during alignment.
7.13.7070 March-2017 Support for PecTool
Reduce false alarms on RA and Dec sensors
7.13.7018 March-2017 Reduces power consumption during high speed slews.
7.13.6223 October-2016 Changed default guide rate to 90% sidereal
7.13.6162 September-2016 Initial Release
CGXL 7.15.9120 July-2019 Bug Fix: USB to auxbus passthrough glitch
7.15.8270 November-2018 Fixed bug introduced in 7.15.8160
7.15.8160 August-2018 Retuned feedback loop to reduce “buzzing” heard on some mounts.
Reduced the drop error when doing a goto operation.
Known bug: This version caused unexpected slews during alignment.
7.13.7070 March-2017 Support for PecTool
Reduce false alarms on RA and Dec sensors
7.13.7018 March-2017 Reduces power consumption during high speed slews.
7.13.6350 February-2017 Initial Release
Celestron PWI 2.2.3 September-2019 Feature: New StarSense user-auto-align generator tool
Feature: Ability to set solar and lunar tracking rates, as well as enable Ra+Dec tracking for GEM mounts
Feature: Joystick/Gamepad support for mount movement control
Feature: Meridian sweep support added
Feature: Slew limits for alt-az mounts
Feature: Battery monitoring for mounts with batteries
Bug Fix: Issues with StarSense communication resolved
Bug Fix: CPU power consumption decreased substantially
Bug Fix: ASCOM related bug fixes
2.1.25 April-2019 Feature: Complete UI revamp
Feature: StarSense support added
Feature: AllStar Polar Alignment added
Feature: Mount configuration options added
Feature: WiFi support added
Feature: Support for all current computerized telescopes added
Feature: Support for HC connection
1.0.3 June-2019 Small UI updates
1.0.0 January-2019 Initial release (CGX and CGXL support only)
Evolution 7.15.9215 August-2019 Bug Fix: Retuned feedback loop
7.15.9120 July-2019 Bug Fix: WiFi would lock up if user lost connection to WiFi attempted to reconnect
Bug Fix: Improved reliability of CFM updates over WiFi
7.15.9088 April-2019 Bug Fix: Internal 3rd generation WiFi module caused SkyPortal to lock up when used with StarSense Accessory camera.
7.15.8262 August-2018 Tweaked Goto’s to make them more accurate
Reduced power consumption when power switch is off.
Bug fix: WiFi light was flashing when switch was off but battery charging.
Fixed buzzing sound when mount stationary
Added support for 3rd generation internal WiFi modules
7.13.7125 February-2018 Bug Fix: Settings were reset to factory defaults if you plugged in the mount when it was switched off
Feature: low battery warning on NS+ HC (requires 5.29.xxxx in the HC).
Bug Fix: Some mount were reporting the battery voltage/charge status incorrectly.
Feature: If left plugged in indefinitely, the charger will keep the battery topped off.
7.11.6165 August-2016 Improved tracking performance.
7.11.5100 May-2015 Reduce battery consumption while slewing.
Stability enhancements when updating over internal WiFi module.
7.10.4188 September-2014 Reduce power consumption while switched off.
7.10.4109 August-2014 Initial Release
Motorized Focuser Accessory 7.15.9120 July-2019 Bug Fix: USB to auxbus passthrough glitch
7.15.8240 April-2019 Initial Release
NexStar+ Hand Control 5.30.9200 August-2019 Patch : account for additional modules, including those that failed after April 6th.
Bug Fix: patch in 9104, could fail on August 17th for some modules.
5.30.9104 May-2019 Patch : account for GPS modules that failed the April 6th Week Number Rollover.
5.30.9015 January-2019 Critical Bug Fix: The “Get RA/Dec” bug and other issues introduced in 5.30.9009.
Known Issue: User Objects was removed from the GEM build for technical reasons, but it will return in the next release.
Critical Bug Fix: The “Get RA/Dec” bug and other issues introduced in 5.30.9009.
Known Issue: User Objects was removed from the GEM build for technical reasons, but it will return in the next release.
5.30.9009 January-2019 Fixed erroneous database pointers detected in 5,30.8333
Bug discovered after release: GEM version didn’t work with Get RA/Dec. Alignment may also be affected. Alt-Az seems unaffected.
5.30.8333 January-2019 Support for Motorized Focuser.
Bug Fix: Due to database corruption, some languages did not show all menus
Bug Fix: dates/times with uninitialized time zones do not read as “local” which caused many people to believe their GPS modules were not working.
Feature: When selecting a time zone, the HC will try to pick a close one based on the longitude
Known Issue: While waiting to acquire GPS, the time shown is erroneous until the GPS is fully linked up and the location is computed.
Bug discovered after release: Some city names printed incorrectly
5.29.7137 July-2017 Bug Fix: If time in the 12 o'clock hour (between 12pm and 12:59 pm) was entered, the date was incorrectly incremented.
Bug Fix: Returns immediately with error after receiving MTR_UNRECOGNIZED_COMMAND without trying 4 times again.
Bug Fix: Switch calibration had a sign error
Bug Fix: CGX(L) offered Tandem Mode erroneously
5.29.6226 February-2017 Bug Fix: CGX-L mount reported as “CGX”. No functional changes.
5.29.6225 September-2016 CGX support.
Bug Fix: LED settings not initialized at power up.
Support for warnings messages, e.g. “slew limit reached”, and “battery low”
Support for error messages, e.g. “CGX hardware switch failure”
Note: Errors and warnings require MC support. Currently CGX only.
5.29.6111 March-2016 Support for Astro Fi
Fixes restores ASCOM.
Corrects problem discovered in 5.28.5183.
5.28.5300 November-2015 Bug Fix: RS-232 “h” command failures
Bug Fix: Language resets
Bug Fix: Incompatibility with GPS modules
Known Bug: Completely breaks ASCOM
5.28.5183 August-2015 Feature: New RS-232 command “y” : last alignment
Half hour and quarter hour time zone support
Updated and expanded the city database
Known bug: lock ups occur when polling with ASCOM while using the MENU tree.
5.27.5150 July-2015 Korean Language support
5.26.5080 March-2015 Bug Fix: User Objects getting smashed when new units added.
Bug Fix: Factory reset does not reset Language setting
Boot Loader 3.1.xxxx improves support of old HC’s with old WiFi modules.
5.25.4320 December-2014 Bug Fix: ASPA doesn’t work in southern hemisphere.
Official Support for WiFi updating.
Bug Fix: RS232 commands Side of Pier and Desired SOP.
EVO: Japanese and Russian support
5.24.4200 September-2014 Bug Fix: Peripherals menu showing in non-Evolution mount.
Improved CFM support for WiFi updates — still failing for some users.
5.24.4182 August-2014 Support for Evolution mount: peripherals menu, controls and monitors for battery, WiFi module, etc.
Beta support for updates via WiFi module.
Bug Fix: Long messages on the aux bus, could crash the HC.
5.23.4110 May-2014 Support for COSMOS (TM) mount.
5.22.3100 June-2013 Support for hardware changes to the PCB and the LCD
5.21.2336 December-2012 Bug Fix: Display not correct contrast
Bug Fix: Moon not showing in Solar System Align (since 5.21.2014)
AVX: supports RTC 2.0 protocol. (fewer glitches near hour/date rollovers).
AVX: improved meridian sweep.
Holding button 0 at power up, leads to Factory reset for HC.
5.21.2200 September-2012 Support for Advanced VX
Support for Orion StarSeeker
Bug Fix: Camera menu showing up in mounts other than SE 4/5.
Bug Fix: Custom Rate9 support not showing in SE 4/5
Support for half width characters in Asian languages
Bug Fix: Scrolling characters overwrite information on LCD.
5.21.2102 April-2012 Support for Costco 2012 mounts
5.21.2064 March-2012 Bug Fix: Alt Az mounts when Dec < 0.
Bug Fix: erroneous “No items in database” error during 2-star alignment
Bug Fix: rare alignment failure on Alt-Az mounts due to math library error.
Bug Fix: Soft Sync when tandem mode set.
Bug Fix: Land objects in the south (north in the SH).
5.21.2014 January-2012 Hand control menu added.
European Language support (French, German, Italian, Spanish, Russian)
Asian Language support (Chinese, Japanese)
Bold, Contrast, LED brightness settings
Bug Fix: Set Mount position when median mode active
Bug Fix: Hard Sync failure when OTA orientation west.
5.21.1236 December-2011 Corrected “Direction Button” polarity bug
CPC_Deluxe support
Bug Fix: NCG objects greater than 5462
Bug Fix: Blinking on View Time/Site page
5.21.1180 September-2011 Initial release
SkyPortal WiFi Accessory (3rd generation) 3.1.9120 July-2019 Bug Fix: WiFi would lock up if user lost connection to WiFi attempted to reconnect
Bug Fix: Improved reliability of CFM updates over WiFi
3.1.8234 August-2018 Initial Release
StarSense Accessory Camera 1.2.13343 January-2014 Support for changes made in 1.09.13346 of the Hand Control firmware.
1.1.13285 November-2013 Support for changes made in 1.06.13287 of the Hand Control firmware
1.1.13201 September-2013 Initial Release
StarSense Accessory Hand Control 1.19.19207 August-2019 Patch: Account for old GPS modules that failed the Week Number Rollover.
Allow camera to boot in the background while you begin your alignment or use the menus to setup other items.
1.19.19003 January-2019 Support for Motorized Focuser.
1.19.18006 January-2018 Recreated All Star Polar Align routines. It now works on Wedge mounts. GEM mounts should see faster convergence to the pole.
Known bug: Sometimes slows to “final approach speed” when the mount is still some distance from the target. Also found in 1.18 and earlier releases.
Bug Fix: reduced frequency of the bug where the HC would freeze up displaying “Acquiring Image” during alignment.
1.18.17055 May-2017 Bug Fix: Custom Rate 9 not working (CGEM and others)
Bug Fix: Cord wrap feature not re-enabled after hibernate
Feature: Clear Alignment data with LOGO + BACK
Bug Fix: RS-232 sync past meridian now syncs with correct position.
Bug Fix: J2000 bug on RS-232 sync command.
Bug Fix: SSI box compatibility restored.
Bug Fix: Partial repair of support with SSI + SkyFi + SkySafari.
1.17.16291 March-2017 Known Bug: Incompatibility with StarSense Interface Box (MotorMenu.c line 170 trap).
Bug Fix: Custom rate 9 entry showing impossible values
Bug Fix: After Hibernate cordwrap was not engaged
Feature: Alignment save Data will warn if used with wrong mount.
Feature: Aligment Clear Data clears entry. LOGO+BACK clears alignment data
Bug Fix: RS-232 Sync past meridian not working
Bug Fix: J2000 bug on RS-232 sync commands
1.16.16055 March-2016 Support for StarSense Interface box and SkyWatcher mounts
Bug Fix: Wake from Hibernate not reenabling cordwrap
1.15.15178 August-2015 Bug Fix: Custom Rate 9 cannot be enabled/disabled
Bug Fix: Still using J2000 in RS-232 sync command
Adds support for updates via WiFi accessory
1.14.15019 February-2015 Feature: you can now back out of ASPA at any time.
Bug Fix: RS-232 now uses JNOW
Bug Fix: Solar System object pointing degrades after UTC midnight
Bug Fix: View/Goto position still showing J2000 instead of JNOW
1.13.14356 January-2015 Feature: JNOW is used for all objects, but J2000 remains an option.
Bug Fix: Southern Hemisphere wedge pointing
Bug Fix: ASPA gives bad values if plate solving fails.
Bug Fix: Turning tracking off, switches to RA + Dec tracking.
1.12.14318 December-2014 Bug Fix: All Star Polar Align feature doesn’t work
Bug Fix: DB object declinations between 0 and -1 show up as with positive dec.
Bug Fix: Solar system objects positions drifted long after alignment.
Bug Fix: GPS screen allows you to leave before it was fully linked.
Bug Fix: Pointing when using a wedge and Full auto not always working
1.11.14176 August-2014 Bug Fix: pointing to Solar System objects broken in 1.11.14164
1.11.14164 August-2014 Improvements to menus
data entry and display is now more intuitive.
Feature: Solar System Align and Quick Align work without camera
Bug Fix: User Auto Align not working with more than 4 alignment references
Bug Fix: SAO DB indexing not always correct
RS-232 sync: does Hard Sync rather than add align reference
Known bug: Breaks pointing on a wedge with Auto Align.
1.11.14142 June-2014 Filter Limit and Slew Limits separation
Bug Fix: Allow Sun not saved to EEPROM
Feature: User Auto Align
IC Catalog added
Bug Fix: EQ mounts not properly initialized at power up.
Bug fixes: User profiles not reliable
Custom Rate 9 option added
1.10.14008 February-2014 Bug Fix: RA only mode
1.09.13346 January-2014 Bug Fix: Year read out incorrectly on GPS and RTC devices
Bug Fixes: Southern hemisphere working (except Solar system align)
1.07.13311 December-2013 Reduced power up delays.
Bug Fix: Hibernate/Wake locking up.
1.06.13287 November-2013 Bug Fix: Calibration not always working
Feature: added Local Sidereal Time
Improved clarity of error messages
Feature: User profiles
1.06.13246 October-2013 Support for mounts with switches
random lock ups
1.06.13201 September-2013 Initial Release
StarSense Interface Box For SkyWatcher Telescopes 1.0.6032 March-2016 Initial Release