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8.0. Major Changes for AstroEQ8
Many changes have been made to the AstroEQ firmware
Added support for DRV8834 Low Voltage Driver boards
Rewrite of ST4 code for better performance
Added standalone mode for using the ST4 port without EQMOD
Optimisations to motor routines to better support higher resolution mounts
General tidy up of source code for better readability
Major rewrite of motor routines - now in C rather than assembly
New Acceleration/Deceleration Routines
- provides a much smoother, linear ramp
Option to disable “Gear Change” when performing high speed movements
Improvements have been made to the configuration utility
Reduced the window size of the Config Utility to now work with a minimum screen size of 800×600
Add ability to tab between fields on the config screen
Add ability to paste from clipboard into config fields, and copy contents of fields to clipboard
Fixed bug preventing Config Utility loading on some PCs
8.0.3 (Beta) Major Changes to Config Utility and Firmware
This version has been released as a Beta on the AstroEQ forum.
For details see
7.5.x (Beta) Major Changes to Config Utility and Firmware
This version was released as a Beta on the AstroEQ forum.
This has since been renamed to V8.0.0(beta) due to the magnitude of the firmware changes, and non-backwards compatibility with the V7.x firmware.
7.4. Configuration Utility Updates
Minor update to the firmware to allow new changes in configuration utility.
The configuration utility now allows more configurations that previously resulted in an IVal too small error
Be aware that a small IVal while increasing resolution means that fewer accurate speeds can be achieved
The IVal is tuned to get the most accurate sidereal speed possible, but higher speeds will suffer
Added a 'Test Configuration' option. This allows configurations to be tested without hardware
Basically it jumps to the config screen to allow entry of values without the need for hardware
7.3. Major Changes For AstroEQ7
AstroEQ now allows for 6 different step modes to be selected.
EEPROM configuration has been merged into the main firmware, meaning the firmware doesn't have to be re-uploaded twice each time the configuration is to be changed.
Minor bug that axis stop if requested speed is too high has been fixed.
Configuration Utility has been revamped to make configuration easier - including the ability to save and recall previous configurations.
Configuration Utility on Linux no longer requires to be run from a Terminal. It can no be run as any standard application.
Legacy Hardware designs have been brought up to date and are no longer considered legacy. If you are using an Arduino Mega, please refer to the updated file here:
7.2. Testing Version Not Publically Released
7.1. Testing Version Not Publically Released
7.0. Pre-Release of AstroEQ7
AstroEQ now uses 1/4 and 1/32 step mode for improved accuracy.
Change only affects DRV8825 Driver Boards.
If you have legacy hardware, please see
6.8. Optimisation of Comms
More optimised code for Serial Communications.
Reduces command response time for more reliable Guiding.
6.7. Acceleration delay reduced at low speed
For speed < 2X Sidereal, the mount will start directly at that speed
Reduced starting time of mount
Support for PHD Guiding through EQMOD completed.
6.6. Testing Version Not Publically Released (PHD Support Added)
6.5. Completely Rewritten Ac/Deceleration Routines
New & improved acceleration and deceleration routines
Correct Behaviour when reversing direction - slow to a stop, then accelerate.
Much more linear profile.
6.4. Testing Version Not Publically Released
6.3. Deceleration Routines Bugfix
Fixes a glitch which causes the mount to not decelerate under EQMOD Rate Limiting
6.2. Added ability to change Goto Speed
The Goto Speed used for each axis can be set using the Configuration Utility
Set as a user defined multiple of the sidereal rate.
6.1. Added ST4 Support
Software now supports ST4
Refer to the ST4-Mod-Pics.zip file in the Downloads folder for how to add a guide port.
6.0. Major Software Rewrite
Completely rewritten motor control routines
Changed the way values are calculated for increased accuracy
Added configuration utility to make calculations easier - no more need for Excel.
5.2. Software Patch + Alternative hardware possibility
Added the ability for the speed at which goto's move the mount has been added
Added support for using the Pololu A4983 Breakout Board, rather than the DRV8824 for ease of DIY.
5.1. Software Patch
Added support for mounts which have a different gear ratio on each axis.
5.0. Redesign of Hardware and software
Improved tracking rate calculation to account for rounding errors
Using hardware to send steps to drivers, which reduces unwanted delays (improves accuracy of step rate)
Added a High Torque mode, which allows for increased torque at high speeds by silently switching to half stepping.
pre5.0. No Revisision history from older versions.