===== Restoring back to Official Factory OEM Firmware =====
If you want to, you can restore your firmware back to the stock factory firmware at any time. Previously, JGAurora only supplied their firmware as HEX files, but they released the source code for their latest version in April 2018. You can download these files for your model below:
  * [[http://sampin.ch/A5-OEM-firmware|A5 stock OEM firmware]]
  * [[http://sampin.ch/A3S-OEM-firmware|A3S stock OEM firmware]]

You can flash this firmware using the Cura or JGCreat software. However, but I suggest using the [[http://russemotto.com/xloader/|XLoader]] software on PC, or [[http://paulkaplan.me/HexUploader/|HexUploader]] software on a Mac.
You may want to watch my video of how to install firmware via hex files [[https://www.youtube.com/watch?v=ZE0siGAvZNI|here]]. 


=== Change Log (from A5 firmware) ===
By examining the JGAurora firmware files, the following major changes were observed:

17th Nov 2017
  * First firmware release

18th Dec 2017
  * Fixed extruder calibration (96 steps/mm)

18th Jan 2018
  * Updated marlin base version to 1.1.6
  * Increased Acceleration (1000mm/s2)
  * Enabled EEPROM