Two different firmware are available for the A5S and A1. There is the official firmware from the manufacturer, and there is a community-created custom firmware as well. There is a big difference between these firmware. If you don't like the community firmware, you can easily switch back to the official firmware — there are no permanent changes made to your printer.
The A5S and A1 printers use the same motherboard, but they have a slight difference in their configuration, so make sure you install the correct firmware for your printer.
Official Guide: how to flash the firmware, by JGAURORA
Installing the firmware is easy, and it is the same for both the official and the community firmwares.
Please Note: The firmware file is automatically removed from the card after updating.
It is strongly recommended to upgrade to the latest firmware, if you have not already. There are features that improve the safety of the machine in operation.
Please note, the new OEM firmware now connects at 250000 baud, where as the original OEM firmware connected at 115200 baud.
You can download the official firmware from JGAurora's website here: Download Official JGAurora Firmware
A new firmware has been created for these printers, based of the development Marlin 2.0 branch. While these firmware have been under testing for several months to work out most of the bugs, this firmware is provided with no warranty, and you use it at your own risk.
You can download the latest firmware for your printer here: Download JGAurora A5S & A1 Community Marlin Firmware
If you do try this firmware, please take the time to give us feedback on the forum here. We would like to hear if it works well, or if you run into difficulties.
To learn how to compile the firmware yourself, please see this page.