Is it possible to downgrade just the AMS firmware? I’m running 00.00.06.49 on both of my AMS units (zero release notes about this build anywhere, thanks Bambu), and am seeing an issue where Auto Refill is just choosing whatever colors it wants so long as the filament type matches. Never happened in the past, so I wanted to downgrade my AMS units to 06.44 to see if that resolves it. Problem is, Handy only appears to show me the ability to downgrade both my P1S firmware (currently 1.07) and my AMS firmware at the same time, not one or the other. I cannot risk doing this and then being forced to move to the latest build that kills OrcaSlicer.
You can downgrade via the Handy App. (Settings/Firmware version) Does it show you an option for a lower AMS version?
Yes, but like I said, it pairs it with the P1S firmware, so I cannot downgrade just the AMS firmware, which is what I’m looking to do.
Hello. I am also not liking the most recent couple of firmware updates to the AMS.
Were you able to rollback the firmware? If yes, would you mind to share how and to what version you rolled back to?
Thanks!
You can downgrade your firmware by following these instructions: Bambu Lab: How to downgrade firmware | SimplyPrint Helpdesk
I went back to the following versions:
P1S: 01.06.01.00
AMS Hub: 00.00.00.43
AMS 1: 00.00.06.44
AMS 2: 00.00.06.44
I think nobody read OP question: OP wants to ONLY downgrade the AMS firmware not the printer or any other accesories.
I’m not sure it will work as the printer may expect the current AMS firmware and downgrading only the AMS might either be blocked or give unexpected results.
This said, you can try something, downgrade the firmware using bambu handy that contains the AMS firmware you’re looking for. Download then current firmware from the offline download site: Firmware Download | Bambu Lab and in the zip file delete the ams firmware files (they start with “ams”). Install this zip file on the root of your SD and try to update firmware from there. You may also need to remove the ams lines using a text editor from the ota_package_list json file.
If it works (not sure it works), you may end up at best with the current firmware for the printer but older firmware for the AMS, silghtly worse: it dos not work, the worst, it works but the behavior of the printer or AMS is all over the place.
You’re on your own…
why not go ahead and downgrade both. Then unplug AMS and upgrade the P1S by itself. Then do your testing. It’s essentially the same as just an AMS downgrade, just the long way around
This is precisely what I ended up doing in the long run for my testing. Still had the Auto Refill bug, so in the end I just downgraded to one of the builds in Handy that I knew did not have the issue. I’ll be rolling with this forever now.
Due to comppatibility issue, Handy App has option to downgrade to previous version for whole setup, for example, H2D + AMS 2 Pro + AMS HT. It is just to make sure that everything stay compatible.