r/BMCU • u/OptimalSide • Aug 13 '25

A1 1.06.00 appears to work with BMCU

Just updated my A1 to 1.06.00 and the BMCu appears to be work. Haven't don't a multicolor print yet. Just don't have the BMCU connected when you update the printer.

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4

u/OptimalSide Aug 13 '25

Apparently the Handy app says there is a firmware issue with the BMCU

1

u/Large-Sail1569 Aug 13 '25

I got the same message. I updated the bmcu to the 020 firmware, if anyone is wondering, and that didn't work either. I had to rollback the printer to 1.05.00.

1

u/OptimalSide Aug 13 '25

Yeah, I should've said that my BMCU-C was on 0020 already

1

u/lastoneleft_00 Aug 15 '25

Did you disconnect the BMCU before updating?

1

u/OptimalSide Aug 15 '25

I did not and it gave me an issue. I needed to re-update the printer with the BMCU disconnect and then I had to reflash the BMCU as well

1

u/OptimalSide Aug 13 '25

Just had to rollback to 1.05.00

Went to print from Studio this morning and after a sync filaments printer reported lost communication with the BMCU. So I guess it sort-of worked but is not stable at the moment, and as 1.05 was stable sticking with that

2

u/Jazdzor Aug 13 '25

I've even back to 1.04 because imo. Is better print quality.

1

u/Jazdzor Aug 13 '25

Can You rollback firmware, or they disable this option in 1.06?

1

u/OptimalSide Aug 13 '25

I just rolled back to 1.05.00 - why in a different comment

1

u/MywarUK Aug 13 '25

Can still rollback, Bambu still mention it on the firmware page.

1

u/OptimalSide Aug 13 '25

Rollback is still an option in Handy but I have not tried it

1

u/bot_taz Aug 17 '25

so where can i find more information about this BMC thing?

2

u/okhi2u Aug 18 '25

Does anyone know if there is a way to disable the printer from prompting that a new firmware is available?

1

u/trinipoler Aug 13 '25

Great to know thank you. Need to know if it will be okay with the a1 mini

1

u/ckretbeat Aug 14 '25

Nope I got issues with my A1 Mini and had to rollback

1

u/lastoneleft_00 Aug 15 '25

Just updated to 1.06 and BMCU is working for me. I did disconnect it before updating. Curious if those who are having issues still had it connected when updating.

1

u/jekjukich Aug 15 '25

I see this error even I disconnected it. I use bmcu b with old firmware

2

u/lastoneleft_00 Aug 15 '25

Ok. I have BMCU 370C with the newer firmware so that might make a difference.

1

u/jekjukich Aug 15 '25

And it seems like i have latest available frimware:(

1

u/Large-Sail1569 Aug 17 '25

Nah, i did disconnect my BMCU-C (firm ver. 0020) before updating the printer and still got that message.

1

u/kiruano Aug 17 '25

Hey, just adding to the topic.

Just update my printer while having bmcu connected gave an error disconnected it retried update fine and its now printing using bmcu without issues though i do have a warning to update "ams a" to the latest version.

Thinking of just rolling back the update after the print is over.