"Hold a button on your device"

[sunfighterfranchise]

I am trying to set up my 8bitdo NES30 controllers on Recalbox 4.0 via Bluetooth. They pair just fine using the instructions on the Wiki, but when I try to actually configure inputs, it says "Hold a button on your device," and none of the buttons on the controllers produce any result. Can someone please help? Thanks.

[sunfighterfranchise]

Update: I installed 3.3 instead and the controllers now both pair and allow me to configure them properly, it seems. Appears to be a 4.0 issue?

[styletwo-wan]

4.0 does have bluetooth issue, especially with 8Bitdo controllers.

[i_am_millski]

I think I read somewhere that there was a bug on 4.0 when using two identical 8bitdo controllers - that they would share the same bluetooth name and overwrite each other(?) No idea where I read that though, and if I'm making it up I apologise! For my part my NES30 pro connects just fine and I didn't have to perform any configuration on 4.0, it just works.

[sunfighterfranchise]

Update: I installed 3.3 instead and was able to complete configuration of the controllers. It definitely seems like this is a 4.0 issue.