I have one and it's working fine with the latest RetroPie version.
What's the issue exactly ?

@bradbradbrad hmmm, I will have to procure that UB400 and experiment! Thanks for the tip!

@mfraz74 Looks like Debian doesn't package the 8bitdo-tool or it's included in a plugin, but I haven't used fwupd so far, so I can't offer more details. Try using the macOS updater to install the latest (4.20 I think) version of the firmware.

Can you provide some more details here for the SN30 and how you paired it. I think I am getting lost. I currently have it in switch mode, and all buttons except a few are working right now. I will try pairing it another way to see where I get.

Im using retropie on a raspberry pi

@D39 Have fun with RetroPie !

I have modified the values in RetroPie and in Raspbian. Thank you. It's fixed. I just hope this doesn't have a significant impact on other activities on the Pi sucj as simple web browsing.