@louis1987

I don't have any lag with a Pro 2 without a dongle. (Edit: I also use two simultaneously)

First things first: Update your firmware. Use the 8BitDo application from their website.

Next: make sure background is selected under Bluetooth options to keep it initialized.

Which selection (SADX) do you have underneath your controller? Is it configured properly?

Here is a cfg with D input that should work well.

And here is the cfg I use with X-input.

Make sure it is showing the pop-up that the configuration has been added when you start a game. Sometimes I've noticed lag when the controller was working, but was autoconfigured in some way by RetroArch rather than using the cfg file.

If you are still noticing serious lag it may also be due to your case. Drill some holes in it. (not joking. had one of those shmansy metal cases and couldn't get Bluetooth working right with the controller basically on top of it. Then bought an NESPi case that had an SSD slot and the unshielded SATA connector really screwed with the Bluetooth / wifi- an RPI4 a dinky 3d printed plastic case with a good heatsink / fan is your friend)

Get all the basic thresholds and everything working right in the cfg to your liking as close to perfect as you can before you start adding layers of hardware and configuration complexity. Adding complexity to your system configuration outside of retroarch etc. will also likely be lost / not salvaged if you attempt a reinstall.

More hardware, more changes = more headaches down the line.

Keep it simple, focus on basics.

Good luck.

Thank you @Rascas for pointg out where to ask.

For the record: the model of the joystick is Terios T3, but I have found that it is also branded as Gen Game S3.
I haven't found official docs of it, but digging in the forums I found how to set it in gamepad mode, working perfectly without the need of the extra adapter sold to work with a PC (basically turn it on holding HOME and A buttons).

Thank you @seanbeedelicious ! Works like a charm.

Hi,
I'm having this exact same issue with ps3 controller. I went over to other thread to try and figure out own my on, but I'm very new to this and it is very hard to understand how to add the input.cfg.
I don't know where to even access that from. can you please help me and give some step by step guide?
You said you copy and paste a file? Can you please show me how to do that?

@melbmatt50 I've had luck with this method as recently as this week: https://github.com/RetroPie/RetroPie-Setup/wiki/Bluetooth-Controller

@mitu

thank you, I appreciate the information. sorry, i skimmed the read first, must've not been paying attention.

@BuZz yes I Have installed PS3 drivers in the past. How do I ensure they are completely removed?

I'll try cleaning it up and see if that fixes it.

That's fine. This is a single use device. If I can get the PS3 controller working that's all that matters. I was just pointing out my phone to say the dongle is installed and working.

I never thought to remove the retropie driver and pair first with the regular bluetooth stack and then re-enable. I will try that.