8bitdo Arcade Stick - Bluetooth connection RT and LT issue

rastabolino

After a bit more messing around in jstest here is what I see.
mapping appears to be the following

joystick button: what turns on/off in jstest
A: 0
B: 1
X: 2
Y: 3
RB: 5
LB: 4
Start: 7
Select: 6
these are the odd ones-
RT: 5:-32767 when activated the "-" goes on and off
LT: 2:-32767 when activated the "-" goes on and off

mitu

@rastabolino said in 8bitdo Arcade Stick - Bluetooth connection RT and LT issue:

RT: 5:-32767 when activated the "-" goes on and off
LT: 2:-32767 when activated the "-" goes on and off

They look like analog axis and not buttons.

YFZdude

@rastabolino said in 8bitdo Arcade Stick - Bluetooth connection RT and LT issue:

RT: 5:-32767 when activated the "-" goes on and off
LT: 2:-32767 when activated the "-" goes on and off

Are you saying that when you watch the screen pressing nothing the value is -32767 and when you press the button it instantly changes to 32767 and you never see any numbers other than those two?

rastabolino

@yfzdude

Yes that is correct. For those two buttons at least. The other buttons register as buttons and show on or off. But LT and RT react as you asked.

YFZdude

@rastabolino
It sounds like the driver is incorrectly detecting the exact controller type and trying to assign those two buttons to be analog triggers instead of digital buttons.

Does it make a difference if you change the mode by using the switches on the top left of the controller and reconnect?

SuperDodge seems to have found a workaround for this if you are willing to connect the controller with either the USB cable, or the 2.4GHz adapter.
See https://retropie.org.uk/forum/post/243118 for the details.

mitu

@yfzdude said in 8bitdo Arcade Stick - Bluetooth connection RT and LT issue:

SuperDodge seems to have found a workaround for this if you are willing to connect the controller with either the USB cable, or the 2.4GHz adapter.
See https://retropie.org.uk/forum/post/243118 for the details.

Actually, this is where this topic originated, but this one is about using the controller over Bluetooth.

Over USB, xpad takes care of the triggers-as-axis issue, but over Bluetooth I think the pad is not handled by xpad. The same issue was present on the M30 (Megadrive) controller, for compatibility with the Xbox controllers, 8Bitdo decided to map L/R to axis.
RetroArch auto-configuration can be modified to make the buttons work( see the existing auto-config for the M30_XInput), but EmulationStation will not. What you can do is skip the L/RT buttons in EmulationStation, then manually add to the generated .cfg file some entries for the missing buttons:

input_r2_axis = "+5"
input_l2_axis = "+2"

You can find said configuration file in \\retropie\configs\all\retroarch-joypads.

You could try mapping them in Switch Mode over BT and see if the behavior is different.

rastabolino

@mitu @YFZdude

Thank you both for your responses. I will have a chance to test out the controller in switch mode and play around with the configuration files after the Thanksgiving holiday. I will get back to you in a few days. Happy holidays and thanks for the support!

RotoPropJet

I found a super easy solution/workaround.
The issue seems to be that RT & LT are analogue. We can also see this when one plugs in the 8bitdo Arcade Stick via USB to a Windows PC and check the properties of the game controller.

The solution/workaround I used was to use the 8bitdo Ultimate software and map the RT and LT with RS (Right Stick push) and LS (Left Stick Push) instead. Those are not analogue, so there is no more problems. Once in Retropie, just do the normal “Configure Input” from the Main menu (after hitting the “start button”) and voilà! This seems to work for both Bluetooth connection or using the 2.4G stick.
Yes, the controller will send a signal normally associated to LS and RS instead of LT and RT, but it will not matter at all, since it is taken care of during the normal “configure inputs” step we do in Retropie.

RotoPropJet

So in summary, for any newbies:

Go to the 8bitdo official website, download and install the 8bitdo ultimate software on your PC or Mac, if not already done.
Plug the 8Bitdo Arcade Stick to your PC or Mac with a USB cable and make sure your selector knob is in “X” mode (top left of the 8bitdo Arcade Stick)
Start the 8bitdo Ultimate software
On the right, in the button mapping panel, beside RT, associate RS instead. Do the same for LT except choose LS.
Don’t forget to synchronize the controller (icon at the top) before disconnecting the USB cable.
Connect your 8bitdo Arcade stick to the Retropie either via a USB cable, the 2. To 4G stick or Bluetooth.
Push the start button to get to the main menu (you might need another controller or keyboard to make the selections initially).
Select “configure input”. At first, make sure your selector knob is selected to DP (middle selection) to associate D-pad up, down, left, right. This time the RT and RS buttons will work flawlessly.

rastabolino

@rotopropjet

Thank you so much for sharing this solution! This was an easy fix and works for me too.