For anyone who also wants to use a 3 button Sega controller, there is an option in the Retroarch menu under Settings—>Input—>Menu Toggle Gamepad Combo. You can set it to Hold Start for 2 seconds to bring up the Retroarch menu.
I’m still waiting on my controllers to be delivered, but I would imagine that I’ll also need to edit the Recalbox controller config file to remove the Hotkey from my 3 button Sega controller.
Edit: I just tested this on another controller and it works perfectly! I set the “Hold Start for 2 Seconds” to return to menu option. I then edited the Emulation Station input config file and set the “Hotkey” button to a number higher than my controller had. I found that if I removed the Hotkey completely, Recalbox would then ask me to reconfigure the controller.
@olivierdroid92 Thanks. I already remap on retroarch menu. But A, R button of 2P is not working.
My favorite board is x64. I want to play tekken tag with my friend. tekken tag is possible playing in mame2010.
A, R button of 2P is not not working also on RP3, RP3+, X64 all board with all game pad, gpio too.
@leosabino Upgrade to the latest stable version (currently Recalbox 6.0 Dragonblaze): https://archive.recalbox.com/
You will have to back up your files and start from a clean install because the updater will not be able to upgrade from such an old version (there were many changes).
After that, test and return here to say if it solved.
If you want just look if the system is up or down, you can easly and just connect it (with resistor =>1KOhm) to the power pin of one USB plug. Because PI switch off power on USB if the system is down. Even when power subsist on the board.