The HORI Flex Controller is similar to the XBox Adaptive Controller in many ways. It allows the use of 3.5mm assistive switches to create a custom controller setup.
To use it with the USB-A port on the Quadstick, set the mode switch in the upper right corner of the HORI Flex Controller to "Nintendo Switch" and update the firmware on the Quadstick to 2357 or later.
HORI Flex Controller is an example configuration spreadsheet showing the mapping between the buttons and joysticks and the "usb_..." inputs in the Quadstick.
The HORI Flex Controller cannot be used for PS4 authentication.
