This code was written to connect a LEGO EV3 Brick to a PS4 controller. The EV3 is running [ev3dev](https://www.ev3dev.org/) and running a version of Python called [Pybricks](https://github.com/pybricks/pybricks-micropython). However, the code reacting to the PS4 controller events and the mapping of different buttons should apply to any Python/PS4 project.

This code assumes that the PS4 controller has already been paired.

When the PS4 is paried with the device it creates three event files. These files are updated when the PS4 controller experiecnes an event (such as a button press).

Using a terminal check out the contents of the /dev/input folder before and after you pair the Bluetooth device. You should notice three new event files. On my device these files where:

* /dev/input/event2 (touchpad events)

* /dev/input/event3 (controller movement, like tilting, etc...)

* /dev/input/event4 (buttons, sticks, etc...)

Each event provides five values, but we only need the event ID, code, and value. Here is a list of all events I could find:

** Touchpad Events

For me touchpad events were found in /dev/input/event2.

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