steamdeck4j

A Java library for getting the Steam Deck's raw input data by using the SteamClient API via the CEF debugger.

Usage

SteamDeck deck = SteamDeck.create(); // you can also pass in a custom CEF url here

// poll the Steam Deck for input data and join the future
// this is a manual process and will not be polled automatically
deck.poll().join(); 

ControllerState state = deck.getControllerState();
float gyroX = state.flGyroDegreesPerSecondX();
boolean r5Button = state.getButtonState(ControllerButton.R5); // back grip button

deck.close(); // unregisters listeners and closes the connection

Things to note

This library requires the CEF debugger to be exposed, which it is not by default. Decky Loader is a common app used on Steam Deck to add plugins, and this enables the CEF debugger to function. It is recommended that users install Decky as it's the easiest way to get the CEF debugger working.