You can now add Bluetooth Low Energy (BLE) functionality to your Steam Controller. This feature is required to enjoy the Steam Link app, but may provide benefit in other use cases as well. This FAQ describes what this BLE connection can and cannot do compared to the original wireless solution, steps to update your controller to add BLE support, and how to switch between wireless modes once the update is installed.
You'll want to use BLE mode when:
Otherwise we suggesting sticking with the original protocol. It provides the fastest connection, with low-latency support for up to four controllers per receiver, and works across all major operating systems. The BLE connection is excellent, but the native wireless protocol was designed from the ground up to provide the best experience for a Steam Controller.
Be aware that the original wireless mode will still be available after adding Bluetooth support. However, the update process will clear all pairings, so you will need to reconnect your wireless receiver to your controller. The steps below guide you through the update and pairing process.
Congrats! You have reconnected your controller to the Wireless Receiver. Next, connect over BLE by navigating to the Add Bluetooth option of your device. When prompted, press Y + Steam Button on your Steam Controller to make it discoverable.
If you have already followed the instructions above, you are paired via the Steam Controller Wireless Receiver and BLE. Use the commands below to start your controller in the mode of your choice.
You’ll need to do this in order to use the Steam Link app
Launches controller in BLE mode
Pair your controller to a new receiver
Use your controller in Original Receiver Mode
If something isn't working quite right, you can revert back to the previous firmware. Navigate to the same spot in the Controller Settings page where you found the Bluetooth FW button. Now you will see a Rollback FW button in its place. Click that, wait a few minutes, and you should be running the previous version.