N-sl Wireless Controller Firmware Update Review

Look at the software interface. The "Update Firmware" or "Download" button, which was previously greyed out, should now be clickable. If the software says "Device Disconnected," unplug the cable and repeat Step 2 using a different button combination. Step 4: Execute the Update

Updating your controller is built right into the Switch's internal menus. You can update both official Nintendo Pro Controllers and most officially licensed third-party N-SL controllers using this method. Step 1: Prep Your Equipment n-sl wireless controller firmware update