If you want to update your firmware and you are not introduced with the whole process this tutorial will guide you how to finish it successfully. Follow this steps and you will do this easily.
Step 1. Open the SteamVR application from your PC
Step 2. Check if the firmware is out of date
■ If your firmware is out of date > click > Update base station firmware.
■ With micro USB cable make a connection between the base stations and your computer.
Connect the base stations to your PC’s USB ports.
■ While you power the base stations press the Channel button ( it is placed at the back of the base stations)
■ When the update is over > click done.