The firmware is the operating system that is running on PocketScan's electronics. If there is a new firmware update available, once PocketScan is connected to the app, it will start the update automatically. You will see a progress bar, which will take around 3 minutes to finish. During that time PocketScan should not be switched off. After the update, PocketScan will automatically power-off and you have to power it on again. Afterwards, the connection will be re-established and scanning is possible.