Once you've [written the image file onto the SD card](https://github.com/evilsocket/pwnagotchi/blob/master/docs/install.md#flashing-an-image), there're a few steps you'll have to follow in order to configure your new Pwnagotchi properly.
The default password is `raspberry`; you should change it as soon as you log in for the first time by issuing the `passwd` command and selecting a new and more complex passphrase.
Open the `/etc/pwnagotchi/config.yml` file (either via SSH or by directly editing the SD card contents from a computer) that will override the [default configuration](https://github.com/evilsocket/pwnagotchi/blob/master/pwnagotchi/defaults.yml) with your custom values.
Pwnagotchi displays its UI in English by default, but it can speak several other languages! If you're fine with English, you don't need to do anything special.
But if you want, you can change `main.lang` to one of the supported languages:
By default the `grid` [plugin](https://github.com/evilsocket/pwnagotchi/blob/master/docs/plugins.md) is enabled, this means that whenever the unit will detect internet connectivity in manual mode, it'll signal its
presence to the PwnGRID server and periodically send a list of the networks that it has pwned. None of the captured cryptographic material is sent to this server,
just the minimum information to enroll the unit in the database and know how many networks it "conquered" so far, namely:
- The cryptographic identity of the unit, generated at first boot and used for authentication.
- The output of the `uname -a` command on the unit used to determine the type of hardware.
- The list of networks that the unit collected handshakes of, made of their `BSSID` and `ESSID`.
Other than for easy unit identification and debugging, this data is collected in order to build rankings, scoreboards and regional statistics. **Like Pokèmon Go, but for WiFi!**
If you want to partially opt-out from this feature and have your unit only signal its presence without sending the list of networks, you can put this in your `/etc/pwnagotchi/config.yml` file:
**You can configure the refresh interval of the display via `ui.fps`.** We recommend using a slow refresh rate to avoid shortening the lifetime of your e-ink display. The default value is `0`, which will *only* refresh when changes are made to the screen.