WiFi USB

In this section, we connect an external WiFi receiver to enable a wireless connection.

For this step we need internet connection. Make sure that the raspberry is connected with an ethernet cable.

Check with ifconfig available connectons

$ ifconfig -a
...
wlan0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500 
       ether b0:a7:b9:ce:d3:58 txqueuelen 1000 (Ethernet)
       RX packets 0 bytes 0 (0.0 B)
       RX errors 0 dropped 0 overruns 0 frame 0
       TX packets 0 bytes 0 (0.0 B)
       TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

We observe that there is no IP associated to wlan0 interface. Let' change that. Run the following command and copy it to the clipboard.

$ wpa_passphrase [SSID] [SSID_PASSWORD]

where SSID and SSID_PASSWORD are the network name and password, respectively. Then open the file wpa_supplicant.conf

$ sudo nano /etc/wpa_supplicant/wpa_supplicant.conf

and paste the content at the end. Also, add four additonal fields. At the end you should have somethng like below:

/etc/wpa_supplicant/wpa_supplicant.conf

network={
        ssid=[SSID]
        psk=[SSID_PASSWORD_PSK]
        proto=RSN
        key_mgmt=WPA-PSK
        pairwise=CCMP
        group=CCMP
}

Finally, reboot the raspberry and it should connect to the network by default.

$ sudo reboot

How to Set Up a USB Wi-Fi Adapter With the Raspberry Pi, lifewire.com, August 25th 2021

Additionally

You can set a static IP this wirelessconnectin, just as you dit with the wire d connection in section Set static IP.