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Headless Mode -- connection of wifi, setup of autoconnect to your home wifi

Our system is going to have two wireless adapters; one for receiving video and our onboard wifi. Step 1 is to segregate and name our wireless cards via udev rules.


This changes all wifi cards connect to be wlan0

sudo nano /etc/udev/rules.d/98-custom-wifi.rules

SUBSYSTEM=="net", KERNEL=="wlan*", ACTION=="add", NAME="wlan0"

This changes the radxa zero 3w internal wifi to wlan1 *note -- we're relying on the OUI of the MAC address on the internal wifi adapter, which should be the same for all zero 3w boards.

sudo nano /etc/udev/rules.d/99-custom-wifi.rules

SUBSYSTEM=="net", ACTION=="add", ATTR{address}=="98:03:cf:*:*:*", NAME="wlan1"

Reboot the system for our changes to take effect.

Setup of autoconnect on boot

We're going to rely on NetworkManager.
Enter the following, replacing your_SSID and your_password as needed.

nmcli connection add ifname wlan1 type wifi ssid Your_SSID <---- enter your network name here

nmcli connection edit wifi-wlan1

nmcli> goto wifi
nmcli 802-11-wireless> set mode infrastructure
nmcli 802-11-wireless> back
nmcli> goto wifi-sec
nmcli 802-11-wireless-security> set key-mgmt wpa-psk
nmcli 802-11-wireless-security> set psk Your_Password  <---- enter your password here
nmcli 802-11-wireless-security> save
nmcli 802-11-wireless-security> quit

If your image does not come with NetworkManager

If your image does not ship with NetworkManager, you will need to make an initial manual connection via wpa_supplicant to download and install NetworkManager and then follow the steps above for autoconnection on boot. Wpa_supplicant will not persist after a reboot.

If this is your first boot, you will need to set the root password.

sudo passwd root

then as su:

wpa_passphrase your_SSID your_password > /etc/wpa_supplicant.conf

wpa_supplicant -B -i wlan1 -c /etc/wpa_supplicant.conf

dhclient wlan1

your_SSID is the name of your wifi network
your_password is the network's wifi password

exit su with exit

We should now have connection to the internet. Try pinging a website: ping www.google.com

If that works, run:

sudo apt install --no-install-recommends network-manager

Reboot and then follow the steps above for NetworkManager.

Your Radxa pi zero 3w is now headless, ready for an ssh connection on your home wifi network on bootup.