Unable to enable wifi interface "wlan0" in RaspberryPi 4 B [ARCH Linux]

[aujat]

I have a RaspberryPi 4 B which runs Arch Linux for ARM.

I follow the installation steps provided by https://archlinuxarm.org/platforms/armv ... berry-pi-4, It can boot successfully.

However, when I type `ip addr show`, it print out the following links for wlan0:

```
wlan0: <NO-CARRIER,BROADCAST,MULTICAST,UP> ................. DOWN ........
```

While, the Ethernet interface is UP.

No matter how I enter `ip link set wlan0 up`, the status of wlan0 is still DOWN.

I login to this Raspberry through ssh via Ethernet interface.

How can I turn wlan0 up?

[GizmoTheGreen]

I think easiest way is install netctl and dialog (will give you access to wifi-menu command) for easy wifi setup.
else you will have to use wpa_supplicant, you can find instructions on usage on arch wiki

I got an error trying to pass wpa_passphrase in command so I piped it to a txt file then used that in wpa_supplicant command instead (after -c put the filename)