2 hours trying to get wifi working on a raspberry pi 4b.
I give up. I'll run an ethernet cable. It will live on the same desk as my switch anyway.
Discussion
Maybe hardware defect?
Do you have an appropriate power supply? The Pis act weird when the voltage is too low or drops after connecting periphery.
Turns out I don't give up and I figured it out. Mainsail #3dprinting image for pi4b is busted somehow.
I installed raspi OS 64 Lite and wifi works fine. Using KIAUH script to install the tools from the custom image now.
Not familiar with Mainsail, but default linux kernel should recognize the wifi interface, if not you might need to implement some kernel modules
Interface was recognized amd could see my network when I scanned. It just would not connect.
Maybe a MAC filter in your AP?
Nope, the exact same rpi connected just by picking a different OS out of the raspi-imager list.
hm could be your AP only supports WPA3 and your OS uses a lower one...
I've run into issues with wpa3 and wpa2/wpa3 mixed before. Raspberry pis, even 5s, don't do wpa3 at all yet as far as I know. I run a wpa2 ssid for old devices and a wpa3 ssid for newer devices that can support it. I was using the wpa2 network.