How do i set up wpa_supplicant

Hello please help how do i enable the wifi ssid and psk via sd because i dont have hdmi and i’m in an event of robotics i need to solve it really fast i have the whole system mounted but when i tried to change wifi it crashed

here is a tutorial:
(It’s right above the block “3. Prepare the first boot”)

I guess OP is looking for a way to configure WIFi in headless mode after first boot finished?? :thinking:

Do you have SSH access??