how to edit /etc/wpa_supplicant/wpa_supplicant.conf code example
Example 1: raspberry pi wpa_supplicant
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=US
network={
ssid="Your network name/SSID"
psk="Your WPA/WPA2 security key"
key_mgmt=WPA-PSK
}
Example 2: raspberry pi scan networks
sudo iwlist wlan0 scan