wifi rpi

configure key

Using the WNA3100M netgear adapter

nano /etc/wpa_supplicant/wpa_supplicant.conf

replace

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1

with

network={
    ssid="your_ssid"
    scan_ssid=1
    psk="your_password"
    proto=RSN
    key_mgmt=WPA-PSK
    pairwise=CCMP
    auth_alg=OPEN
}

reboot the rpi

knowing that :

ssid: your wifi name
scan_ssid: value of 1 means broadcast and value of 2 means hidden (suggest you enter value of 1)
psk: your wifi password
proto: your choice of RSN or WPA. RSN is WP2 and WPA is WPA1. (most config is RSN)
key_mgmt: your choice of WPA-PSK or WPA-EAP (pre-shared or enterprise respectively)
pairwise: your choice of CCMP or TKIP ( WPA2 or WPA1 respectively)
auth_alg: OPEN option is required for WPA and WPA2 (other option, SHARED & LEAP)

Open the config.txt file with nano:

sudo nano /boot/config.txt

Find the following line:

# Additional overlays and parameters are documented /boot/overlays/README

And add these two lines under it:

dtoverlay=disable-wifi
dtoverlay=disable-bt