= Raspberry Pi WIFI Conf =

Edit the {{{/etc/wpa_supplicant/wpa_supplicant.conf}}}

{{{
$ sudo nano wpa_supplicant/wpa_supplicant.conf
}}}

Add lines to what already is there, like so:

{{{
network={
        ssid="MyHome-A"
        psk="MyHome-A Password"
        id_str="HomeA"
        priority=1
}

network={
        ssid="MyHome-B"
        psk="MyHome-B Password"
        id_str="HomeB"
        priority=2
}
}}}

Make sure the wlan0 interface is up:

{{{
$ sudo ifdown wlan0 # May give an error if not up already.
$ sudo ifup wlan0
}}}