rpi network setup

network.config

[/etc/network/interfaces]
auto lo
iface lo inet loopback

#auto wlan0
allow-hotplug wlan0
iface wlan0 inet manual
    wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf
iface home inet dhcp
iface mobile inet dhcp

#wpa-ssid ssid1
#wpa-psk psk1
#wpa-ssid ssid2
#wpa-psk psk2

[/etc/wpa_supplicant/wpa_supplicant.conf]
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
    ssid="ssid1"
    psk="psk1"
    id_str="home"
}
network={
    ssid="ssid2"
    psk="psk2"
    id_str="mobile"
    scan_ssid=1
}