Fast switching of WIFI networks

[Powershell]

Hi guys and happy new year!

I travel alot and I always take my Pi 3 with me as a headless server.

To use public hotspots, I need a solution to quickly add SSID and PSK of any new network.

Would it be correct if I somehow do the following:

I put a copy of "/etc/network/interfaces" to a FAT partition of Pi's sdcard.
Take the card out and edit it on my laptop.
When booting, a shell command will "cp -f /boot/interfaces /etc/network" (overwrite)

Will it do, or is there more elegant method? Thanks!

[DougieLawson]

Put all network defs in your wpa_supplicant.conf file and your system will automatically connect to the network in range.

[jbudd]

With the current version of Raspbian Jessie you should be managing wifi credentials in /etc/wpa_supplicant/wpa_supplicant.conf.

On bootup it looks for a wpa_supplicant.conf file in /boot (which is writable on your PC). If it finds one, it copies it to /etc/wpa_supplicant/ and deletes the original.

This gives a nice easy way to input the details of new networks:

sudo cp /etc/wpa_supplicant/wpa_supplicant.conf /boot/supplicant.txt

Now on your PC add the new network to the file "supplicant.txt" and copy it as wpa_supplicant.conf
A basic wifi stanza might look like this

Code: Select all

network={
        ssid="MuseuDoAmanha"
        psk="CidadeMaravilhosa"
}

but there are many other parameters available for different network authorisation methods

When you boot the Pi, with a little luck it will connect.

[Powershell]

Thanks! That makes sense!

At what stage it is better to invoke this?