Changing WiFi Settings on Raspberry Pi when away from home
If you set up your Pi at home with a WiFi dongle (in a robot say) and you take it off to a Raspberry Jam event (or into school to show your teacher) you soon find out that you can’t talk to your Pi using the WiFi at the venue.
There are many routes to go down at this point – the most popular being:
- Use a mobile phone as a WiFi hotspot with home WiFi settings
- Use a spare WiFi router with same home WiFi settings
The best way however, to avoid interference with other attendees would be to enter the venue WiFI settings into your Pi. However this is very difficult unless you have another Linux machine that can read/write your SD card as a Windows machine can’t do that.
One method I’ve come up with is to add a few lines of code at the end of your /etc/network/interfaces file :
iface eth0:1 inet static
and then use this command via LX Terminal
sudo apt-get purge ifplugd
And then re-boot.
What this then does is that it allows you to just plug an ethernet cat5 cable between a Windows laptop/netbook and your Pi when you get to the venue/school.
You can then remote into your Pi (using your normal methods) and change your WiFi settings to match up with the venue (Normally just simply editing /etc/wpa_supplicant/wpa_supplicant.conf and putting the venues WiFi name and password in)
Or if your Pi isn’t a robot and stays on the desk next to you, you can then just carry one using it without having to do anything else 🙂