If you’re renaming your network or taking your OctoPi & Printer on the road you may need to change the name and credentials of the Wifi network to work. It’s not hard to do but you will need to connect to the Raspberry Pi console directly. This is when having the Raspberry PI LCD screen comes in really handy.
Once you’re looking at the Raspberry Pi console the network setup file is in
/boot/octopi-network.txt sudo nano /boot/octopi-network.txt
You will recognize this file from initial setup. Just change the name and password to the new network and reboot.