I have a HA install already, but I’m setting up a redundant backup machine in the form of a Pi3B.
I’ve etched the 32bit image for Hassio onto my SD card, but I need to go straight to Wifi as my Pi can’t have an ethernet cable (and I can’t get it to one easily for install).
So, I have a USB stick, formatted to FAT32 and volume name of CONFIG with a folder called network and in the folder a file called my-network containing the following. I’ve made sure it’s saved as Unicode 8 and with LF breaks.
I’ve put both the SD and USB into the Pi3B, switched it on and nothing appears on my network with the IP address or any other IP address.
[connection]
id=hass-backup
uuid=72111c67-4a5d-4d5c-925e-f8ee26efb3c3
type=802-11-wireless
[802-11-wireless]
mode=infrastructure
ssid=MYSSID
# Uncomment below if your SSID is not broadcasted
#hidden=true
[802-11-wireless-security]
auth-alg=open
key-mgmt=wpa-psk
psk=PASSWORD
[ipv4]
method=manual
address=192.168.1.7/24;192.168.1.1
dns=8.8.8.8;8.8.4.4;
[ipv6]
addr-gen-mode=stable-privacy
method=auto