I have HA OS on a rpi3 installed and connected both with ethernet and wifi.
But I want to delete the wifi connection or remove the wifi details.
In the UI doesnt work an nmcli also doesnt work in the community ssl addon
One wonders, why?
But here is how you do it:
Settings → System → Restart button → Advanced options → Shut down system
Wait for the Green “Activity” LED to stop blinking.
Remove the MicroSD card
Insert the MicroSD card into a card adapter on your PC
When you see: “You need to format the disk…”, click on “Cancel”
In Windows File Manager you will see two new drives: “hassos-boot” and “USB Drive”
Open the “hassos-boot” drive.
Edit the file: “config.txt” in a text editor (not MS Word or similar).
Add this to the end of the file
# Disable WiFi
dtoverlay=pi3-disable-wifi
Save the file and eject the drive.
Reinsert the MicroSD card into the Raspberry Pi and reboot.
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Isn’t is just (don’t need to specify pi3)…
dtoverlay=disable-wifi