Yes. It can be used without network capabilities.

The software works with an ethernet connection using a USB on-the-go adapter and USB ethernet adapter, and that's how I do development.

Unfortunately, there is a mechanical limitation that prevents the models that I make over ethernet. The connector for the LCD screen blocks access to the USB micro port.

If you go without a screen, you could use an USB ethernet adapter.

It'd be pretty weird to have a thermostat with no UI and it'd put you in a weird situation where a network outage would stop you from adjusting the thermostat, but it's doable.

In summary you've got three options for a WiFi-free HestiaPi:

- dumb thermostat

- screenless thermostat

- DIY hardware and using the HestiaPi software

By default the pi will serve up a wifi access point for the initial setup, but if you hop on the community forums, we can help you disable that.