Salus iT600 Python client

This project is a maintained fork/successor of:

- https://github.com/jvitkauskas/pyit600
- https://github.com/epoplavskis/pyit600

It incorporates and reworks feature ideas and code from Leonard Pitzu's
MIT-licensed fork:

- https://github.com/leonardpitzu/homeassistant_salus

The upstream MIT copyright and permission notices are preserved in LICENSE-MIT.
