First of all make sure your thermostat is configured properly in Thinka (see Thermostat) as a Thermostat. Now just say: "Hey Siri, set the temperature to 21 degrees". For more example see the Apple Siri website.
In case something is not clear or not working according to your expectation you can contact us, and we will provide instant feedback. We can be reached by email at support@thinka.eu, or by phone at +31-20-2420666
