Configuration
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MQTT Settings

Adds device's MAC address to the MQTT topics used to report and listen to the commands. Use this option if you have multiple Diyless thermostats bound to the same MQTT broker.

Adds OpenTherm requests/responses publish to the ~/ot topic

Heating Settings

For the underfloor heating system without a thermostatic valve - please set this value to some reasonable limit, i.e. 45°C. Too high temperature may damage your system.

Other Settings

To design our products better, we would like to gather your feedback based on your experience.

However, it is quite hard for us to contact most of our customers in person to get their feedback.

You can help us improve the quality, reliability, and performance of the products by participating in our Customer Experience Improvement Program.

If you accept, we collect statistical information about thermostat usage. Our products periodically send information about the performance of your installation of our software. This information is transmitted by using the Internet. We will use this information to improve the products and features customers use most often and to help solve problems. Participation in the program is voluntary, and the end results are software improvements to better meet the needs of our customers.

The uploaded data contains no information that identifies you or your company. There are no surveys to complete, and it all happens automatically—you’re never interrupted. You should experience no loss in performance. If the thermostat is not connected to the Internet, no data is sent. We do not share this information with other companies.

Heating Algorithm
PID Settings
Heating Curve Settings


Publish a temperature value to the '~/cmnd/things/thermostat/properties/outside_temperature' mqtt topic or a json message containing a 'outsideTemp' property to the '/api/set' REST endpoint at least every 15 minutes to update this sensor

Hysteresis Settings
Sensor Failure Settings
Display Settings