Below you will find a list with useful downloads or link to resources
The Smart Thermostat Android App
You can download it from the Play Store

Sketches
Download the last version from the sketches from the following link:
Box for the relay node
Thank to David de Laet, who designed a box, with a wall-mount for the relay node. You can download the files and print them with a 3D printer:
Wall mount for the relay box Lid for the relay box Relay box Relay box designed by David de Laet, to contain an esp32 and a relay. You can print it with a 3D printer. .
Arduino Ide
You will need the Arduino IDE to compile and transfer the sketches to the ESP32. Download it here.