Differential thermostat

Hi everyone,
Just wanted to share my version of standalone differential thermostat used to warmup water temperature in Spa: GitHub - miki71yu/ESPhome_differential_thermostat: Standalone Differential thermostat for solar or similar applications. Working with Home assistant.
Can be used for most heating applications, probably with some modifications.
DS18b20 Dallas temperature sensors and ESP32 used.
Many thanks to dzOny: GitHub - dz0ny/esphome-differential-thermostat: A thermostat-like device used for solar or wood chip-based furnaces to control your water boiler heating.
Any suggestions for improvement are welcome.
Cheers