This app can control of light and climate at my home. I used a microcontroller ESP8266 with a relay module for turn on/off light. For control of climate, I also used a microcontroller ESP8266 with sensor BME/BMP280. Firmware for ESP, you can find in my Github repository for ESP8266_Smart_light here and for ESP8266_Smart-climate-control here. This app use Java 21, Spring Boot, Spring Security, Spring Web, Spring DATA JPA, Thymeleaf, Lombok, MySql. Using these technologies I implemented user registration, web interface and REST API.