Microcontrollers and electronics

Esp32 web bluetooth
https://randomnerdtutorials.com/esp32-web-bluetooth/ 
 https://blog.balena.io/using-web-bluetooth-to-communicate-with-bluetooth-devices/ 
 https://notificare.com/blog/2021/09/24/Quick-peek-into-the-Web-Bluetooth-API/ 
  

ESP32 with POE
https://mauser.pt/095-5973/lilygo-ttgo-t-internet-poe-downloader-placa-de-desenvolvimento-esp32-com-ethernet-e-poe-modulo-programador