- Central Controller includes: Ethernet W5100, Arduino Mega 2560, Arduino pro mini, Nrf24l01, Adapter 5v 2A, BUZZER, relay 3v3a, Button.

The central controller is responsible for controlling and managing all equipment.

Central controllers use wired networks to access the internet.

When the central controller encounters a problem, it will automatically restart.

3v3a relay and capacitors have a central controller reset function. It's like pulling out the power cord and plugging it in again. Because Nrf24l01 has no restart pins.

The box is made of PVC sheet.