Waveshare Modbus RTU 32-Ch Relay Module, RS485 Interface, With Multiple Isolation Protection Circuits Arduino 16X2 LCD Keypad Shield ```html ESP32 Development Board (30

```html ESP32 Development Board (30 Pin)

Smart Lock Applications: Embedded in residential and commercial smart locks where the module's low power consumption enables battery operation for 6-12 months while providing secure single-factor or multi-factor authentication

75mm with tolerance of +/- 0

For true night vision

ensure the output shaft coupling is secure and balanced to prevent vibration and premature gear wear

Waveshare Modbus RTU 32-Ch Relay Module, RS485 Interface, With Multiple Isolation Protection Circuits Arduino 16X2 LCD Keypad Shield ```html ESP32 Development Board (30```html Waveshare Modbus RTU 32 Ch Relay Module, RS485 Interface, With Multiple Isolation Protection Circuits Take command of large scale automation with this industrial grade Waveshare 32 Channel Relay Module featuring Modbus RTU protocol over RS485 interface. Designed with multiple isolation protection circuits for rock solid reliability, this module is ideal for smart building management, industrial control panels, and agricultural automation