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A dedicated MCU debugging interface is provided to support secondary development. The dual-channel Modbus network relay module is equipped with a and stable 32-bit MCU and a W5500 network chip featuring a full hardware IP protocol stack. Utilizing the standard Modbus RTU communication protocol, the module enables the control of two relay outputs within a local area network (LAN) and is suitable for power control applications in wired network environments. Features an onboard, , and stable 32-bit MCU: the STM32F103C6T6 chip; The module's IP address can be viewed via the serial port; the UART communication baud rate is 115200.