1DHCP function can automatically obtain the IP address, and the IP address can be queried through the serial port setting protocol. 2It is more convenient to upgrade the firmware by upgrading the firmware function through the network. 3The working mode can be selected from TCP Server, TCP Client, UDP Client, UDP Server, and HTTPD Client. 4Parameters can be set via serial or network, providing a setup protocol for customers to integrate into their own software. 5Support virtual serial port, supporting the USR-VCOM virtual serial port software developed by others. USR-TCP232-302 is a device for transparent transmission of TCP network data packets or UDP data packets and RS232 interface data. The module is small in size, low in power consumption, equipped with ARM processor, fast in speed and high in stability. The internal integration of the TCP/IP protocol stack allows users to easily complete the network functions of embedded devices. It also adds some features in the industry and is convenient for customers to use, thus saving customers human and material resources and development time and enhancing competitiveness. This series of products has been rigorously tested and successfully applied in banks, highways, large corporate networks, busy networks with cameras, and complex network environments built through fiber-to-Ethernet. Features: DHCP function can automatically obtain the IP address, and the IP address can be queried through the serial port setting protocol. DNS server address can be customized. DNS function, which can resolve domain names. Web page parameter configuration function, set parameters through the web page. It is more convenient to upgrade the firmware by upgrading the firmware function through the network. 10/100M adaptive Ethernet interface, support AUTO-MDIX network cable cross-connect automatic switching. Serial port baud rate can be set from 600bps to 230.4Kbps, and supports five calibrations: None, Odd, Even, Mark, Space. The working mode can be selected from TCP Server, TCP Client, UDP Client, UDP Server, and HTTPD Client. Parameters can be set via serial or network, providing a setup protocol for customers to integrate into their own software. Support virtual serial port, supporting the USR-VCOM virtual serial port software developed by others. The custom heartbeat packet mechanism ensures that the connection is authentic and reliable, and the dead connection is eliminated. Customize the registration package mechanism to detect the connection status, or you can do a custom header. In TCP Server mode, the number of connected clients can be arbitrarily set between 1 and 16. The default is 4. The IP of the connected client can be displayed, and the data is sent/received according to the connection. The MAC address can be modified, and factory-write the world's only MAC address. Support hardware and software to restore factory settings. It can run across gateways, switches, and routers. Can work in the local area network, but also access to the external network. Provide PC programming examples (socket), for VB / C++ / Delphi / Android / IOS, etc. Specification: Input voltage: DC4.75-7.