2X CH9121 Serial Port Ethernet Network Module UART to RJ45 Converter 3.3V 5V STM32 TCP/IP Network Module

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• Module parameter configuration is divided into two parts: basic setting and port configuration, basic setting main include ,device name ,network parameter,serial port negotiation authentication function, serial port negotiation authentication function default is off status, defaulting through hardware CFG0 pin enter erial port setting mode,can through serial port negotiation enter serial port setting mode after open .
• TCP CLIENT mode: On the TCP CLIENT model ,after charge in the module,will take the initiative connected TCP SERVER terminal, when the connection is established, can achieve two-way transparent transmission of network data packets and serial port data , Under this mode, TCP SERVER ?s IP need to be visible to the module,so it means via module IP can direct PING connect server IP . under TCP CLIENT mode, support local serial port random,support through domain name access remote service area
• TCP SERVER mode: On the TCP SERVER mode,after charge in the module, Will listen to the local serial port whether have a client request connection, after the connection is established,can achieve two-way transparent transmission of network data packets and serial port data .under this mode,TCP CLIENT IP need to be visible to the module,The visible meaning is that the IP of the client can be directly ping through the client IP
• UDP CLIENT mode: On the UDP CLIENT mode,after charge in the module,will sent data to the local port (from the destination IP and port) transparently forwarded to the module serial port.Similarly,send to module serial port data will through UDP ways forwarded to set destination IP and port. Under this model, the module needs to configure network parameters there are: working mode, device IP, subnet mask, default gateway, device port. the destination IP address, destination port.
• UDP SERVER mode: On the UDP SERVER mode ,received send to local IP and port all data is forwarded to the serial port, send to module serial port data also through UDP way forwarded to Communicate with UDP?s IP and serial port ,Under this model, the module needs to configure network parameters there are: working mode, device IP, subnet mask, default gateway, device port.