WSAL15729 – RS232 – 485 TO ETH/en

Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The Waveshare RS232/485 TO ETH converts serial RS232 and RS485 signals into Ethernet TCP/IP traffic. Configuration is done through a web interface; the default IP is 192.168.0.7 and the default port is 1111. The device supports transparent forwarding as well as Modbus RTU/TCP conversion and allows up to eight simultaneous TCP client connections.

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Technical overview

Serial interfaces: RS232 (TXD/RXD) and RS485 (A/B) are connected in parallel and can be used simultaneously with Ethernet.
Network connection: An RJ45 Ethernet port connects the device to a switch, router, or directly to a PC via a single network cable.
Default network parameters: Factory IP 192.168.0.7, default subnet mask, TCP port 1111.
Web configuration: Access the device IP in a browser; default login is admin/admin (factory value).
TCP mode: The device can be configured as a TCP server (up to 8 clients) or as a TCP client; set the remote party IP and port accordingly.
AT command mode: Sending “++++” without preceding data activates the mode; confirmation is sent back as 'a', followed by “+OK”. To exit, send “AT+ENTM”.
Modbus conversion: Supports bidirectional conversion between Modbus TCP and Modbus RTU; the serial baud rate must match the connected unit (commonly 9600 or 115200).
Termination: A jumper enables a 120 Ω termination resistor for the RS485 line; correct wiring is T+ → A, T- → B.
Troubleshooting: If no data is received, check the RX indicator, compare serial parameters, and restart the device if needed; for network issues verify IP/ping and firewall settings.

Commands and examples – verify before use:

AT+ENTM

Notes and version constraints

The exact subnet mask and gateway depend on the local network plan and must be adjusted manually.
Modbus conversion requires additional gateway hardware or software; correct configuration requires protocol knowledge.
If the web interface is unreachable, IP addresses must be in the same subnet but with different node addresses (e.g., device 192.168.0.7, PC 192.168.0.8).
Firewall settings on the host may block TCP connections; SSCOM or debugging software must be added to firewall exceptions.
The exact AT commands other than “AT+ENTM” are not fully listed in the source; further commands require consulting the manufacturer.
Restart after network failures can be automated but requires custom monitoring logic; the source only mentions a manual restart as an immediate measure.

Source and revision record

RS232/485 TO ETH - Waveshare Wiki
Source revision: 96011
Captured: 2026-08-31T02:57:13+00:00
SHA-256: f4638477dd6950e866a5b1da4583cb3a4c826cb9f15dc6b132252213c29a0c05