
Description:
The Waveshare Industrial Serial Server is a high-performance RS232 data acquisition and IoT gateway designed for demanding industrial environments. This versatile module integrates multiple powerful functions in a single compact unit — including serial server, Modbus gateway, MQTT gateway, and RS232 to JSON conversion — making it ideal for a wide range of industrial automation and IoT applications.
Equipped with RS232 and Ethernet ports, it ensures reliable data transmission and seamless network integration. The screw terminal power input provides secure connections, while the compact rail-mountable case allows quick and easy installation in control cabinets or production lines.
Perfect for connecting and collecting data from various RS232 instruments and sensors, this device supports both local network collection and autonomous cloud uploading, enabling efficient and flexible data management in smart factories, monitoring systems, and IoT deployments.
Specification:
| Product | RS232 TO ETH (B) | RS232 TO POE ETH (B) |
|---|---|---|
| Product Type | Serial server, Modbus Gateway, MQTT Gateway | |
| Basic Function | Bi-directional transparent data transmission between RS232 and Ethernet | |
| Communication interface | RS232 port x 1, Ethernet port x 1 | |
| Power supply | 6 ~ 36V DC screw terminal | 6 ~ 36V DC screw terminal, or PoE port |
| Isolation Protection | Power isolation, Signal isolation | |
| Communication | ||
| Ethernet | common network port | PoE network port supports the IEEE 802.3af standard |
| 10 / 100M auto-negotiation RJ45 connector, 2 KV surge protection | ||
| Serial port | Isolated RS232 | |
| Serial specification | ||
| Baudrate | 300 ~ 115200 bps | |
| Parity bit | none, odd, even, mark, space | |
| Data bit | 5 ~ 9 bits | |
| Flow control | N/A | |
| Software | ||
| Protocol | ETHERNET, IP, TCP, UDP, HTTP, ARP, ICMP, DHCP, DNS | |
| Configuration | host, web browser, device management functions library | |
| Communication method | TCP/IP direct communication, VCOM | |
| Operating mode | TCP server, TCP client (coexisting with TCP server), UDP, UDP multicast | |
| Others | ||
| Operating temperature | -40℃ ~ 85℃ | |
| Humidity range | 5% ~ 95% relative humidity | |
| Dimensions | L × W × H: 87 × 36 × 59 mm | |

Features:
- Supports TCP server, TCP client, UDP mode, and UDP multicast. As a TCP client, it also supports TCP server-side functions. Supports 30 TCP connections as a TCP server and 7 destination IPs as a TCP client.
- Supports the baud rate of 1200~115200bps, the data bit supports 5~9 bits, and the parity bit can be no check, odd check, even check, mark, or space.
- Support the function of sending the MAC address on device connection, which is convenient for cloud management of devices.
- Provides a secondary development kit DLL development library for computer-side search and configuration of devices.
- Support Web browser configuration, support DHCP dynamic acquisition of IP, DNS protocol, and connection name server addresses.
- Support remote search for devices, configure device parameters, and upgrade device demos in the cloud.
- Support remote viewing of the TCP connection status, serial port data sending, and receiving the status of the device through software. The virtual serial port supports the data monitoring function.
Product Interface:


Multi-communication modes:
Supports TCP server / TCP client / UDP mode / UDP multicast


Useful Link:
Waveshare RS232 TO POE ETH (B)
Package Included:
1 x Waveshare Industrial RS232 to RJ45 Ethernet Serial Server Reliable TCP/IP Converter