RS485 to Ethernet Converter for EU

SKU: 16529
Part Number: RS485 TO ETH (for EU)
Brand: Waveshare


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Comes with EU plug power adapter. More options for the power plug: USEU

RS485 to Ethernet Converter, Easy-to-use, High-speed, Low-power, High-stability, Upgradable
* This module does not support Modbus TCP, if you need to use this function, please purchase RS232/485 TO ETH.


The RS485 TO ETH module provides an easy way to communicate between RS485 and RJ45 port Ethernet, it can be configured via webpage.


  • M0 series 32-bit ARM processor, fast speed, high efficiency
  • 10/100M Auto-MDI/MDIX ethernet interface, regardless of cross-over or straight-through cable
  • Configurable RS485 baudrate (600bps~230.4Kbps), supports five parity check options: None, Odd, Even, Mark, Space
  • Available working modes: TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client (supports GET and POST)
  • Configurable via webpage, AT commands, serial protocol, and network protocol, provides configuration protocol which can be integrated to your own software
  • Supports customized heartbeat packets, make sure the connection is truthful, as well as for actively retrieving sensor data
  • Supports customized registration packets, auto passing the registered packet as identifier after the connection is established, so that different devices can be distinguished
  • Supports customized webpage, allows user to customize the module configuration page
  • Supports RFC2217-like protocol, be able to communicate with devices whose serial setting (baudrate, data bit, etc.) may change
  • KeepAlive mechanism, detects broken connection, auto re-connecting
  • Supports time-out reboot (no-data reboot), ensures a long-term stable connection, configurable reboot time
  • Supports DNS domain name resolution, configurable DNS server
  • Supports DHCP, auto-obtained IP or static IP
  • Firmware is upgradable via the network
  • Restore to factory settings via software and/or hardware
  • Comes with default MAC address, which is customizable
  • Provided software: module configuration software, TCP/UDP testing tool, VCOM virtual serial port software
  • Example code: host computer (socket ), VB, C++, Delphi, Android, iOS, etc.


  • Ethernet:
    • Connector: 4-pin RJ45
    • Communication rate: 10/100Mbps
    • Interface protection: 1.5KV electromagnetic isolation
    • Protocols: IP, TCP, UDP, ARP, ICMP, DHCP, DNS, HTTPD Client
    • TX cache: 6Kbyte
    • RX cache: 4Kbyte
  • RS485:
    • Connector: screw terminal (A+, B-, GND)
    • Data bit: 5bit, 6bit, 7bit, 8bit
    • Stop bit: 1, 2
    • Parity bit: None, Odd, Even, Mark, Space
    • Baudrate: 600bps~230.4Kbps
    • RX cache: 800byte
    • Hardware flow control: none
    • Interface protection:
      • 2KV ESD protection
      • RS485 pull up/down registers: 2.2KΩ
  • Power:
    • Power supply: 5.0~7.0V (5V recommended)
    • Operating current: 150mA (@5V)
    • Power consumption: <1W
    • Interface protection: reverse-proof, ESD protection, anti-surge
  • Environment:
    • Operating temperature: -25~75°C
    • Storage temperature: -40~105°C


RS485 TO ETH dimensions

Development Resources

Wiki :

Selection guide
microcontroller Cortex-M0 Cortex-M0 Cortex-M4 ((Main frequency up to 120MHz)) CH9121
Ethernet 10/100Mbps auto-negotiation RJ45 connector
TX cache: 6Kbyte;
RX cache: 4Kbyte
TX cache: 16Kbyte;
RX cache: 16Kbyte
Serial port UART RS485 RS232 and RS485 UART
Baudrate: 600bps~460.8Kbps Baudrate: 600bps~230.4Kbps Baudrate: 300~921.6Kbps
Hardware flow control: none Hardware flow control: supported Hardware flow control: none
Data bit: 5bit, 6bit, 7bit, 8bit
Stop bit: 1, 2
Parity bit: None, Odd, Even, Mark, Space
RX cache: 800byte TX cache: 2Kbyte;
2 cache: 16Kbyte
Framing mechanism: 4-byte packing time, 400 byte length Framing mechanism: 4-byte packing time, 1600 byte length, configurable -
Featured Function Customized heartbeat packets, customized registration packets, customized webpage, RFC2217-like protocol, KeepAlive mechanism, time-out reboot, short connection, firmware is upgradable via the network KeepAlive mechanism, firmware is upgradable via the network
- Modbus Gateway, Websocket (Web to serial) -
working modes TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client TCP Server, TCP Client, UDP Server, UDP Client
Supported Clients For TCP Server, customisable of 1~16 connected Clients For TCP Server, supports 2-ch Socket, up to 8 Clients per channel For TCP Server, customisable of 1~8 connected Clients
Configuration webpage, host software, serial commands host software, serial commands
Isolation Protection Power: reverse-proof, ESD protection, anti-surge
Ethernet: 1.5KV electromagnetic isolation
- 2KV ESD protection, 2.2KΩ pull up/down registers -
- lightningproof, over-current protection -
Power Supply 3.3V/5V 5~7V 5~36V 3.3V/5V
Operating current 150mA@5V 110mA@5V 86.5mA@5V 140mA@5V
Operating temperature -25~75℃ -40~85℃
Storage temperature -40~105℃ -55℃~125℃
Dimensions 50.5 × 22.6 × 15mm 70 × 63.6 × 25mm 82.8 × 85.7 × 25mm 53 × 22mm

Weight: 0.225 kg

Quick Overview

  1. RS485 TO ETH x1
  2. 5V power adapter (EU plug) x1