UART TTL to Ethernet Converter

SKU: 12161
Part Number: UART TO ETH
Brand: Waveshare


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UART TTL to Ethernet Converter, Easy-to-use, High-speed, Low-power, High-stability, Upgradable


The UART TO ETH module provides an easy way to communicate between UART and Ethernet, it can be configured via web page.


  • 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
  • Auto-reconnecting, provides a reliable TCP connection
  • Supports time-out reboot (no-data reboot), configurable reboot time
  • Flexible serial port data framing, allows kinds of customized packeting
  • Baudrate configurable, from 600bps up to 460800bps, supports five parity check options: None, Odd, Even, Mark, Space
  • Supports customized heartbeat packets, make sure the connection is truthful
  • Supports customized registration packets, detect the connection status, customizable packet header, make the register packets with selected MAC address
  • Supports customized web page, 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
  • 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
  • Available working modes: TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client
  • Supported protocols: IP, TCP, UDP, ARP, ICMP, DHCP, DNS, HTTPD Client
  • Configurable via web page, AT commands, serial protocol, and network protocol, provides configuration protocol which can be integrated to your own software
  • 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.


  • Protection: built-in 1.5KV electromagnetic isolation
  • Interface: 3.3V TTL (2.54mm pitch pinheader)
  • Power supply: 3.3V DC or 5V DC (via different pin)
  • Operating current: 150mA (avg)/160mA (max)
  • Operating temperature: -25~75°C
  • Power consumption: <1W
  • Storage condition: -40~105°C, 5~95%RH
  • Dimension: 50.5 x 22.6 x 15 (mm)


Bi-direction transparent transmission between TTL and wired Ethernet:

Extend the communication distance for serial devices:

Manage multi serial client devices remotely via one web server:

Manage serial server remotely via multi web clients:


UART TO ETH dimensions

Development Resources

Wiki :

Selection Guide

ComparisonUART TO ETHRS485 TO ETHRS232/485 TO ETH
Processor Cortex-M0 Cortex-M0 Cortex-M4 (up to 120MHz frequency)
Ethernet RJ45 (10/100Mbps self-negotiation)
Protocol: IP, TCP, UDP, ARP, ICMP, DHCP, DNS, HTTPD Client 
Cache: TX 6Kbyte, RX 4Kbyte Cache: TX 16Kbyte, RX 16Kbyte
Serial UART RS485 RS232+RS485 (allow to work at the same time)
Baudrate: 600bps~460.8Kbps Baudrate: 600bps~230.4Kbps
Hardware flow: NOT supported Hardware flow: supported
Data bit: 5, 6, 7, 8
Stop bit: 1, 2
Parity bit: None, Even, Odd, Space, Mark
Cache: RX 800byte Cache: TX 2Kbyte, RX 2Kbyte
Framing condition: 4 byte time interval, or 400 byte in length Framing condition: 4 byte time interval, or customizable 0~1460 byte in length
Features customized heartbeat packets, customized registration packets, customized webpage, RFC2217-like protocol, KeepAlive, timeout auto reboot, short connection, firmware upgrade via network
Modbus is not supported Modbus gateway, Websocket (webpage to serial)
Working Modes TCP Server, TCP Client, UDP Server, UDP Client, HTTPD Client
Client Count on TCP Server mode, customizable 1~16 Clients on TCP Server mode, supports 2-ch Socket, 8 Clients per ch
Configuration Built-in webpage, Host computer config software, Serial commands
Interface Protection Power: reverse-proof, ESD protection, anti-surge
Ethernet: 1.5KV electromagnetic isolation
  RS485: 2KV ESD protection, 2.2KΩ pull up/down registers
    lightning-proof, over-current protection
Power Supply 3.3V/5V 5~7V 5~36V
Operating Current [email protected] [email protected] [email protected]
Temperature Operating Temperature: -25~75℃  Operating Temperature: -40~85℃ 
Storage Temperature: -40~105℃ 
Dimensions 50.5mm × 22.6mm × 15mm 70mm × 63.6mm × 25mm 82.8mm × 85.7mm × 25mm

Weight: 0.02 kg

Quick Overview

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