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EOE-W55RP20

EOE-W55RP20 is a compact Serial-to-Ethernet module based on the WIZnet W55RP20. Network processing is handled by the hardwired TCP/IP engine, so the MCU core is available for the application. Serial-to-Ethernet firmware is pre-loaded, so the module can be used in industrial equipment without additional firmware development.

Serial to Ethernet

Up to 2x TTL UART with full modem control

10/100Mbps Ethernet

Integrated W5500 hardwired TCP/IP, IPv4

3.3V, -40℃ to 85℃

3.3V single rail, on-module clocks

18.3 x 26.15 mm

70-pin castellated interface, 1.1mm pitch

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DatasheetDatasheet Docs

Key Features

W55RP20 MCU

Dual-core Arm Cortex-M0+ up to 133MHz, 2MB flash, integrated W5500

Protocol Support

MQTT / MQTTS, SSL/TLS, and Modbus RTU/ASCII

Flexible Configuration Options

Configured via AT commands, Configuration Tool, and WIZ VSP (Virtual Serial Port)

Custom Firmware Service

Firmware and protocol customization through WIZnet Custom Service

Features

  • Serial-to-Ethernet system-on-module based on W55RP20 (dual-core Arm Cortex-M0+ up to 133MHz, integrated W5500, 2MB flash)
  • 10/100Mbps Ethernet with hardwired TCP/IP, IPv4
  • Host interface: UART or SPI, selected by SPI_IF_SEL
  • Up to two TTL UART channels with full modem control (TXD, RXD, RTS, CTS, DTR, DSR)
  • Serial protocols: MQTT / MQTTS, SSL/TLS, Modbus RTU/ASCII
  • Configuration via serial AT commands or the Configuration Tool, WIZ VSP supported
  • SWD and a separate Debug UART, native USB signals exposed
  • On-module 12MHz oscillator and 25MHz crystal, no external clock required
  • 3.3V single rail (1.1V core generated by the internal regulator)
  • Operating temperature -40℃ to 85℃
  • Unique WIZnet MAC address pre-assigned
  • 18.3 x 26.15 mm, 70-pin castellated edge interface, 1.1mm pitch

Specifications

ItemSpecification
TypeSerial-to-Ethernet System-on-Module
Main deviceW55RP20: dual-core Arm Cortex-M0+ MCU up to 133 MHz, integrated W5500, and 2 MB flash
Ethernet10/100 Mbps Ethernet, IPv4
Host interfaceUART or SPI, selected by SPI_IF_SEL
Serial interfacesUp to two TTL UART channels with full modem control (TXD, RXD, RTS, CTS, DTR, DSR)
Serial protocolsMQTT / MQTTS, SSL/TLS, Modbus RTU/ASCII
ConfigurationSerial AT commands or the Configuration Tool; WIZ VSP (Virtual Serial Port) supported
DebugSWD and a separate Debug UART
USBNative USB signals exposed on the module interface
On-module clocks12 MHz oscillator (MCU core) + 25 MHz crystal (Ethernet PHY), no external clock required
Supply3.3 V single rail; the 1.1 V core rail is generated by the W55RP20 internal regulator
Operating temperature-40 ℃ ~ +85 ℃
MAC addressUnique WIZnet MAC address pre-assigned
Size18.3 x 26.15 mm
Pin pitch1.1 mm
Module interface70-pin castellated edge interface (23 / 12 / 23 / 12 across the four sides)

Custom Firmware Service

Firmware and protocol customization for EOE-W55RP20 is available through WIZnet Custom Service.

  • Serial-to-Ethernet conversion
  • Up to two serial ports (module pins are TTL, so RS-232 and RS-422/485 need a transceiver on the carrier board)
  • Modbus RTU and Modbus TCP
  • TCP, UDP, MQTT, HTTP/S, and TLS/SSL
  • Serial baud rate up to 4 Mbps

Documentation

This section provides key documentation, including the datasheet and configuration guide.

Name Description Notes
Datasheet Hardware specification and module interfaces - EN link 한국어 link
Configuration Tool Guide Configuration Tool setup and use - EN link
EOE-W55RP20-EVB Evaluation board for EOE-W55RP20 - EN link

Evaluation Boards & Related modules

Complementary WIZnet solutions with diverse interfaces and performance levels

Related Modules

W55RP20link

The W55RP20 chip, the first in the ioNIC series, offers unparalleled IoT connectivity with advanced security, low power consumption, and high-speed data processing. Ideal for both consumer and industrial applications.

EOE-W55RP20

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