WIZ120SR-EVB is a evaluation board for WIZ120SR.

WIZ120SR is an embedded module based on WIZnet W5100 &  ARM Cortex-M3. WIZ120SR is the protocol converter that transmits the data sent by serial equipment as TCP/IP data type, and converts back the TCP/IP data received through the network into serial data to transmit back to the equipment. WIZ120SR is able to communicate two serial equipments at the same time by supporting 2 serial ports(3.3V LVTTL).


Hardware Specification

[WIZ120SR Module]

  • TCP/IP : W5100
  • PHY : Embedded in W5100
  • MCU : ARM Cortex-M3 (STM32F103C8T6)
  • Serial : 2 UART (3.3V LVTTL)

[Base Board]

  •  Module Interface : 1×14 2mm Pin Header (Female)
  • Ethernet Interface : RJ-45 (RB1-125BAG1A, Transformer integrated)
  • Serial Connector : 2x D-SUB, 9PIN (Right Angle, Male)
  • Power : DC Jack mounted (Outer 3.5 Ø, Inner 1.35 Ø)


  • UTP LAN Cable (2M), WIZ108SR-CBL (connection cable between module & base board)
WIZ120SR-EVB Interface

WIZ120SR User’s Munual v1.1.0

  • Last Update: 2013.06.19

Firmware v1.4.0

  • Last Update: 2015.08.18
  • Ethernet to Serial Data Transmission problem has been fixed:
    The Ethernet data was not transmitted to the designated serial port. This problem sporadically occurred without any rule.

Firmware v1.3.0

  • Last Update: 2013.04.18
  • Bug fixed : When set (Databits : 7),(Parity:odd/even) in UART2, WIZ120/125SR sent wrong data
Hardware Design Guide

WIZ120SR Interface Board Schematic

  • Last Update: 2013.03.31
  • WIZ120SR Pin Specification Rev. A
  • WIZ120SR Baseboard Rev. 1.0 Reference Schematic

WIZ120SR/ WIZ125SR Config Tool for Windows v1.3

  • Last Update: 2013.04.18
  • WIZ120SR/ WIZ125SR Config Tool Program Installation Package
  • WIZ120SR/ WIZ125SR Config Tool Source Code

Device Terminal Program for Windows 

  • Last Update: 2015.08.05
  • Simple Configuration & Testing for WIZnet Serial to Ethernet Module