Skip to main content



WIZ105SR is not discontinued, but we do not recommend it for new designs.

Technical support for this product has officially ended.

Please check WIZ750SR-105 instead.


WIZ105SR is the serial to Ethernet module using W5100 & 8051 MCU. WIZ105SR 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.


  • Serial to Ethernet Module based on W5100 & 8051
  • Pin-header type, RJ-45 mounted module
  • Serial signals : TXD, RXD, RTS, CTS, GND
  • Support the configuration method of AT command & Configuration tool program
  • 10/100Mbps Ethernet & Max.230kbps serial speed
  • Support WIZ VSP (Virtual Serial Port) program

Hardware Specification

  • Pin Header Connector Type : 2mm Pitch (6×2)
  • Dimension (mm) : 40(L) x 62 (W) x 17 (H)
  • Input Voltage : 3.3V
  • Max. Power Consumption : 200mA
  • Operation Temperature : 0~80℃
  • RoHS, SVHC Compliant


  • Configuration Tool for Windows
  • WizVSP: Virtual Serial Port (COM port) for User’s Programs

Pin Assignment



WIZ105SR User Manual v1.3.0

Last Update: 2017.02.28

English Version

WIZ100SR/ WIZ105SR/ WIZ110SR Programmer’s Guide

Last Update: 2013.06.19



WIZ100SR Firmware v5.13

  • Last Update: 2015.03.27
  • Improved the exception for infinite loop during using socket functions : Apply time-out mechanism
  • Bug Fixed : side effect of AT command

WIZ100SR Old Firmware

  • V5.11 (2015.01.21)
  • 5.10 (2014.01.14)
  • 4.32 (2013.11.21)
  • 4.31 (2013.01.30)
  • 4.1 (2012-04-03)


WIZ100SR /WIZ105SR /WIZ110SR Config Tool for Windows v3.0.2

  • Last Update: 2013.06.27
  • WIZ1xxSR Config Tool Installation Package
  • WIZ1xxSR Config Tool Source Code

Device Terminal Program for Windows

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

WIZVSP Program for Windows

Go to WIZ VSP Guide page

Hardware Design Guide

Reference Schematic for WIZ105SR V1.0
WIZ105SR PinHeader Description