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WIZ140SR is an embedded module based on WIZnet W5300 &  ARM Cortex-M3. It support up to four serial device.

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  • Serial to Ethernet Module based on W5300 & Cortex-M3
  • Pin-header mounted module
  • Serial signals : TXD, RXD, RTS, CTS, GND signals (4 UART/RS-232C)
  • Support the configuration method of AT command & Configuration tool program
  • 10/100Mbps Ethernet & Max.115.2kbps serial speed
  • Support WIZ VSP (Virtual Serial Port) program

Hardware Specification

  • Pin Header Connector Type : 2.5mm Pitch (1×14, 2×14)
  • Dimension (mm) : 48 x 36 x 16
  • Input Voltage : 3.3V
  • Max. Power Consumption : 250mA
  • Operation Temperature : 0 ~ 70℃
  • RoHS, SVHC Compliant


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

Pin Assignment


USER MANUAL WIZ140SR & WIZ145SR User’s Munual v2.0.1
DATASHEET WIZ140SR & WIZ145SR Datasheet v1.00
FIRMWARE Firmware v1.6.5
 CONFIG-TOOL WIZ140SR /WIZ145SR Configuration Tool for Windows v1.7
  • Last Update: 2015.01.07
 DEVICE TERMINAL Device Terminal Program for Windows 
  • Last Update: 2015.08.05
  • Simple Configuration & Testing for WIZnet Serial to Ethernet Module

WIZVSP WIZVSP Program for Windows

  • Last Update: 2017. 04. 28
  • Virtual Serial COM Port program: It can be used to change the device that is connected to the PC through the existing serial interface to control by the remote Ethernet network.
  • If you agree with the End User License Agreement for WIZVSP, you will be able to download the program and get a registration key. When registering the product with license agreement, the MAC address of the product in use and the email address of the contact person are required.

Hardware Design Guide

Reference Schematic Reference Schematic for WIZ140SR & WIZ145SR V1.0


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WIZ140SR is an embedded module based on WIZnet W5300 &  ARM Cortex-M3. It support up to four serial device.