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W5100S-EVB Library and Examples
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Loopback Update May 4, 2018

W5100S EVB

  • W5100S chip development platform for net'enabled microcotroller applications
  • Ethernet (W5100S Hardwired TCP/IP chip) and 32-bit ARM® Cortex™-M3 based designs
  • Arduino Pin-compatible platform hardware
  • New Code Samples: Updated network protocol libraries and example projects


For more details, please refer to W5100S-EVB page in WIZnet Wiki.


  • WIZnet W5100S Hardwired TCP/IP chip

    • Hardwired TCP/IP embedded Ethernet controller
    • Parallel Host Interface (External BUS Interface)
    • SPI (Serial Peripheral Interface) Microcontroller Interface
    • Hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE protocols
    • Easy to implement of the other network protocols
  • STMicroelectronics STM32F103VCT6 MCU

    • 32-bit ARM® Cortex™-M3 microcontroller running at up to 72MHz
    • 256kB on-chip flash / 48kB on-chip SRAM / Various peripherals
  • Pin-compatible with Arduino Shields designed for the UNO Rev3

  • 2 x Push button switch(SW), 1 x RGB LED

  • 1-Channel 10/100Mbps Ethernet Connector (RJ-45 with transformer) – (If you want to RJ-45, Contact us)

  • Micro USB B connector and 5-pin(2.54mm) Cortex debug connector for SWD(Serial Wire Debug)

  • W5100S-EVB Arduino Compatible Pinout W5100S-EVB Arduino Compatible Pinout

  • W5100S-EVB External Pinout(left) W5100S-EVB External Pinout(left)

  • W5100S-EVB External Pinout(Right) W5100S-EVB External Pinout(Right)


These are libraries source code and example projects based on Ecplipse & TrueSTUDIO IDE.

Requried Libraries are as below.

  • Folder list
    • ioLibrary_Driver (WIZnet W5100S-EVB ethernet library and protocols)
    • CMSIS
    • CMSIS_boot
    • stm_lib (STM Library)
    • syscalls
  • File list
    • main.c
    • HALInit.c
    • HALInit.h
    • msgq.c
    • msgq.h
    • serialCommand.c
    • serialCommand.h
    • W5100SRelFunctions.c
    • W5100SRelFunctions.h

Example projects are as below.

  • Loopback

ioLibrary GitHub Repository

  • ioLibrary : Latest WIZnet chip drivers and protocol libraries for developers

For more details, please refer to W5100S-EVB page in WIZnet Wiki.

Hardware material, Documents and Others

Various materials are could be found at W5100S-EVB page in WIZnet Wiki. And refer to this link W5100S Hardware data

  • Documents
    • Getting Started: Hello world! / Downloading a new program
    • Make New W5100S-EVB Projects
  • Technical Reference
    • Datasheet
    • Schematic
    • Partlist
    • Demension
  • See also

Revision History

First release : May. 2018

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