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Ethernet Shield V1.0

Ethernet Shield instantly enables internet connectivity for Arduino projects. An on-board Wiz5100 ethernet controller handles up to four TCP and UDP connections, just stack it onto an Arduino to create your own networked devices. Easily check connection status with on board indicator lights. Extend your design further with two extra rows of pin header that connect to shields and prototyping boards.

Model: ARD124B2P


  • Standard Arduino and Arduino Mega compatible

  • Arduino Ethernet Library compatible

  • Standard RJ45 ethernet Jack

  • 16K byte internal buffer

  • Indicator LEDs for all functions

  • Easy to access reset button

  • Standard pin headers for 0.1" grid prototyping boards

  • Up to 4 TCP/UDP network connections


Supported ConnectionTCP/UDP/
Net Weight24.2g

Interface Function

RJ45 - Ethernet Port

Power LED - Power

RST LED(red) - Red when Reset

LINK LED - Always ON when link is ok and flashes while in a TX or RX stat

SPD LED - Light indicates the link speed is 100Mbps

FDX LED - Light indicates the status of full-duplex mode.

Coll LED - Light indicates the presence of collision activity

Rx LED - Light indicates the presence of receiving activity

Tx LED - Light indicates the presence of transmitting activity

Reset KEY - Reset Ethernet shield and Arduino when pressed

Pins usage on Arduino

D0 - Unused

D1 - Unused

D2 - Connects the INT pin of the W5100

D3 - Contral the reset of the W5100

D4 - Unused

D5 - Unused

D6 - Unused

D7 - Unused

D8 - Unused

D9 - Unused

D10 - Used for SPI Chip Select

D11 - Used for SPI MOSI

D12 - Used for SPI MISO

D13 - Used for SPI SCK

D14(A0) - Unused

D15(A1) - Unused

D16(A2) - Unused

D17(A3) - Unused

D18(A4) - Unused

D19(A5) - Unused


Hardware Installation

Connect the ethernet shield with internet via RJ45 connector, and Arduino with PC via USB cable. Insert ethernet shield onto Arduion board:


  • Open the Arduino IDE(1.0), open the WebServer example in the Ethernet library:

  • Select the corresponding Arduino board, like Arduino UNO or Duemilanove or others, in: Tools- Board; Select COM port you are using in: Tools- Serial port.

  • Open your web browser and input the web address:, you will see the operation result of the arduino board as web server:

Version Tracker

v1.0V1.0 Release2012/3/29

Schematic Online Viewer


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