Introduction 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. ![enter image description here][1] Features 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 Specification Item Min Typical Max Unit Voltage 3.5 5 5.5 V Current 120 210 350 mA Demension 72.6x58.4x23.2 mm Supported Connection TCP/UDP / Net Weight 24.2 g Interface Function ![enter image description here][2] 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: ![enter image description here][3] Software ![enter image description here][4] 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:192.168.1.177, you will see the operation result of the arduino board as web server: ![enter image description here][5] [1]: /editor/20160112/5694ad238e94c.png [2]: /editor/20160112/5694ad784a20a.png [3]: /editor/20160112/5694ada87c2b4.png [4]: /editor/20160112/5694adba17c93.png [5]: /editor/20160112/569463e7ecd12.png