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Return to BlogArduino Based Ethernet Shield
Posted Feb 07, 2012 at 10:44 am
Figure 1
The device is used for open connection to other internet hosts with the use of Ethernet chip Wiznet W5100 that provides a stack of network IP capable of both TCP and UDP protocol.
There are four socket connections that are supported simultaneously while utilizing W5100 chip. Using long wire-wrap headers, the Ethernet shield can be connected to an Arduino board. Another shield may be allowed to be stacked on top while keeping an intact pin layout.
To communicate with the W5100, the digital pins 10 to 13 are being used by Arduino, where the pins are not suitable for use as I/O. A standard Ethernet jack in the form of RJ45 is being provided by the shield. Both the Arduino board and the W5100 can be reset using the reset button on the shield.
There are numerous LEDs that are used to provide the necessary indications such as collisions (COLL), transmitter (TX), receiver (RX), 100mbps network connection (100M), full duplex (FULLD), network link (LINK), and power (PWR). To permit the Arduino board to receive interrupt-driven notification of events from the W5100, a jumper INT is used to connect to Arduino pin 2.
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