DFRobot – DFRduino Ethernet Shield V2.1 Support Mega and Micro SD – DEDB0141

The DFRduino Ethernet Shield V2.1 is now out! This version of Ethernet shield is not only compatible with Mega 1280 and 2560, but also has a micro SD card slot for reading/writing. The dfrduino Ethernet Shield V2.1 is fully compatible with Ethernet Shield. With the official Ethernet library, you can do exactly the same as the original, but at a more affordable price. This Ethernet shield provides an Arduino controller board with internet access. It is based on the Wiznet W5100 Ethernet chip. The Wiznet W5100 forms a stackable network (IP) capable of TCP and UDP. It supports up to four simultaneous connections.

You can use the Ethernet library to write sketches that connect to the Internet using the shield. You can connect the Ethernet Shield to an Arduino board using a Collettori long Wire Wrap that extends through the shield. This keeps the pin layout intact and allows another shield to be stacked on top. Arduino uses digital pins 10, 11, 12, and 13 (SPI) to communicate with the W5100 on the Ethernet shield. These pins cannot be used for I/O. The shield returns a standard RJ45 Ethernet socket. The shield reset button resets both the W5100 and the Arduino board.