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The Arduino Ethernet Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip providing a network (IP) stack capable of both TCP and UDP. The Arduino Ethernet Shield supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet via a standard RJ45 Ethernet jack using the shield.
The latest revision of the shield adds a micro-SD card slot, which can be used to store files for serving over the network. It is compatible with the Arduino Uno and Mega (using the Ethernet library). You can access the on-board SD card slot using the SD library which is included in the current Arduino build.
The latest revision of the shield also includes a reset controller, to ensure that the W5100 Ethernet module is properly reset on power-up. Previous revisions of the shield were not compatible with the Mega and need to be manually reset after power-up. The reset button on the shield resets both the W5100 and the Arduino board.
Arduino communicates with both the W5100 and SD card using the SPI bus (through the ICSP header). This is on digital pins 11, 12, and 13 on the Duemilanove and pins 50, 51, and 52 on the Mega. On both boards, pin 10 is used to select the W5100 and pin 4 for the SD card. These pins cannot be used for general i/o. On the Mega, the hardware SS pin, 53, is not used to select either the W5100 or the SD card, but it must be kept as an output or the SPI interface wonâ€TMt work.
Note that because the W5100 and SD card share the SPI bus, only one can be active at a time. If you are using both peripherals in your program, this should be taken care of by the corresponding libraries. If youâ€TMre not using one of the peripherals in your program, however, youâ€TMll need to explicitly deselect it. To do this with the SD card, set pin 4 as an output and write a high to it. For the W5100, set digital
It's an Ethernet shield for the Arduino. Haven't had time to test mine but it appears well made and is an original Arduino Ethernet shield for the R3 series UNO / MEGA 2560 in the... Read morePublished 1 month ago by John S. Kjellman
The one that came is not arduino (different from the picture), came without a box (on an envelope) and with the pins bentPublished 5 months ago by Thomaz Cortes
This really is a Great Product and truly was Fast Service! I plan on ordering again! I recommend this product and vendor to anyone!Published 5 months ago by Peter Walker
Happy with it, but I though it was a bit pricey. Like the microSD card socket. Looks like a quality design.Published 6 months ago by LesFromIL
Ethernet shield that I have used on my arduino and used cacti to log data over the network. Works great, no problem, the code from the internet worked perfectly. Read morePublished 7 months ago by Richard
I plugged this onto my Uno, loaded a sketch and the ethernet portion worked without issue. I still have not used the SD card slot.Published 8 months ago by Steve
Christmas Gift: This is what my son specified and what I gave him. He was tickled. Hence, I am, too.Published 8 months ago by Sam F. Miller