
details
The Ethernet Shield is designed to allow the Arduino base module to connect to the internet easily as a standalone unit. The module carries an onboard WIZnet W5100 Ethernet chip, which provides a network (IP) stack capable of both TCP and UDP, as well as a standard RJ45 Ethernet jack. It supports up to four simultaneous socket connections. An Ethernet library writes sketches that connect to the internet using the shield.
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