Ethernet Shield v4.0

Ethernet Shield v4.0 description:

The Arduino Ethernet Shield allows an Arduino board to connect to the internet. It is based on the Wiznet W5100 ethernet chip.

The Wiznet W5100 provides a network (IP) stack capable of both TCP and UDP. It supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet using the shield. The ethernet shield connects to an Arduino board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top.
Ethernet Shield v4.0

Ethernet Shield v4.0 specification:

  • PWR: indicates that the board and shield are powered
  • LINK: indicates the presence of a network link and flashes when the shield transmits or receives data
  • FULLD: indicates that the network connection is full duplex
  • 100M: indicates the presence of a 100 Mb/s network connection (as opposed to 10 Mb/s)
  • RX: flashes when the shield receives data
  • TX: flashes when the shield sends data
  • COLL: flashes when network collisions are detected

Ethernet Shield v4.0 pinout:

Ethernet Shield v4.0 pinoutNote:
SPI signals picked up from the ISP header


For more detail: Ethernet Shield v4.0

READ  Getting Data From The Web – Arduino + Ethernet

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