Introduction
The W5500 Ethernet expansion board is a new member of the��DFRobot Ethernet family. It integrates PoE power supply and W5500 Ethernet chip, which can meet the requirements of general IoT projects.
The W5500 chip is a Hardwired TCP/IP embedded Ethernet controller that provides easier Internet connection to embedded systems. It enables users to have Internet connectivity in their applications just by using the single chip in which TCP/IP stack, 10/100 Ethernet MAC, and PHY are embedded. The Hardwired TCP/IP is the market-proven technology that supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE protocols. W5500 embeds the 32Kbyte internal memory buffer for the Ethernet packet processing. It���s faster and easier way rather than using any other Embedded Ethernet solution. Besides, the W5500���s SPI supports 80MHz speed and a new efficient SPI protocol for high-speed network communication. In order to reduce the power consumption of the system, W5500 provides WOL (Wake on LAN) and power-down mode.
With the same size as Arduino UNO, this W55expansion board adopts IEEE 802.3at standard-compliant POE Class 0 power classification and offers MicroSD card socket and 2 standard Gravity-4Pin I2C ports, 1 UART, 4 Gravity-3Pin digital ports and 4 analog ports, etc.
Functionally compatible with��Arduino Ethernet Shield 2

Interface Function