Feature: 1. When using, we can upload the corresponding program on the control board to realize a simple web server. 2. At the same time, the expansion board also supports mini memory card, small memory card, the maximum support memory is 1G to read and write. (without memory card) 3. This expansion board adopts a stackable design and can be directly plugged into the control board. At the same time, our other expansion boards can also be plugged into this expansion board. 4. W5500 full hardware TCP/IP protocol network chip, supports high‑speed SPI bus (SPI mode 0, 3). 5. Built‑in 10/100Mbps Ethernet physical layer, internal 32K byte memory as TX/RX buffer. 6. Support hardware TCP/IP protocol: TCP, UDP, ICMP, IPv4ARP, IGMP, PPPoE. 7. Support auto answer, multiple indicator signal output (full duplex/half duplex mode), support sleep mode and wake on LAN. Specification: Item Type: Network Expansion Board ModuleMaterial: Synthetic cardboard Purpose: The keyes W5500 network expansion board is equipped with a network module with W5500 as the core, which can be used as a simple Web server or digital and analog interfaces for reading and writing through the network. Input Voltage: DC5V Working Voltage: DC3.3V Working Current: About 380mA Maximum Power: 3W Working Temperature: -55℃~+75℃ Compatibility: for development board Network Transformer Interface Type: RJ-45 interface Female Header Spacing: Approx. 2.54mm / 0.1in Fixed Hole Diameter: Approx. 3mm / 0.12in. Package List: 1 x Network Expansion Board Module