-ES1 is an Ethernet module with SPI interface, the interface level is 3.3V TTL level, the power supply voltage is +3.3V, the current is not less than 200mA, the voltage is continuously stable +3.3V, and the pins are compatible with Wiznet's module WIZ820io. -ES1 embeds Wiznet's W5500 chip, uses hardware logical gates to implement the transport layer and network layer of the TCP/IP protocol stack (e.g.: TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE and other protocols), and integrates the data link layer, physical layer, and 32K bytes of on-chip RAM are used as data receiving and sending buffers. This allows the computer's main control chip to only perform the processing task of TCP/IP application layer control information. This greatly saves the workload of the computer for data replication, protocol processing, and interrupt processing, and improves system utilization and reliability. During operation, users can use W5500 as an external RAM for the MCU. The external interface of W5500 is a universal 80MHz high-speed SPI, which is available for various platforms to expand high-speed Ethernet solutions. Size: 26x24x17mm Material: PCB Color: As shown Package Contents: 2 x Module Only the above package content, other products are not included.