【USRES1】USR-ES1 is the Ethernet module of a SPI interface, interface is TTL level of 3.3V, power supply voltage of + 3.3V, please ensure that the current is not less than 200mA, voltage is continuous and stable + 3.3V. 【Compatible】 High speed SPI interface 80MHz; Hardware-TCPIP-protocol stack user built in, almost without understanding the complex network protocol knowledge; Supports up to 8 Socket. 【Design compact】 Support TCP, UDP, ICMP, IPv4, ARP, IGMP, PPPoE protocol; Integration of the data link layer, physical layer; Support the wakeup; Support high speed serial interface (SPI model 0, 3). 【Easy operation】 Internal 32K bytes receive buffer; The embedded 10BaseT / 100BaseTX Ethernet physical layer (PHY); Support auto negotiation (10/100-Based full duplex or half duplex). 【Fast delivery】 Fast and high quality delivery of Spain buying in TECNOIOT