O WIZnet Ethernet HAT é uma placa pino compatível com Raspberry Pi Pico que utiliza o controlador W5100S

Includes W5100S
     -Supports Hardwired Internet Protocol: TCP, UDP, WOL over UDP, ICMP, IGMPv1/v2, IPv4, ARP, PPPoE
     -Supports 4 Independent Hardware SOCKETs simultaneously
     -Internal 16 Kbytes Memory for TX/RX Buffers

Operation Voltage 3.3V/5V
    - Built-in LDO (LM8805SF5-33V)

SPI Interface
    - 5V I/O tolerance

10/100 Ethernet PHY embedded

Supports Auto Negotiation
    - Full/Half Duplex
    - 10/100 Based

Build-in RJ45 (RB1-125BAG1A)