WIZnet Ethernet HAT for Pico

WIZnetSKU: 104823
Sale price £4.90
incl. VAT
excl. VAT
In stock

Compatible with:

Awesome Extras

Raspberry PiRaspberry Pi Pico W
Sale priceFrom £5.80 incl. VAT excl. VAT
Raspberry PiRaspberry Pi Pico
Sale priceFrom £3.80 incl. VAT excl. VAT
The Pi HutMale Header Set for Raspberry Pi Pico
Sale price £1 incl. VAT excl. VAT

The WIZnet Ethernet HAT is a Raspberry Pi Pico add-on board that utilizes the W5100S embedded internet controller chip to provide an Ethernet connection to your Raspberry Pi Pico via SPI.

The board supports both 3.3V & 5V and can be mounted directly to your Pico as the HAT pinout matches the Raspberry Pi Pico pin footprint (the board comes with a pair of female headers but we also stock male and stacking sets)

About the W5100S Embedded Internet Controller

The W5100S is an embedded Internet controller designed as a full hardwired TCP/IP with WIZnet technology. W5100S provides internet connectivity to your Pico by using SPI (Serial Peripheral Interface). SPI provides an easy connection via external MCU to W5100S. The clock speed of W5100S SPI supports up to 70MHz.

Since the W5100S integrates the hardwired TCP/IP stack with 10/100 Ethernet MAC and PHY, it is truly a one-chip solution for stable internet connectivity. WIZnet’s hardwired TCP/IP stack supports TCP, UDP, IPv4, ICMP, ARP, IGMP, and PPPoE - and it has been proven through various applications over the last decade.

The W5100S provides four independent sockets to be used simultaneously and 16KB internal memory for data communication. Users can develop an Ethernet application easily by using the simple W5100S socket program instead of handling a complex Ethernet Controller. W5100S also provides WOL (Wake on LAN) and a Power Down Mode in order to reduce power consumption.


  • Utilises the W5100S embedded internet controller
  • Supports Hardwired Internet Protocols: 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
  • Built-in RJ45 (RB1-125BAG1A)


WIZnet Ethernet HAT for Pico Pinout

Pin Description

I/O Pin Name Description
P VBUS Power supply, 4.3~5.5 Voltage
P 3V3 Power supply, 3.3 Voltage
P GND Power ground
I INTn W5100S Interrupt Low activity.
I RSTn W5100S Reset: Low activity
I SPI0 TX SPI MOSI (Master Out Slave In)
I SPI0 CSn SPI Slave Select
O SPI0 RX SPI MISO(Master In Slave Out)


Package Contents

  • 1x WIZnet Ethernet HAT
  • 2x 20-pin female headers

Raspberry Pi Pico not included

Payment & Accreditations

Payment methods
Visa Mastercard Maestro PayPal Amazon Klarna

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.