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Adafruit

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Wireless is wonderful, but sometimes you need the strong reliability of a wired connection. The Ethernet FeatherWing adds quick and easy wired Internet to an...

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Wireless is wonderful, but sometimes you need the strong reliability of a wired connection. The Ethernet FeatherWing adds quick and easy wired Internet to any Feather board — just plug in a standard Ethernet cable and you're connected.

Built around the WIZ5500 Ethernet controller, this FeatherWing communicates over SPI plus a single CS pin, making it compatible with all Feather boards. The Arduino Ethernet2 library handles DHCP setup automatically within seconds of connecting. The RJ-45 jack includes both link and activity LEDs to show your current connection status at a glance.

Key Features

  • WIZ5500 Ethernet Controller – Reliable, hardware-based TCP/IP stack over SPI
  • Universal Feather Compatibility – Works with any Feather board
  • Automatic DHCP – Connects and obtains an IP address within seconds
  • Link & Activity LEDs – Built into the RJ-45 jack for connection status monitoring
  • Standard RJ-45 Jack – Use any standard Ethernet cable
  • Arduino Ethernet2 Library – Cross-platform networking support

Ideal For

  • Permanent installations requiring reliable wired networking
  • Projects where Wi-Fi is unavailable or unreliable
  • Adding Internet connectivity to any Feather-based project

Package Contents

  • 1× Assembled and tested Ethernet FeatherWing
  • 1× Header set (soldering required)
Note: This product does not include Power over Ethernet (PoE) support. PoE can be added using a separate PoE splitter.

Jargon buster

Plain-language definitions for the technical terms used above.

CS
CS stands for chip select, a control pin used by SPI devices to tell which connected device should listen. It matters when you connect more than one SPI module to the same microcontroller, because each device usually needs its own CS pin.
FeatherWing
A FeatherWing is an add-on board made to plug into the Feather microcontroller board layout. Knowing a product is a FeatherWing helps you check whether it will physically and electrically fit your Feather-style mainboard.
PoE
Power over Ethernet lets one Ethernet cable carry both network data and electrical power. This is useful when installing a device where running a separate power adaptor would be difficult.
SPI
A fast serial communication bus often used for displays, memory cards, and sensors. It matters because SPI devices need specific pins for clock and data, plus a separate chip-select line for each device.
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