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This repository is looking for a maintainer, let me (@jcw) know if you're interested!

EtherCard is a driver for the ENC28J60 chip, compatible with Arduino IDE. Adapted and extended from code written by Guido Socher and Pascal Stang.

License: GPL2

The documentation for this library is at


  • Hardware: This library only supports the ENC28J60 chip.
  • Hardware: Only AVR-based microcontrollers are supported, such as:
    • Arduino Uno
    • Arduino Mega
    • Arduino Leonardo
    • Arduino Nano/Pro/Fio/Pro-mini/LiliPad/Duemilanove
    • Any other Arduino clone using an AVR microcontroller should work
  • Hardware: Non-AVR boards are NOT currently supported (101/Zero/Due) #211
  • Hardware: Depending on the size of the buffer for packets, this library uses about 1k of Arduino RAM. Large strings and other global variables can easily push the limits of smaller microcontrollers.
  • Hardware: This library uses the SPI interface of the microcontroller, and will require at least one dedicated pin for CS, plus the SO, SI, and SCK pins of the SPI interface.
  • Software: Any Arduino IDE >= 1.0.0 should be fine

Library Installation

  1. Download the ZIP file from
  2. Rename the downloaded file to
  3. From the Arduino IDE: Sketch -> Include Library... -> Add .ZIP Library...
  4. Restart the Arduino IDE to see the new "EtherCard" library with examples

See the comments in the example sketches for details about how to try them out.

Physical Installation

PIN Connections (Using Arduino UNO):

VCC -   3.3V
GND -    GND
SCK - Pin 13
SO  - Pin 12
SI  - Pin 11
CS  - Pin 10 # Selectable with the ether.begin() function

PIN Connections using an Arduino Mega

VCC -   3.3V
GND -    GND
SCK - Pin 52
SO  - Pin 50
SI  - Pin 51
CS  - Pin 53 # Selectable with the ether.begin() function


For questions and help, see the forums (at The issue tracker has been moved back to Github again.

Related Work

There are other Arduino libraries for the ENC28J60 that are worth mentioning:

  • UIPEthernet (Drop in replacement for stock Arduino Ethernet library)
  • EtherSia (IPv6 Arduino library for ENC28J60)
  • EtherShield (no longer maintained, predecessor to Ethercard)
  • ETHER_28J60 (no longer maintained, very low footprint and simple)

Read more about the differences at this blog post.