Arduino Ethernet with PoE module

The Arduino Ethernet is a compact development board with the Wiznet W5100 Ethernet interface built directly onto the board — no separate shield required. Based on the ATmega328 microcontroller, it features 14 digital I/O pins, 6 analogue inputs, a 16 MHz crystal oscillator, RJ-45 connection, power jack, ICSP header, and a reset button.

This version includes a Power over Ethernet (PoE) ready magnetic jack. Because the Ethernet interface is integrated, there's no USB-serial driver on-board — you'll need an FTDI breakout or USB-serial adapter to upload sketches. An on-board micro-SD card slot allows you to store and serve files over the network.

Key Features

• ATmega328 Microcontroller – 32 KB flash (0.5 KB bootloader), 2 KB SRAM, 1 KB EEPROM at 16 MHz
• Wiznet W5100 Ethernet Controller – Built-in TCP/IP stack for wired internet connectivity
• PoE-Ready Magnetic Jack – Standard RJ-45 with Power over Ethernet support
• Micro-SD Card Slot – With active voltage translators (SS on Pin 4)
• 14 Digital I/O Pins – Pins 10–13 reserved for SPI/Ethernet, Pin 4 for SD card, Pin 2 for W5100 interrupt (when bridged)
• 6 Analogue Inputs – For sensor readings and analogue data
• Operating Voltage – 5V; input 7–12V recommended (6–20V limits)
• Current per I/O Pin – 40 mA; 3.3V pin supplies up to 50 mA

Ideal For

• Compact IoT projects where a separate Ethernet shield won't fit
• PoE-powered installations with a single cable for data and power
• Embedded web servers and network-connected data loggers
• Headless network devices and remote monitoring systems

Package Contents

• 1× Arduino Ethernet Board

Resources

• Arduino Ethernet Documentation
• Schematic (PDF)
• EAGLE Design Files