Arduino UNO Ethernet without PoE R3

Arduino UNO Ethernet without PoE R3

Arduino UNO Ethernet without PoE R3


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The map based on the UNO ATmega328 microcontroller integrates an Ethernet shield

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Model order and remplce by the model Arduino ETH Leonardo


Arduino Ethernet is a Board based on the ATmega328 microcontroller. 

It has 14 entrances / digital outputs, 6 entries analog of an oscillator to Crystal 16 MHz, a power outlet, a connector CPSI, RJ45 connection, and a reset button.

NB: The pins 10, 11, 12 and 13 are reserved for interfacing with the Ethernet module and may not be used otherwise.

This reduces the number of pins available to 9, with 4 outputs available PWM.

A power supply via Ethernet is possible thanks to the PoE module in option that can be added to the map.

The Arduino Ethernet differs from other Arduino UNO cards because she lacks a USB-serial chip, to make room for the interface Ethernet Breadboard. It's the m ^ even found on the Ethernet shield.

MicroSD card support is also present, it can be used to store files to be used for the network is accessible by the SD library. 

Pin 10 is reserved for the Breadboard interface, the SS of the SD card is on pin 4.

A six-pin connector allows connected FTDI USB/serial cable or a module USB2SERIAL necessary for programming (not provided).


This Arduino Ethernet card is without the the PoE module allowing a power supply via the RJ45 network jack.


  • Micro-controller: ATmega328
  • Nominal supply voltage: 5V
  • Power supply (recommended): 7 - 12V
  • Supply voltage (limits): 6 - 20V
  • Input/output digital: 14 (of which 6 can be used as outputs PWN)
  • Analog inputs: 6
  • DC Current per I/O Pin: 40 my
  • DC Current for 3.3V Pin: 50 my
  • Flash memory: 32 KB (ATmega328) including 0.5 KB used by bootloader
  • SRAM: 2 KB (ATmega328)
  • EEPROM: 2 KB (ATmega328)
  • Clock speed: 16 MHz
  • Official Arduino made in Italy


Documentation Arduino:

Arduino in French documentation:

Arduino Ethernet documentation:

Download the Arduino software

Datasheet of the ATMEL ATmega328

 You can find the Ethernet development library on Ethernet Librairy and the development SD library on SD Librairy 

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