Arduino Leonardo Ethernet

Arduino Arduino Leonardo Ethernet
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Price: £38.40
(£32.00 + VAT)
Availability: 3
Model: LEONARDO-ETH
Manufacturer: Arduino
Average Rating: Not Rated

Arduino

Arduino Leonardo Ethernet (without POE)

The Leonardo ETH is a microcontroller board based on the ATmega32U4 and the new W5500 TCP/IP Embedded Ethernet Controller. It has 20 digital input/output pins (of which 7 can be used as PWM outputs and 12 as analog inputs), a 16 MHz crystal oscillator, a RJ45 connection, a micro USB connector, a power jack, an ICSP header, and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started.

The Leonardo ETH differs from the preceding Ethernet board in that the ATmega32u4 has built-in USB communication, eliminating the need for an external USB-to-serial converter. This allows the Leonardo ETH to appear to a connected computer as a mouse and keyboard, in addition to a virtual (CDC) serial / COM port.

The Leonardo ETH has the same Wiznet Ethernet interface as the Ethernet Shield 2.
An onboard microSD card reader, which can be used to store files for serving over the network, is accessible through the SD Library. Pin 10 is reserved for the Wiznet interface, SS for the SD card is on Pin 4.
The board uses the standardized 1.0 pinout, consisting of:

added SDA and SCL pins: beside the AREF pin, two TWI pins have been added. This will allow to connect the Leonardo ETH to Shields that use the I2C or TWI bus communication for their functioning.

the IOREF: it allows the shields to adapt to the IO voltage level provided by the Board. The Shield that uses the IOREF pin will be compatible with both 3V3 and 5V (e.g Due and Uno) IO levels Arduino Boards. Next to the IOREF pin you can find another (currently not in use) pin, that is reserved for future usage. 

Features

Microcontroller ATmega32u4
Operating Voltage 5V
Input Voltage Plug (recommended) 7-12V
Digital I/O Pins 20
PWM Channels 7
Arduino Pins reserved: 4 used for microSD card
  1 used for W5500 select
Analog Input Pins 12
DC Current per I/O Pin 40 mA
DC Current for 3.3V Pin 1 A (only when powered via the external power supply)
Flash Memory 32 KB (ATmega32u4) of which 4 KB used by bootloader
SRAM 2.5 KB (ATmega32u4
EEPROM 1 KB (ATmega32u4)
Clock Speed 16 MHz
W5500 TCP/IP Embedded Ethernet Controller  
Micro SD card, with active voltage translators


The board can be powered via an external power supply or using the micro USB connection. 
External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or battery. When using the power adapter, it can be connected by plugging a 2.1mm center-positive plug into the board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of the POWER connector.
The board can operate on an external supply of 7 to 12 volts.
The power pins are as follows:

  • VIN. The input voltage to the Arduino board when it's using an external power source (as opposed to 5 volts from the USB connection or other regulated power source). You can supply voltage through this pin, or, if supplying voltage via the power jack, access it through this pin.
  • 5V. This pin outputs a regulated 5V from the regulator on the board. The board can be supplied with power either from the DC power jack (7 - 12V), the USB connector (5V), or the VIN pin of the board (7-12V). Supplying voltage via the 5V or 3.3V pins bypasses the regulator, and can damage your board. We don't advise it.
  • 3V3. A 3.3 volt supply generated by the on-board regulator. Maximum current draw is 50 mA.
  • GND. Ground pins.
  • IOREF. This pin on the Arduino board provides the voltage reference with which the microcontroller operates. A properly configured shield can read the IOREF pin voltage and select the appropriate power source or enable voltage translators on the outputs for working with the 5V or 3.3V.

The Leonardo ETH can be programmed with the Arduino software. Select "Arduino Leonardo" from the Tools > Board menu.

The ATmega32U4 on the Arduino Leonardo ETH comes pre-burned with a bootloader that allows you to upload new code to it without the use of an external hardware programmer.

 

You can also bypass the bootloader and program the microcontroller through the ICSP (In-Circuit Serial Programming) header using Arduino ISP or similar. 

 

All the Leonardo ETH example sketches work as they do with the Ethernet shield 2. Make sure to change the network settings for your network.

 

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Arduino Leonardo Ethernet
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Arduino Leonardo Ethernet
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