Ardiuno Ethernet Shield with PoE board with coin
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Ardiuno Ethernet Shield with PoE

$90.00

You may know that the Arduino Ethernet Shield with PoE allows an Arduino board to connect to the internet, and if you don’t we’re here to tell you, it does… Aren’t we nice? So anyway, it’s based on the Wiznet W5100 ethernet chip providing a network (IP) stack capable of both TCP and UDP. The Arduino Ethernet Shield supports up to four simultaneous socket connections. Use the Ethernet library to write sketches which connect to the internet via a standard RJ45 Ethernet jack using the shield. Another neat tidbit of info is that the Ethernet jack can also be used for power. Power over Ethernet, or PoE for short, is a system that’s designed to pass data and power, safely, over the same Cat5 cable.

2 in stock

Product Description

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Ardiuno Ethernet Shield with PoE

Technical Specifications of Ardiuno Ethernet Shield with PoE

Microcontroller: ATmega328
Operating Voltage: 5V
Input Voltage Plug (recommended): 7-12V
Input Voltage Plug (limits): 6-20V
Input Voltage PoE (limits): 36-57V
Digital I/O Pins: 14 (of which 4 provide PWM output)
Arduino Pins reserved: 10 to 13 used for SPI, 4 used for SD card, 2 W5100 interrupt (when bridged)
Analog Input Pins: 6
DC Current per I/O Pin: 40 mA
DC Current for 3.3V Pin: 50 mA
Flash Memory: 32 KB (ATmega328) of which 0.5 KB used by bootloader
SRAM: 2 KB (ATmega328
EEPROM: 1 KB (ATmega328)
Clock Speed: 16 MHz
W5100 TCP/IP Embedded Ethernet Controller
Power Over Ethernet ready Magnetic Jack
Micro SD card, with active voltage translators

The board can also be powered via an external power supply, an optional Power over Ethernet (PoE) module, or by using a FTDI cable/USB Serial connector.

External power can come either from an AC-to-DC adapter (wall-wart) or battery. The adapter 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 6 to 20 volts. If supplied with less than 7V, however, the 5V pin may supply less than five volts and the board may be unstable. If using more than 12V, the voltage regulator may overheat and damage the board. The recommended range is 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 optional PoE module is designed to extract power from a conventional twisted pair Category 5 Ethernet cable:
IEEE802.3af compliant
Low output ripple and noise (100mVpp)
Input voltage range 36V to 57V
Overload and short-circuit protection
9V Output
High efficiency DC/DC converter: typ 75% @ 50% load
1500V isolation (input to output)

Memory
The ATmega328 has 32 KB (with 0.5 KB used for the bootloader). It also has 2 KB of SRAM and 1 KB of EEPROM (which can be read and written with the EEPROM library).

Input and Output
Each of the 14 digital pins on the Ethernet board can be used as an input or output, using pinMode(), digitalWrite(), anddigitalRead() functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, some pins have specialized functions:
Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data.
External Interrupts: 2 and 3. These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt() function for details.
PWM: 3, 5, 6, 9, and 10. Provide 8-bit PWM output with the analogWrite() function.
SPI: 10 (SS), 11 (MOSI), 12 (MISO), 13 (SCK). These pins support SPI communication using the SPI library.
LED: 9. There is a built-in LED connected to digital pin 9. When the pin is HIGH value, the LED is on, when the pin is LOW, it’s off. On most other arduino boards, this LED is found on pin 13. It is on pin 9 on the Ethernet board because pin 13 is used as part of the SPI connection.
The Ethernet board has 6 analog inputs, labeled A0 through A5, each of which provide 10 bits of resolution (i.e. 1024 different values). By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the AREF pin and the analogReference() function. Additionally, some pins have specialized functionality:
TWI: A4 (SDA) and A5 (SCL). Support TWI communication using the Wire library.
There are a couple of other pins on the board:
AREF. Reference voltage for the analog inputs. Used with analogReference().
Reset. Bring this line LOW to reset the microcontroller. Typically used to add a reset button to shields which block the one on the board.
See also the mapping between Arduino pins and ATmega328 ports.

Communication
The Arduino Ethernet has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers.
A SoftwareSerial library allows for serial communication on any of the Uno’s digital pins.
The ATmega328 also supports TWI and SPI communication. The Arduino software includes a Wire library to simplify use of the TWI bus; see the documentation for details. For SPI communication, use the SPI library.
The board also can connect to a wired network via ethernet. When connecting to a network, you will need to provide an IP address and a MAC address. The Ethernet Library is fully supported.
The onboard microSD card reader is accessible through the SD Library. When working with this library, SS is on Pin 4.

How to use Ardiuno Ethernet Shield with PoE

Programming
It is possible to program the Arduino Ethernet board in two ways: through the 6 pin serial programming header, or with an external ISP programmer.

The 6-pin serial programming header is compatible with FTDI USB cables FTDI-style basic USB-to-serial breakout boards including the Arduino USB-Serial connector. It features support for automatic reset, allowing sketches to be uploaded without pressing the reset button on the board. When plugged into a FTDI-style USB adapter, the Arduino Ethernet is powered off the adapter.

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

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

Physical Characteristics
The maximum length and width of the Ethernet PCB are 2.7 and 2.1 inches respectively, with the RJ45 connector and power jack extending beyond the former dimension. Four screw holes allow the board to be attached to a surface or case. Note that the distance between digital pins 7 and 8 is 160 mil (0.16″), not an even multiple of the 100 mil spacing of the other pins.

Setup
If you want to use a FTDI cable to download your sketches on the Arduino Ethernet, please refer to this guide: Upgrade the Arduino Ethernet bootloader to the latest version

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