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Arduino Wi-Fi Shield
La nueva placa oficial Arduino Wifi Shield está realizada especialmente para que sea lo mas hackeable posible, y con librerías que pretenden hacer sencillo el paso de nuestros códigos para la ethernet shield a esta nueva placa. Dispone de un zócalo para tarjetas de memoria microSD así como un conector própio mini USB para utilizarla sin necesidad de conectarla a una placa Arduino.
Características:
- Necesita una placa Arduino UNO (no incluida)
- Alimentación: 5V (proporcionado por la placa Arduino)
- Red: 802.11b/g
- Encriptaciones soportadas: WEP y WPA2
- Conexión con Arduino por el puerto SPI
- Zócalo para tarjeta Micro SD incorporado
- Pines ICSP
- Conexión FTDI para debug
- Conexión Mini-USB para actualizaciones de Firmware
Documentación:
Arduino Wi-Fi Shield
DEV-11287
Description: The Arduino WiFi Shield allows an Arduino board to connect to the internet using the 802.11 wireless specification (WiFi). It is based on the
HDG104 Wireless LAN 802.11b/g System in-Package. An Atmega 32UC3 provides a network (IP) stack capable of both TCP and UDP. Use the
WiFI library to write sketches which connect to the internet using the shield. The WiFI shield connects to an Arduino board using long wire-wrap headers which extend through the shield. This keeps the pin layout intact and allows another shield to be stacked on top.
There is an onboard micro-SD card slot, which can be used to store files for serving over the network. It is compatible with the Arduino Uno and Mega. The onboard microSD card reader is accessible through the SD Library. When working with this library, SS is on Pin 4.
Arduino communicates with both the Wifi shield's processor and SD card using the SPI bus (through the ICSP header). This is on digital pins 11, 12, and 13 on the Uno and pins 50, 51, and 52 on the Mega. On both boards, pin 10 is used to select the HDG104 and pin 4 for the SD card. These pins cannot be used for general I/O. On the Mega, the hardware SS pin, 53, is not used to select either the HDG104 or the SD card, but it must be kept as an output or the SPI interface won't work.
Digital pin 7 is used as a handshake pin between the WiFi shield and the Arduino, and should not be used.
Note that because the HDG104 and SD card share the SPI bus, only one can be active at a time. If you are using both peripherals in your program, this should be taken care of by the corresponding libraries. If you're not using one of the peripherals in your program, however, you'll need to explicitly deselect it. To do this with the SD card, set pin 4 as an output and write a high to it. For the HDG104, set digital pin 10 as a high output.
Features:
- Connection via: 802.11b/g networks
- Encryption types: WEP and WPA2 Personal
- on-board micro SD slot
- FTDI-style connection for serial debugging of WiFi shield
- Micro-USB for updating the WiFi shield firmware
- open source firmware making it possible to add new protocols directly on the shield.
- If you are familiar with C and the AVR32 family you can even use this shield as a standalone wifi connected microcontroller.
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