Arduino Wireless SD Shield

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Wireless SD Shield Front

Wireless SD Shield Back

简介
无线SD扩展板允许Arduino电路板通过无线模式进行无线通信。此扩展板是基于Digi Xbee模式，但是它可利用相同的引脚使用任何模式。该模块可以在室内100 英尺或室外300 英尺（直视）通信。它可以用作串行/usb 更换或者你可以把它设置到命令模式配置它的各种播放和网状网络选项。此扩展板允许每个 Xbee 引脚通孔焊垫。



Included on board is a SD card slot. When using the SD Library to access the card, Pin 4 is CS and cannot be used otherwise. SPI also relies on pins 11, 12, and 13 for communication.

An on-board switch allows the wireless module to communicate with the USB-to-serial converter or with the microntroller.

开关配置
The Wireless SD shield has an on-board switch labelled Serial Select. It determines how the Xbee's serial communication connects to the serial communication between the microcontroller (ATmega8 or ATmega168) and USB-to-serial chip on the Arduino board.

When in the Micro position, the DOUT pin of the wireless module is connected to the RX pin of the microcontroller; and DIN is connected to TX. The wireless module will then communicate with the microcontroller. Note that the RX and TX pins of the microcontroller are still connected to the TX and RX pins (respectively) of the USB-to-serial converter. Data sent from the microcontroller will be transmitted to the computer via USB as well as being sent wirelessly by the wireless module. The microcontroller will not be programmable via USB in this mode.

With the switch in the USB position, the DOUT pin the wireless module is connected to the RX pin of the USB-to-serial converter, and DIN on the wireless module is connected to the TX pin of the USB-to-serial converter. This means that the module can communicate directly with the computer. The microcontroller on the board will be bypassed. To use the shield in this mode, you must program the microcontroller with an empty sketch (shown below), or remove it from the board.

网络
The Wireless SD shield can be used with different modules with the same footprint as the XBee modules. The instructions below are for the XBee 802.15.4 modules (sometimes called "Series 1" to distinguish them from the Series 2 modules, although "Series 1" doesn't appear in the official name or product description) and also for the XBee ZNet 2.5 or XBee ZB modules, both known as "Series 2" modules. All the modules, basically have the same type of configuration parameters, but differ by the function that they implement and the topologies of networks that they can create. Can communicate with each other only modules of the same family.

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