Features

• – 3-pin & 4-pin sensor interfaces, supports connecting sensors directly without complicate custom connections
• – XBee module connector
• – WIFI-LPT100 wireless module connector

What’s on Board

1. XBee module connector
2. IIC interface
3. SPI interface
4. 3-pin sensor interface
   
   • – VCC : power positive
   • – GND : ground
   • – D : digital pin, correspond to the Arduino board
5. WIFI-LPT100 connector
6. 4-pin sensor interface
   
   • – VCC : power positive
   • – GND : ground
   • – A : analog pin, correspond to the Arduino board
   • – D : digital pin, correspond to the Arduino board
7. VCC configuration : for selecting sensor interfaces power voltage
8. Debugging/Communication selection jumper
   
   • – when connecting TXD and TX, RXD and RX respectively, the Arduino board may debug/config the XBee module or WIFI-LPT100 through serial port
   • – when connecting TXD and RX, RXD and TX respectively, the Arduino board may communicate with the XBee module or WIFI-LPT100 through serial port
9. Power indicator
10. WIFI-LPT100 state indicator
11. XBee module state indicator
12. WIFI-LPT100 RELOAD button : for restoring to factory setting
13. XBee module and WIFI-LPT100 RESET button
14. XBee module EASYLINK button

Development resources: demo codes, schematic, datasheets, etc.
www.waveshare.com/IO_Expansion_Shield

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