Arduino connector : for connecting Arduino shields
ICSP interface : Arduino ICSP
XBee connector : for connecting XBee communication modules
Sensor interface : for connecting sensors
Raspberry Pi connector : for connecting Raspberry Pi
USB TO UART
TLC1543 : AD converter
PCF8563 : RTC
CP2102
32.768KHz crystal : for RTC
Power indicator
XBee state LED
XBee and Arduino interface RESET button
XBee EASYLINK button
RTC battery holder : for CR1220 button battery
TLC1543 reference voltage configuration jumper
RTC jumper
16UART jumper when connecting P_RX and CP_TX, P_TX and CP_RX respectively, USB TO UART is connected to Raspberry Pi serial port when connecting XB_RX and CP_TX, XB_TX and CP_RX respectively, USB TO UART is connected to XBee serial port when connecting XB_RX and P_TX, XB_TX and P_RX respectively, Raspberry Pi serial port is connected to XBee serial port
Arduino AD selection jumper short 2 and 3 : Arduino A0-A5 as AD input short 1 and 2 : Arduino A0-A5 as digital control
Arduino I2C selection jumper short the jumper : Arduino A4-A5 as I2C control (the A4-A5 of Arduino AD selection jumper should be opened)
Arduino SPI selection jumper short 1 and 2 : Arduino D11-D13 as SPI control (default) short 2 and 3 : Arduino D11-D13 as digital control