/ / Introduction

• Low power for long battery life - <50 mA when working hard, <10 uA when sleeping
• 9 input/output lines for analog and digital IO
• Addressing—65,000 network addresses for each of 16 address channels - you can have LOTS of these boards in a network if you want
• Cheap (sort of)
• Wireless
• Easy serial interface
• Small
• Standardized

XBee Modules

Where to find them

• XBee (normal) module - around $19, part # XB24-AWI-001-ND at www.digikey.com
• XBee Pro module - around $32, part # XBP24-AWI-001-ND at www.digikey.com

AT commands

AT->OK
ATMY ->my address
ATDH.ATDL ->destination address hi/of-destination of 
ATID->personal area network ID
ATCN->end command mode
ATD0..D8->set pins
	ATDX0-disabled
	ATDX1-undefied
	ATDX2-analog input
	ATDX3-digital input
	ATDX4-digital output low
	ATDX5-digital output high
ATIR->sets sample rate in milliseconds -sampling local pin (10times per second) 0x14
ATIT->how many samples to collect
ATP0-P1->PWM configuration
	ATPX
ATIU->1/o input enable (UART)
ATAI->I/O input address-what address do I want to pay attention to?
	who do I want to be paired with
	

/ /Lilypad

• XBee 802.15.4 OEM Module, Chip Antenna (30-100 m range)
• LilyPad XBee
• Alligator clips
• 9 Volt battery or 3.3 - 3.7 Volt battery
• FTDI cable for programming with angle headers

SETUP

1. With female headers: This is how the board ships, and is a great setup for prototyping. You can easily swap out your radios to work with different models and antenna types.
   
   
   
2. Soldered directly to the board: This is for projects that are more in their final stages, where you know you won't be swapping your radios. This secures the radio to the board and reduces the profile of your board. With the current version of the board, you’ll need to desolder and remove the female headers first.
   

PIN LIST

POWER SOURCES

• Lithium Ion coin cells connected to the 3.3V and — pins (#2450 or larger recommended)
  
• Lithium Ion battery packs connected to the 3.3V and — pins
  
• 9V battery
  

COMMON QUESTIONS ABOUT THE BOARD

What is a solder jumper?

Solder jumpers are a blob of solder that connects two pads together, completing a circuit. They form a semi-permanent connection, but can be removed with a soldering iron and solder wick. Later, you can re-make the connection. This cycle can be performed repeatedly, though eventually it will weaken the board. There are two solder jumpers on the LilyPad XBee board. One is by the d1 pad that completes a circuit for the LED lights and another by the VRef pad that routes the supply current to the Voltage reference pin.

Why do lights have solder jumpers?

Sometimes you don’t want blinking lights on your board. Removing the upper solder jumper, by the d1 pin will disable both the ON and RSSI LED light.

Why does VRef pin have a solder jumper?

The Voltage reference pin tells the XBee what Voltage to set as the maximum level when reading an analog sensor. In most cases this will be the same as the XBee’ supply voltage so the jumper can be left in place. However, if you are using a different voltage for an analog sensor, then this jumper can be removed and that different voltage can be routed to the VRef pin.

Keep in Mind

Wireless Wearable Project

Parts you will be working with:

//Espionage Gloves

Here's an example that uses xBee without Arduino:
Glove A:

ATRE,ID3456,MY1,DL2,IR64,IT1,D63,D45,IA2,WR

Glove B:

ATRE,ID3456,MY2,DL1,IR64,IT1,D65,D43,IA1,WR

In the above lines ATMY is this xBee

ATDL is the xBee to be communicated with-the Destination Address

ATIR command is used to set/read the sample rate. When set, the module will sample all enabled DIO/ADC lines at a specified interval. This command allows periodic reads of the ADC and DIO lines in a non-Sleep Mode setup. Example: When IR = 0x0A, the sample rate is 10 ms (or 100 Hz).

ATIT and ADC samples to collect before transmitting data. One ADC sample is considered complete when all enabled ADC channels have been read. The module can buffer up to 93 Bytes of sample data. Since the module uses a 10-bit A/D converter, each sample uses two Bytes. This leads to a maximum buffer size of 46 samples or IT=0x2E.

When Sleep Modes are enabled and IR (Sample Rate) is set, the module will remain awake until IT samples have been collected.

ATD7 command is used to select/read the behavior of the DIO7 line (pin 12). Options include:

• CTS flow control
• Analog-to-digital converter
• Digital input
• Digital output

Parameter	Configuration
0	Disabled
1	CTS Flow Control
2	n/a
3	DI
4	DO low
5	DO high

D0 - D4 (DIOn Configuration) Commands The D0, D1, D2, D3 and D4 commands are used to select/read the behavior of their respective AD/DIO lines (pins 20, 19, 18, 17 and 11 respectively). Options include:

• Analog-to-digital converter
• Digital input
• Digital output

Parameter	Configuration
0	Disabled
1	n/a
2	ADC
3	DI
4	DO low
5	DO high

The ATIA command is used to bind a module output to a specific address. Outputs will only change if received from this address. The IA command can be used to set/read both 16 and 64-bit addresses. Setting all bytes to 0xFF will not allow the reception of any I/O packet to change outputs. Setting the IA address to 0xFFFF will cause the module to accept all I/O packets.

The ATWR command is used to write configurable parameters to the RF module's nonvolatile memory. Parameter values remain in the module's memory until overwritten by subsequent use of the WR Command.

If changes are made without writing them to non-volatile memory, the module reverts back to previously saved parameters the next time the module is powered-on.

Analog inputs activated

ATD0 2

ATD1 2

ATD2 2

Sample rate 80 milliseconds: ATIR 50

1 sample per transmission: ATIT 1