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XBEE CAPE MANUAL Beagle Bone Black XBee Prototyping Cape CBB-XBEE Revision 1.0 June 3, 2014 www.logicsupply.com [email protected] +1 802 861 2300 1
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XBEE CAPE MANUAL
Beagle Bone Black XBee Prototyping Cape
CBB-XBEE Revision 1.0
June 3, 2014
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XBEE CAPE MANUAL
Description The XBee cape makes it easy to use an XBee or other compatible radio with your BeagleBone or BeagleBone Black
projects. It provides an XBee footprint, general prototyping area, and footprints for 2x LEDs and 2x tactile switches.
Features Female headers for XBee or other compatible radio Dedicated 3.3V linear regulator to provide plenty of current for radio as well as user circuitry Footprints for LEDs connected to XBee Associate and RSSI signals Footprints for 2 vertical or right-angle tactile switches Access to all P8 and P9 header connection points 169 0.1 spaced holes for general prototyping Easy access to 3.3V and 5V power rails Dimensions: 55 x 87 x 13mm (above P8,P9) RoHS compliant
Architecture Signal name Header Pin Pin Mode Comments UART2_TXD P9_21 UART2 TX Serial data out to radio UART2_RXD P9_22 UART2 RX Serial data in from radio
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XBEE CAPE MANUAL
BeagleBone Black Pin Allocation
Requirements for use (not included): BeagleBone Black with suitable distribution loaded 5V DC Power Supply for BeagleBone Black, 2A recommended
Getting Started
1. Solder the supplied 2x23 headers to the outer footprints labeled P8 and P9. The easiest way to make sure
theyre lined up correctly is to plug the headers into a powered off BeagleBone, place the cape on the
headers, then solder it in place
2. Solder the supplied 2mm female headers in the XBee footprint
3. Install the cape and insert your radio module while the BeagleBone is powered off
4. Power up your BeagleBone and youre ready to go!
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XBEE CAPE MANUAL
Key Component Locations
Radio - XBee Compatible Footprint
The pins that are connected are (labeled by XBee pin names):
J1 Name Description
Pin 1 VDD Radio supply, connected to output of the 3.3V regulator
Pin 2 Serial out Connected to UART2 RX by default
Pin 3 Serial in Connected to UART2 TX by default
Pin 5 RESET Active low radio reset, connected to RST via
Pin 6 RSSI XBee signal strength, may be connected through R4 to LED2
Pin 7 DIO11 Connected to P7 via, DIO11 on XBee
Pin 10 GND Connected to BeagleBone GND
Pin 12 CTS Connected to P12 via, CTS or DIO7 on XBee
Pin 15 Assoc. XBee associate indicator, may be connected through R3 to LED1
Pin 16 RTS Connected to P16 via, RTS or DIO6 on XBee
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XBEE CAPE MANUAL
LED1, R3 - XBee Associate Signal or User LED
If R3 and LED1 are both populated, the LED will indicate a connected XBees network association status.
If R3 is not populated, then LED1 may be used as a general purpose LED, in which case you can connect to the anode
by running a wire to the via in the R3 footprint that is closer to the LEDs.
LED2, R4 - XBee RSSI or User LED
If R4 and LED2 are both populated, the brightness of the LED will indicate a connected XBees received signal
strength.
If R4 is not populated, then LED2 may be used as a general purpose LED, in which case you can connect to the anode
by running a wire to the via in the R4 footprint that is closer to the LEDs.
TX, R1 - Radio Serial Output
By default the radios serial output is connected to UART2s RX input. You may optionally connect the radio serial
output to another UART by removing R1 then wiring from the TX via to the desired UARTs RX pin on the P8 or P9
header.
RX, R2 - Radio Serial Input
By default the radios serial input is connected to UART2s TX output. You may optionally connect the radio serial
input to another UART by removing R2 then wiring from the RX via to the desired UARTs TX pin on the P8 or P9
header.
GND, 3.3V, 5V - Power Supply Connections
These pins can be used to power your prototyped circuit. GND is connected directly to the BeagleBones GND, 5V is
connected directly to the 5V supply voltage from the BeagleBones DC barrel jack, and 3.3V is connected to the
ouptut of the capes TLV1117 linear regulator. You can draw up to 500mA from the 3.3V connections.
S1, S2, R5, R6 - Optional Tact Switches
The S1 and S2 footprints may be used to hold either vertical or right-angle tact switches. The two sides of the
switches can be accessed from the nearby vias as labeled on the silkscreen. R5 and R6 may optionally be used as
pull-up or pull-down resistors for the switches, and are routed as shown on the silkscreen.
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XBEE CAPE MANUAL
Programming To communicate with the connected XBee or other compatible radio youll need to first enable UART2. To do this you
can use the BB-UART2-00A0.dtbo Device Tree overlay thats already included with your Kernel. Use the capemgr driver to enable the overlay:
root@beaglebone:~#echoBBUART2>/sys/devices/bone_capemgr.*/slots
You can confirm that the overlay loaded successfully by reading the contents of the slots file:
root@beaglebone:~#cat/sys/devices/bone_capemgr.*/slots0:54:PF1:55:PF2:56:PF3:57:PF4:ff:POLBoneLTeMMC2G,00A0,TexasInstrument,BBBONEEMMC2G5:ff:POLBoneBlackHDMI,00A0,TexasInstrument,BBBONELTHDMI7:ff:POLOverrideBoardName,00A0,OverrideManuf,BBUART2
In this case the BB-UART2 overlay was loaded in slot #7.
You will now have the /dev/ttyO2 serial port file for UART2 which you can use this to communicate with the XBee. For example, using the python-xbee Python library (https://code.google.com/p/python-xbee/) would look like:
fromxbeeimportXBeeimportserialser=serial.Serial('/dev/ttyO2',9600)#UseUART2serialportxbee=XBee(ser)#ContinuouslyreadandprintpacketswhileTrue:try:response=xbee.wait_read_frame()printresponseexceptKeyboardInterrupt:break
ser.close()
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XBEE CAPE MANUAL
Open Source Hardware This product is Open Source Hardware. Design materials, schematics and source code is available on GitHub at
Design materials are NOT SUPPORTED and DO NOT constitute a reference design. THERE IS NO WARRANTY FOR THE
DESIGN MATERIALS, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN
WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE DESIGN MATERIALS AS IS WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY
AND PERFORMANCE OF THE DESIGN MATERIALS IS WITH YOU. SHOULD THE DESIGN MATERIALS PROVE DEFECTIVE,
YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
We mean it, these design materials may be totally unsuitable for any purposes.
License This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported License. To view a copy of
this license, visit http://creativecommons.org/licenses/by-sa/3.0/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.
All derivative works are to be attributed to Logic Supply, Inc.
The BeagleBone, BeagleBone Black and Beagleboard remains the property of beaglebone.org. All references to
BeagleBone, BeagleBone Black, Beagleboard are licensed under a Creative Commons Attribution-Share Alike 3.0
License. All references to CircuitCo remain the property of CircuitCo and are not affiliated to Logic Supply, Inc. in any
way.
Change History
06/03/2014 Version 1.0 Initial Release
More Information For more information, see www.logicsupply.com
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