jirasak raksachum prince of songkla university. xbee ? specifications of the xbee®/xbee ‐ pro®...
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TESA TOP GUN RALLY 2011
XBEE
Jirasak Raksachum
Prince of Songkla University
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OVERVIEW
XBee ? Specifications of the XBee®/XBee‐
PRO® Pin Signals Serial Communications ZigBee & Network API Operation
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XBEE ?
operate within the ZigBee protocol and support the unique needs of low-cost, low-power wireless sensor networks.
The modules require minimal power and provide reliable delivery of data between remote devices.
The modules operate within the ISM 2.4 GHz frequency band
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SPECIFICATIONS OF THE XBEE®/XBEE‐PRO®
Specification XBee XBee-PRO (S2) XBee-PRO (S2B)
Performance
Indoor/Urban Range
up to 133 ft. (40 m)
Up to 300 ft. (90 m), up to 200 ft (60 m) international variant
Up to 300 ft. (90 m), up to 200 ft (60 m) international variant
Outdoor RF line-of-sight Range
up to 400 ft. (120 m)
Up to 2 miles (3200 m), up to 5000 ft (1500 m) international variant
Up to 2 miles (3200 m), up to 5000 ft (1500 m) international variant
Transmit Power Output
2mW (+3dBm), boost mode enabled 1.25mW (+1dBm), boost mode disabled
50mW (+17 dBm) 10mW (+10 dBm) for International variant
63mW (+18 dBm) 10mW (+10 dBm) for International variant
RF Data Rate 250,000 bps 250,000 bps 250,000 bps
Data Throughput up to 35000 bps up to 35000 bps up to 35000 bps
Serial Interface Data Rate (software selectable)
1200 bps - 1 Mbps (non-standard baud rates also supported)
1200 bps - 1 Mbps (non-standard baud rates also supported)
1200 bps - 1 Mbps (non-standard baud rates also supported)
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Specification XBee XBee-PRO (S2) XBee-PRO (S2B)
Power Requirements
Supply Voltage 2.1 - 3.6 V 3.0 - 3.4 V 2.7 - 3.6 V
Operating Current (Transmit, max output power)
40mA (@ 3.3 V, boost mode enabled) 35mA (@ 3.3 V, boost mode disabled)
295mA (@3.3 V) 170mA (@3.3 V) international variant
205mA, up to 220 mA with programmable variant (@3.3 V) 117mA, up to 132 mA with programmable variant (@3.3 V), International variant
Operating Current (Receive))
40mA (@ 3.3 V, boost mode enabled) 38mA (@ 3.3 V, boost mode disabled)
45 mA (@3.3 V) 47 mA, up to 62 mA with programmable variant (@3.3 V)
SPECIFICATIONS OF THE XBEE®/XBEE‐PRO®
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Specification XBee XBee-PRO (S2) XBee-PRO (S2B)
General
Operating Frequency Band
ISM 2.4 GHz ISM 2.4 GHz ISM 2.4 GHz
Operating Temperature
-40 to 85º C (industrial)
-40 to 85º C (industrial)
-40 to 85º C (industrial)
Networking
Number of Channels
16 Direct Sequence Channels
14 Direct Sequence Channels
15 Direct Sequence Channels
Channels 11 to 26 11 to 24 11 to 25
SPECIFICATIONS OF THE XBEE®/XBEE‐PRO®
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PIN SIGNALS
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PIN SIGNALS Pin # Name Direction Default
State Description
1 VCC - - Power supply
2 DOUT Output Output UART Data Out
3 DIN / CONFIG Input Input UART Data In
4 DIO12 Both Disabled Digital I/O 12
5 RESET Both Open-Collector with pull-up
Module Reset (reset pulse must be at least 200 ns)
6 RSSI PWM / DIO10
Both Output RX Signal Strength Indicator / Digital IO
7 DIO11 Both Input Digital I/O 11
8 [reserved] - Disabled Do not connect
9 DTR / SLEEP_RQ/ DIO8
Both Input Pin Sleep Control Line or Digital IO 8
10 GND - - Ground
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PIN SIGNALS
Pin #
Name Direction
Default State
Description
11 DIO4 Both Disabled Digital I/O 4
12 CTS / DIO7 Both Output Clear-to-Send Flow Control or Digital I/O 7. CTS, if enabled, is an output
13 ON / SLEEP Output Output Module Status Indicator or Digital I/O 9
14 VREF Input - Not used for EM250.
15 Associate / DIO5
Both Output Associated Indicator, Digital I/O 5
16 RTS / DIO6 Both Input Request-to-Send Flow Control, Digital I/O 6. RTS, if enabled, is an input.
17 AD3 / DIO3 Both Disabled Analog Input 3 or Digital I/O 3
18 AD2 / DIO2 Both Disabled Analog Input 2 or Digital I/O 2
19 AD1 / DIO1 Both Disabled Analog Input 1 or Digital I/O 1
20 AD0 / DIO0 / Commissioning Button
Both Disabled Analog Input 0, Digital IO 0, or Commissioning Button
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SERIAL COMMUNICATIONS
Devices that have a UART interface can connect directly to the pins of the RF module as shown
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SERIAL INTERFACE PROTOCOLS
The XBee modules support both transparent and API (Application Programming Interface) serial interfaces.
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AS A GENERAL RULE OF THUMB, API FIRMWARE IS RECOMMENDED WHEN DEVICE: sends RF data to multiple destinations sends remote configuration commands to manage devices
in the network receives IO samples from remote devices receives RF data packets from multiple devices, and the
application needs to know which device sent which packet must support multiple ZigBee endpoints, cluster IDs,
and/or profile IDs uses the ZigBee Device Profile services. If the above conditions do not apply (e.g. a sensor node,
router, or a simple application), then AT firmware might be suitable. It is acceptable to use a mixture of devices running API and AT firmware in a network.
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ZIGBEE STACK LAYERS
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DEVICE TYPES : COORDINATOR
Selects a channel and PAN ID (both 64-bit and 16-bit) to start
Can allow routers and end devices to join the network
Can assist in routing data Cannot sleep--should be mains powered Can buffer RF data packets for sleeping
end device children.
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DEVICE TYPES : ROUTER
Must join a ZigBee PAN before it can transmit, receive, or route data
After joining, can allow routers and end devices to join the network
After joining, can assist in routing data Cannot sleep--should be mains powered. Can buffer RF data packets for sleeping
end device children.
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DEVICE TYPES : END DEVICE
Must join a ZigBee PAN before it can transmit or receive data
Cannot allow devices to join the network Must always transmit and receive RF data
through its parent. Cannot route data. Can enter low power modes to conserve
power and can be battery-powered.
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AN EXAMPLE OF SUCH A NETWORK
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PAN ID
ZigBee networks are called personal area networks or PANs.
Each network is defined with a unique PAN identifier (PAN ID).
This identifier is common among all devices of the same network.
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OPERATING CHANNEL
ZigBee utilizes direct-sequence spread spectrum modulation and operates on a fixed channel.
The 802.15.4 PHY defines 16 operating channels in the 2.4 GHz frequency band.
XBee modules support all 16 channels and XBee- PRO modules support 14 of the 16 channels.
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ADDRESSING
64-bit Device (extended) address Coordinator : 0x0000000000000000 Broadcast : 0x000000000000FFFF Unicast : 0x0013A200XXXXXXXX
16-bit Device (network) address Coordinator : 0x0000 0xFFFE if address is unknown
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API OPERATION
the UART data frame structure is defined as follows:
The length field has a two-byte value that specifies the number of bytes that will be contained in the frame data field. It does not include the checksum field.
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FRAME DATA
Frame data of the UART data frame forms an API-specific structure as follows:
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API FRAME NAMES AND VALUES
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CHECKSUM
To calculate: Not including frame delimiters and length, add all bytes keeping only the lowest 8 bits of the result and subtract the result from 0xFF.
To verify: Add all bytes (include checksum, but not the delimiter and length). If the checksum is correct, the sum will equal 0xFF.
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API EXAMPLES : ZIGBEE TRANSMIT REQUEST
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API EXAMPLES : ZIGBEE TRANSMIT REQUEST
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End