A24-HASM-450 Digi International/Maxstream, A24-HASM-450 Datasheet - Page 22

• Manufacturer Part Number: A24-HASM-450
• Description: ANT 2.4GHZ DIPOLE HALF-WAVE
• Manufacturer: Digi International/Maxstream
• Series: XPressr

Specifications of A24-HASM-450

• Antenna Type: Whip: 1/2 Wave, Swivel, Tilt (Right Angle)
• Number Of Bands: 1
• Frequency: 2.4GHz
• Vswr: 2
• Gain: 2.1dBi
• Termination: RP-SMA
• Mounting Type: Connector
• Height (max): 4.35" (110.5mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 70000340; Q2724499B

XBee/XBee‐PRO ZigBee OEM RF Modules v1.x1x [2007.06.01]
4.2. XBee Series 2 Addressing
4.2.1. Device Addressing
64-Bit Addressing
API Addressing
XBee modules support both ZigBee device addressing and application-layer addressing.
All XBee/XBee-Pro modules can be identified by their unique 64-bit adresses or a user-
configurable ASCII string identifier The 64-bit address of a module can read using the SH and SL
commands. The ASCII string identifier is configured using the NI command. To transmit using
device addressing, only the destination address must be configured. The destination address can
be specified using either the destination device’s 64-bit address or its NI-string. The XBee modules
also support coordinator and broadcast addressing modes. Device addressing in the AT firmware is
configured using the DL, DH, or DN commands. In the API firmware, the ZigBee Transmit Request
API frame (0x10) can be used to specify destination addresses.
To address a node by its 64-bit address, the destination 64-bit address must be set to match the
64-bit address of the remote. In the AT firmware, the DH and DL commands set the destination
64-bit address. In the API firmware, the destination 64-bit address is set in the ZigBee Transmit
Request frame. The coordinator can be addressed by either setting the destination address to 0 or
by setting it to match the coordinator's 64-bit address. Broadcast transmissions can be sent by
setting the 64-bit address to 0x000000000000FFFF.
To send a packet to an RF module using its 64-bit Address (Transparent Mode)
To send a packet to an RF module using its 64-bit Address (API Mode)
Since the ZigBee protocol relies on the 16-bit Network Address for routing, the 64-bit address
must be converted into a 16-bit Network Address prior to transmitting data. If a module does not
know the 16-bit Network Address for a given 64-bit address, it will transmit a broadcast Network
Address Discovery command. The module with a matching 64-bit address will transmit its 16-bit
network address back. Once the network address is discovered, the data will be transmitted.
The modules maintain a table that can store up to seven 64-bit addresses and their corresponding
16-bit Network Addresses.
API Mode provides the ability to store and maintain 16-bit Network Address tables on an external
processor. The 16-bit Network Address information is provided to the application through the
following:
With this information, a table can be built in an application that maps a 64-bit Address to the
corresponding 16-bit Network Address.
The ZigBee Transmit Request API frame specifies the 64-bit Address and the Network Address (if
known) that the packet should be sent to. By supplying both addresses, the module will forego
Network Address Discovery and immediately attempt to route the data packet to the remote. If
the Network Address of a particular remote changes, Network Address and route discovery will
Set the DH (Destination Address High) and DL (Destination Address Low) parameters of the
source node to match the 64-bit Address (SH (Serial Number High) and SL (Serial Number
Low) parameters) of the destination node.
Use the ZigBee Transmit Request API frame to set the DH (Destination Address High) and DL
(Destination Address Low) parameters of the source node to match the 64-bit Address (SH
(Serial Number High) and SL (Serial Number Low) parameters) of the destination node.
If the 16-bit address of the destination node is not known, set 16-bit Destination Network
Address to 0xFFFE (refer to the ‘API Addressing section below).
© 2007 Digi International, Inc.
• The ZigBee Transmit Status Frame
• The ND and DN commands
(contains the current 16-bit Network Address of the remote)
(return 64-bit and 16-bit Network Addresses of remote nodes)
Chapter 4 ‐ RF Module Configuration
22