XBP24-BPIT-004 Digi International, XBP24-BPIT-004 Datasheet - Page 29

• Manufacturer Part Number: XBP24-BPIT-004
• Description: Zigbee / 802.15.4 Modules XBee-PRO Znet 2.5 PCB Antenna
• Manufacturer: Digi International

Specifications of XBP24-BPIT-004

• Rohs: yes
• Frequency Band: 2.4 GHz
• Line Of Sight Range: 100 m
• Data Rate: 250 Kbps
• Sensitivity: - 102 dBm
• Operating Supply Voltage: 3 V to 3.4 V
• Output Power: 63 mW
• Antenna Connector Type: PCB
• Maximum Operating Temperature: + 85 C

XBee ZNet 2.5/XBee‐PRO ZNet 2.5 ZigBee OEM RF Modules v1.x4x
5. The AI (Association Indication) parameter will be 0 signifying a successful startup.
6. The MY (16-bit Source address) attribute is 0 (the 16-bit network address of a ZigBee
coordinator).
7. After startup, the coordinator will allow joining based on its NJ (Node Join Time) value.s
4.1.2. Joining an XBee ZNet 2.5 Router or End Device to a PAN
Before a router or an end device can participate in a ZigBee network, it must locate a nearby
coordinator (or another router that has already joined a PAN) and attempt to join to it. The
commands listed in table 4-02 also govern the joining behavior of the router / end device.
If a router or end device has not joined a ZigBee network, it performs a PAN scan on each of the
SC channels, looking for a coordinator or router operating on a valid PAN ID that is allowing joins.
The ID command on the router / end device defines a valid PAN ID. If ID=0xFFFF, any PAN ID is
considered valid. For all other ID values, the router or end device will only join a network
operating on the same PAN ID. The router / end device continues scanning the SC channels until
it discovers a valid device to join.
Once the router / end device discovers a nearby device operating on a valid PAN ID, it sends an
association request frame to that device, and receives an association response, indicating the
router / end device was allowed onto the network. The joining router / end device then sends a
broadcast discovery frame to discover the 64-bit address of the coordinator.
If the router or end device is running API firmware, the API modem status "joined" frame is sent
out the Uart when it successfully joins a PAN. When a router joins, it will then allow routers and
end devices to join to it for a time based on the NJ parameter. The NJ parameter specifies the
router’s permit-joining attribute value. (See section 3.1.4 and the command table for details.)
End devices cannot allow other devices to join a PAN.
If the Associate LED function is enabled (D5 command), the Associate pin (pin 15) is configured in
an output high state if the router / end device has not joined a PAN. Once the router / end device
succeeds in joining a PAN, the Associate pin toggles its output state 2x per second. (The toggle
rate is settable using the LT command. The default behavior (LT=0) for a router / end device is
two blinks per second.)
Once the router / end device has joined on a channel and PAN ID, it will retain the channel and
PAN ID information through power cycle or reset events. See section 4.1.6 for conditions that
cause a router / end device to change its channel and/or PAN ID.
Each router and coordinator can allow up to 8 end device children to join. Once 8 end device
children have joined a particular router or coordinator, that device cannot allow any more end
devices to join to it until its network parameters are reset (see section 4.1.6). The number of end
device children joined to a router or coordinator can be read with the NC command.
Example
1. Set SC and ID to the desired scan channels and PAN ID values. (The default values should
suffice.)
2. If SC or ID is changed from the default, issue the WR command to write the new values.
3. The router, on power-up, will attempt to locate a parent to join according to its SC and ID
parameters.
4. Once the router has joined a parent, the Associate LED, if enabled (D5), will start blinking 2x
per second.
5. The OP and CH parameters will reflect the operating PAN ID and Channel.
6. The MY parameter will reflect the 16-bit network address of the router.
7. If API is enabled (AP parameter > 0): The API Modem Status “Joined” is sent out the UART.
8. If the router is not joining as expected, the AI (Association Indication) parameter can be read to
determine the cause of failure.
9. Once the router has joined a PAN, the router will allow joining based on the NJ parameter.
© 2008 Digi International, Inc.
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