XB24-BUIT-004 Digi International/Maxstream, XB24-BUIT-004 Datasheet - Page 38

• Manufacturer Part Number: XB24-BUIT-004
• Description: MODULE 802.15.4 SER 2 U.FL CONN
• Manufacturer: Digi International/Maxstream
• Series: XBee™r

Specifications of XB24-BUIT-004

• Frequency: 2.4GHz
• Data Rate - Maximum: 250kbps
• Modulation Or Protocol: 802.15.4
• Applications: Home/Building Automation, Industrial Control, ZigBee™
• Power - Output: 2 mW (3 dBm)
• Sensitivity: -96dBm
• Voltage - Supply: 2.1 V ~ 3.6 V
• Current - Receiving: 38mA
• Current - Transmitting: 35mA
• Data Interface: PCB, Through Hole
• Antenna Connector: U.FL
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Memory Size: -

XBee ZNet 2.5/XBee‐PRO ZNet 2.5 ZigBee OEM RF Modules v1.x4x
mesh network
Destination
Device in
An end device sends data to its parent to route to the correct destination node. The
4.3.3. End Device Behavior
4.3.4. Parent Behavior
4.3.5. End Device Sleep Configuration
parent performs all of the necessary addressing and route discoveries before
Pin Sleep
Figure 4‐013.End Device: Sending Data to Parente
An end device child retrieves RF data from its parent through polling. When the end device wakes
from sleep, it sends a poll request to its parent, notifying the parent that it is awake, and
requesting any data the parent has received that was addressed to the end device child. If the
parent has data for the end device, the end device will continue polling.
The parent of an end device remains awake and can receive data packets intended for any of its
end device children. Since the end device child may be sleeping, the parent buffers any received
RF data that is destined for an end device child until the end device asks for it, or until a timeout
occurs. This timeout is settable using the SP command. The actual timeout is calculated as (2.5 *
SP), not exceeding 30 seconds.
Configuration parameters exist to customize the mechanisms for entering sleep and defining sleep
and wake times. The XBee ZNet 2.5 modules support both pin sleep and cyclic sleep modes. The
sleep mode is settable using the SM command. If SM=0, sleep mode is disabled and the device
operates as a router. If SM changes from 0 to a non-zero value, the router leaves the ZigBee
network and attempts to rejoin as an end device. For this change to be successful, the end device
must be able to join a nearby router or coordinator that is allowing end device joins. (See [Add
Reference Here] for details.)
The On/Sleep pin (pin 13) provides a hardware indication of whether the module is asleep or not.
On/Sleep is de-asserted (low) when the module enters sleep and asserted (high) when the module
wakes.
If CTS flow control is disabled (D7 command), the CTS pin is also de-asserted (high) when
entering sleep, and asserted (low) upon waking.
Pin sleep puts the module to sleep and wakes it from sleep according to the state of Sleep_RQ (pin
9). Pin sleep is enabled by setting SM to 1.
When Sleep_RQ is asserted (high), the module will finish any transmit or receive operations, and
then enter a low power state. If the module has not joined a network and Sleep_RQ is asserted,
© 2008 Digi International, Inc.
Network Address Request
Network Address Response
Route Request
Route Reply
Data
forwarding the data.
Parent
Data
(sleeping end
device)
Source
Child
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