XBP09-DPUIT-156 Digi International, XBP09-DPUIT-156 Datasheet - Page 27

• Manufacturer Part Number: XBP09-DPUIT-156
• Description: MODULE XBEE PRO W/U.FL
• Manufacturer: Digi International
• Series: XBEE-PRO™r

Specifications of XBP09-DPUIT-156

• Frequency: 902MHz ~ 928MHz
• Data Rate - Maximum: 156kbps
• Modulation Or Protocol: FHSS
• Applications: ISM
• Power - Output: 17dBm (50mW)
• Sensitivity: -100dBm
• Voltage - Supply: 3 V ~ 3.6 V
• Current - Receiving: 80mA
• Current - Transmitting: 210mA
• 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: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 602-1168

XBee‐PRO® 900 RF Modules
Sleeping Routers
Transmitting a unicast with a known route
Transmitting a unicast with an unknown route
Transmitting a unicast with a broken route
Sleep Modes
Normal Mode (SM=0)
BroadcastTxTime=NN*NH*(MT+1)* 18mSec
When a route to a destination node is known the transmission time is largely a function of the
number of hops and retries. The timeout associated with a unicast assumes the maximum number
of hops is necessary (as specified by NH). The timeout can be estimated in the following manner:
knownRouteUnicast=2*NH*MR*unicastOneHopTime
If the route to the destination is not known the transmitting module will begin by sending a route
discovery. If the route discovery is successful and a route is found then the data is transmitted.
The timeout associated with the entire operation can be estimated as follows:
unknownRouteUnicast=BroadcastTxTime+NH*unicastOneHopTime +knownRouteUnicast
If the route to a destination node has changed since the last time a route discovery was completed
a node will begin by attempting to send the data along the previous route. After it fails a route
discovery will be initiated and, upon completion of the route discovery, the data will be transmitted
along the new route. The timeout associated with the entire operation can be estimated as
follows:
brokenRouteUnicast=BroadcastTxTime+NH*unicastOneHopTime +2*knownRouteUnicast
The Sleeping Router feature of DigiMesh makes it possible for all nodes in the network to
synchronize their sleep and wake times. All synchronized cyclic sleep nodes enter and exit a low
power state at the same time. This forms a cyclic sleeping network. Nodes synchronize by
receiving a special RF packet called a sync message which is sent by a node acting as a sleep
coordinator. A node in the network can become a sleep coordinator through a process called
nomination. The sleep coordinator will send one sync message at the beginning of each wake
period. The sync message is sent as a broadcast and repeated by every node in the network. The
sleep and wake times for the entire network can be changed by locally changing the settings on an
individual node. The network will use the most recently set sleep settings.
There are three modes of operation:
Under most circumstances a network should consist of only nodes operating in the same sleep
compatibility mode (Only SM0 nodes or only SM7 and SM8 nodes). Mesh route discovery and
routing, are incompatible between normal nodes and sleep compatible nodes.
Normal mode is the default mode for a newly powered on node. In this mode a node will not sleep,
but will synchronize to a sleeping network. When synchronized, a normal node will relay sync
messages generated by sleep compatible nodes but will not generate sync messages. Once a
normal node has synchronized with a sleeping network it can be put into a sleep compatible sleep
mode at any time.
Note: Normal Mode modules are not compatible with nodes configured for sleep. Excepting the
case of adding a new node to a sleep compatible network, a network should consist only of normal
nodes or only of sleep compatible nodes.
© 2009 Digi International, Inc.
• SM0 - Normal Mode (not sleep compatible)
• SM7 - Sleep Support Mode (sleep compatible, not low power)
• SM8 - Cyclic Sleeping Mode (sleep compatible, low power).
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