XBee‐PRO®900HP/XBee‐PRO®XSCRFModules
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RX_MY = Receiver Source Address
XBee-PRO XSC Basic Communications
Basic Communications are accomplished through two sub-types:
• Broadcast - By default, XStream Modules communicate through Broadcast communications
and within a peer-to-peer network topology. When any module transmits, all other modules
within range will receive the data and pass it directly to their host device.
• Addressed - If addressing parameters match, received RF data is forwarded to the DO (Data
Out) buffer; otherwise, the RF data is discarded.
When using Basic Communications, any functions such as acknowledgements are handled at the application
layer by the integrator. The Broadcast Modes provide transparent communications, meaning that the RF link
simply replaces a wired link.
Streaming Mode (Default)
Characteristics: Highest data throughput
Lowest latency and jitter
Reduced immunity to interference
Transmissions never acknowledged (ACK) by receiving module(s)
Required Parameter Values (TX Module): RR (Retries) = 0
Related Commands: Networking (DT, MK, MY), Serial Interfacing (PK, RB, RO, TT)
Recommended Use: Mode is most appropriate for data systems more sensitive to latency and/or jitter than
to occasional packet loss.
Streaming Mode Data Flow
StreamingModeStateDiagram(TXModule)
Events & processes in this mode are common to all of the other RF Modes.
NOTE: When streaming data, RB and RO parameters are only observed on the first packet.
After transmission begins, the TX event will continue uninterrupted until the DI buffer is empty or
the streaming limit (TT Command) is reached. As with the first packet, the payload of each subse-
quent packet includes up to the maximum packet size (PK Command).
Receive Packet: extract
TX_DT
Source &
Destination
Addressing Enabled
(RX_MY= 0xFFFF)?
TX_DT & RX_MK =
RX_MK?
TX_DT = RX_DT?
TX_DT = RX_MY?
Local Address: Accept
Packet
Reject Packet
Global Address: Accept
Yes
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