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Broadcast messages

roapangua
Prodigy 50 points


Could be a problem in terms of datarate, to use broadcast messages to send information to all nodes in a mesh(Zigbee Pro)?

I  need to send information between nodes using broadcast messages, but with a speed up to 3-4 kbps.

Can I have any problem?

 

Thanks

  • TI__Expert 4155 points

    The frequency an application could send a broadcast message within Zigbee is restricted by
    a broadcast "settling time"

    From nwk_globals.c:

    / BROADCAST SETTINGS:
       // *******************
       //   Broadcast Delivery Time
       //     - set to multiples of 100ms
       //     - should be 500ms more than the retry time
       //       -  "retry time" = PassiveAckTimeout * (MaxBroadcastRetries + 1)
       //   Passive Ack Timeout
       //     - set to multiples of 100ms
       _NIB.BroadcastDeliveryTime = zgBcastDeliveryTime;
       _NIB.PassiveAckTimeout     = zgPassiveAckTimeout;
       _NIB.MaxBroadcastRetries   = zgMaxBcastRetires;

    The number of simultaneous broadcasts is also controlled by the MAX_BCAST setting in f8wconfig.cfg.