• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 55 subscribers
  • Views 353 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Lighting gateway SW issues

Manuel Menchaca
Expert 2035 points

Other Parts Discussed in Thread: CC2531

I have issues about the new Lighting Gateway (ZLL),

-What is the maximum number of devices that the gateway can allow it?

-Is It the number of devices allowed by the gateway limited by the CC2531, or by Beagle memory?

Thanks!

  • 0
    Guru 735695 points

    If there is no ZR, it is limited by the CC2531 which is coordinator. If you add ZR into the network, it depends on how you config your ZC and ZR.

  • 0 in reply to YiKai Chen
    TI__Genius 9180 points

    Correct, the maximum number of devices on the network is limited by the configuration of the gateway as well as the routers (that may be from other manufacturers and not be under your control). The beaglebone contains a data base of devices that are on the network, but given the amount of memory available this is negligible. As information of the devices on the network is on beaglebone and not the CC253x there is no application layer device table on CC253x that consumes memory, the limit is from the neighbour tables and routing tables of the coordinator and routers.

    However this is a lighting network and the consumer expects very low latency for controlling the lights, as such you do not want to have routing requests happening too often, so for Lighting networks there are other limitations beyond the max number of devices that the coord and routers will accept on the network.

    There have been multiple tests with TI lights and other vendors lights, with the typical stack settings we see that the maximum with acceptable (low) latency is typically 40-50 Lights. Unfortunately as your end customer (the consumers) may have routers on the network that are from other manufactures (with different ZigBee Stack vendors) it is not something that can be easily predicted.

    If your network contains only your Lights (all ZigBee stack settings are under your control), and you want to control more than 40-50 lights then you should extend the routing table size in fw8config.h:

    /* Number of entries in the regular routing table plus additional
    * entries for route repair
    */
    -DMAX_RTG_ENTRIES=40

    This will address the latency issue caused by too many devices on the network.

    Regards, TC.