• State
  • Locked Locked
  • Replies 4 replies
  • Subscribers 55 subscribers
  • Views 593 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.

Data path with eZ430-RF2480 router

Maxime GUYON
Expert 1035 points

Hello,

I have one question about the demo application included with eZ430-RF2480 demo kit.
We can see the network with the application ZigBee Sensor Monitor and so we know the data path of temperature and voltage.

I have 3 device on my example, one sink (coordinator) and two router.:

The first router is directly connected to the coordinator (sink) and the second router is connected with the first router.
I disconnect the first router (power shutdown) and the second remain always connected and transmit data... How is it possible?

What is the data path? In the CC2480 dev guide i read this sentence:

"Router devices can also move, even though that is not a typical scenario since they are mainspowered devices and are thus unlikely to be portable. However, in the case that a router device does move, it does not do a rejoin process nor does it change its 16-bit short address"

So normally the second router must be disconnected too since it will not process to a rejoin process?

Thank you in advance

Max.

 

 

  • 0
    Expert 1035 points

    Noboby can help me?

  • 0 in reply to Maxime GUYON
    TI__Genius 17270 points

    Hello Maxime,

    Is the second node within the read range of the coordinator when the middle router is put in power down mode? What happens if you move away the 3rd node farther away from the coordinator? I would think that the second node is connected to the coordinator if it is within the range of it.

    -M.

  • 0 in reply to Mizanur Chowdhury
    Expert 1035 points

    Hello,

    All module are close to each other so:

    "Is the second node within the read range of the coordinator when the middle router is put in power down mode?": YES

    Here is a description of my process:

    First i power supply and connect the first router to the coordinator.
    After that, i push the button on the coordinator in order to block binding of the second router to the coordinator.
    So next i power supply the second router and so he is connected to the first router since the coordinator doesn't accept more connections. 

    On the picture obove we can see that the second router is connected to the first router, but not to the coordinator.

    So at this moment i shut down the first router and so it seem the second router is always "connected" to the first router wich redirects data to the coordinator,
    but in fact the first router is down so it's impossible! 

    At this moment if i move the second router (third node) far away from the coordinator, all the router disappear on the screen, (only the coordinator is always present).

    If i come back near the coordinator with the second router, all the router come back on the screen as before (with always the first router in grey).

    Can you explain that?

  • 0 in reply to Maxime GUYON
    Expert 1035 points

    In the ZSensorMonitor user guide i see that a grey router is a dummy router:

    "A dummy router. If we don’t receive any message from a router within the configured time interval, it can be assumed that the node is out of service. However, if the node has child nodes that are still alive, the node will not be removed, it will be changed to a “dummy router”."

    And we can also read:

    "The nodes are connected with arrows to show the relationship between parent and child nodes based on the CSKIP3 addressing scheme. This relationship is with respect to addressing, and does not necessarily reflect the path taken for routing messages between a source and the sink."

    So it can explain my problem but so my network is a "mesh" network?
    I want to say that if a router loose the connection with another router, another path is found? Is this alright?