source binding and groupcast for end devices

Kyle Zhou

Two problems when using end devices.

1) source binding to bind an end device to a group:

The end device has the REFLECTOR macro defined, and the call to bindAddEntry() succeeded. But the group does not receive what the end device transmits.

2) groupcast where an end device has the group membership:

The end device is added to the group by calling aps_AddGroup(), which returns success. But it never receives groupcast. It does receive broadcast.

When I configure the node as router instead of end device, everything works fine.

Any hints? What is difference between an end device and a router? Any changes are needed?

over 12 years ago

0 YiKai Chen over 12 years ago

Guru 735695 points

ZED is a power saving device and under slepping for most time. It only wakes uo periodically to polling data from its parents so the broadcast or multicast message might be missed if it is sleeping. Shorten the period of polling rate might help but no guarentee that ZED can receive message without missing.

0 Kyle Zhou over 12 years ago in reply to YiKai Chen

Expert 1240 points

Thanks Yikai.

But I don't think it is related to sleeping, since broadcast works. Only groupcast does not.

Any more hints?

0 YiKai Chen over 12 years ago in reply to Kyle Zhou

Guru 735695 points

I would suggest you to use packet sniffer and check if the multicast message is sent out. If yes, we can narrow the problem to receiver side.

0 Kyle Zhou over 12 years ago in reply to YiKai Chen

Expert 1240 points

yes, the groupcast is sent out because other router nodes in the group receive it.

0 Kyle Zhou over 12 years ago in reply to Kyle Zhou

Expert 1240 points

I am wondering how long the router will keep groupcast packets for its children to poll? Currently I used the default end device setting for 1 second polling. Thought that should be enough. Am I right?

0 Farhad Kafi over 9 years ago in reply to Kyle Zhou

Intellectual 860 points

I have same problem. When the source device send commands to end-device with (DRFD_RCVC_ALWAYS_ON=FALSE)and using groupcast ,it dosen't receive commands.
Any Suggestion ???

0 YiKai Chen over 9 years ago in reply to Farhad Kafi

Guru 735695 points

Do you see the command is sent in sniffer?

0 Farhad Kafi over 9 years ago in reply to YiKai Chen

Intellectual 860 points

Yes.I check it with Ubiqua packet analyzer. When i set (DRFD_RCVC_ALWAYS_ON=TRUE) end-device response to groupcast commands. But when (DRFD_RCVC_ALWAYS_ON=FALSE) it doesn't response .

0 YiKai Chen over 9 years ago in reply to Farhad Kafi

Guru 735695 points

Sleeping device won't be able to receive groupcast and broadcast data.

0 Farhad Kafi over 9 years ago in reply to YiKai Chen

Intellectual 860 points

I'm sure it supports broadcast and other address modes except groupcast dear YiKai. Are you sure EDs do not support Broadcast?

0 YiKai Chen over 9 years ago in reply to Farhad Kafi

Guru 735695 points

I might describe it in the wrong way. Let's say ZED uses polling to get data from parent node and broadcast/groupcast messages won't stay on ZC/ZR for a long time. Unless sleeping ZED does polling while broadcast/groupcast message is still on ZC/ZR, ZED won't be able to receive broadcast/groupcast message.

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source binding and groupcast for end devices