End Device can't receive data

Zivorad Bajkovic

Other Parts Discussed in Thread: Z-STACK

Hi,

I formed a network of End Device and a Coordinator. I managed to send data form End Device to the Coordinator, but when Coordinator sends broadcast message End Device can't receive it. I saw on Packet Sniffer that message from Coordinator is sent. I set DPOLL_RATE=0 in f8wConfig.cfg so EndDevice don't bother Coordinator, but when I set DPOLL_RATE=1000 then it works but can it be done without so much Data Requests, i.e. without End Device pooling Coordinator every 1 second?

over 16 years ago

0 xyzzy over 16 years ago

TI__Expert 5255 points

As you've discovered, an End-Device must poll it's parent to receive messages. If you want to use automatic polling but 1 second is too often, try setting POLL_RATE to a larger value, such as 10000, for 10 seconds.

0 Zivorad Bajkovic over 16 years ago in reply to xyzzy

Intellectual 595 points

Thanks, once again you really helped me. Just to make it clear, the automatic polling is the only way how End-Device can receive messages from it's parent?

0 xyzzy over 16 years ago in reply to Zivorad Bajkovic

TI__Expert 5255 points

No, an End-Device doesn't have to use automatic polling. The End-Device could poll it's parent as a response to an event, such as an interrupt from a button press, expiring timer, etc. Automatic polling is a convenience provided by Z-Stack (enabled by deafault) but doesn't have to be used. If the End-Device needs to receive any messages from it's parent, it has to poll in some fashion, but that's up to the application.

0 Zivorad Bajkovic over 16 years ago in reply to xyzzy

Intellectual 595 points

OK, I didn't ask the question very well but you understood what I was aiming for, thanks for your help and I am sorry for being such annoying with my questions.

0 Tobias4760 over 16 years ago in reply to Zivorad Bajkovic

Intellectual 380 points

Hi,

If power consumption is not critical for your end device you can also set the end device to RX on when idle. Then it is alsways on RX and does not have to poll the coordinator to receive data.

Tobias

0 Zivorad Bajkovic over 16 years ago in reply to Tobias4760

Intellectual 595 points

Hi Tobias,

That is interesting, how actually can I set that?

0 Tobias4760 over 16 years ago in reply to Zivorad Bajkovic

Intellectual 380 points

Hi,

the option can also be found in f8wconfig.cfg:

-DRFD_RCVC_ALWAYS_ON=TRUE

0 Rodrigo Matias over 13 years ago in reply to Tobias4760

Prodigy 120 points

Hi,

Do you know if it is possible to switch on Power Saving mode and go back to Poll Mode and no Poll at all during run time even if I choose to set DRFD_RCVC_ALWAYS_ON=TRUE in the config file?

When I use DRFD_RCVC_ALWAYS_ON=TRUE I cannot put my End-Device in true Sleep mode. In other words, I cannot switch off the Receiver.

Regards,

RSM

0 Tomas Smith over 12 years ago in reply to xyzzy

Intellectual 840 points

hi xyzzy,

I also met this problem, I don't want to make the terminal node(end device) is in a state have been accepted, I want to make it is in low power mode. Now I have modified the DPOLL_RATE = 10000 and - DNWK_INDIRECT_MSG_TIMEOUT = 2000. But I found the terminal node accepts data will not only lose data, and accept data is wrong. Could you tell me how to solve this problem? Thanks a lot.

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End Device can't receive data