LAUNCHXL-CC26X2R1: keep sending Data request via the protocol of 802.15.4

Lawrence Lin

Hi TI team,

I used the example code of zed_switch as my End-Device and the example code of zc_light as my Coordinator under the SDK of V2.30.

I tried to sniffer packets and I found my End-Device(short addr is 0x6df0) kept sending the Data request packets via protocol of 802.15.4. You can refer to below picture and the packet number of 138.

Could I know the purpose for this kind of packets? Whether we can stop it or not?? If yes, how to stop in the SDK of V2.30.

Thanks

over 6 years ago

0 YiKai Chen over 6 years ago

Guru 735685 points

Poll rate means how fast a end device wakes up to polling its parent node for data. If you stop polling, the end device won't be able to receive any messages and it's not recommended to do so.

0 Lawrence Lin over 6 years ago in reply to YiKai Chen

Genius 4755 points

Hi YK,
Well noted.
Could I ask another question whether it(keep sending data request by using poll rate) will consume a lot of power?
Thanks

0 YiKai Chen over 6 years ago in reply to Lawrence Lin

Guru 735685 points

Yes, polling will consume lots of power. If you want to save power, you can try to enlarge polling duration.

0 Lawrence Lin over 6 years ago in reply to YiKai Chen

Genius 4755 points

Hi YK,
I found the default poll rate is 3000 ms in the example code of zed_switch(f8wconfig.opts).

I am not sure whether I read the right value in the file of f8wconfig.opts. And What value do you recommend to use, if yes??

/* The number of milliseconds to wait between data request polls to the coordinator. */
-DPOLL_RATE=3000

Thanks

0 YiKai Chen over 6 years ago in reply to Lawrence Lin

Guru 735685 points

Yes, you read the correct value and the default is 3000.

0 Lawrence Lin over 6 years ago in reply to YiKai Chen

Genius 4755 points

Hi YK,
Do you have any recommend value for the poll rate?
Thanks

0 Lawrence Lin over 6 years ago in reply to YiKai Chen

Genius 4755 points

Hi YK,
Do you have any recommend value of poll rate?
Thanks

0 YiKai Chen over 6 years ago in reply to Lawrence Lin

Guru 735685 points

60 seconds.

0 Lawrence Lin over 6 years ago in reply to YiKai Chen

Genius 4755 points

Hi YK,
I knew the poll rate will wake up the End-Device to poll data from its parent.

One more question:
Could I know how long the End-Device will enter sleep mode after it successfully connect to the Coordinator in the SDK of V2.30?
Thanks

0 YiKai Chen over 6 years ago in reply to Lawrence Lin

Guru 735685 points

If there is nothing in message queue to process, it would enter sleeping mode immediately.

0 Lawrence Lin over 6 years ago in reply to YiKai Chen

Genius 4755 points

Hi YK,
Noted.
Thanks

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LAUNCHXL-CC26X2R1: keep sending Data request via the protocol of 802.15.4