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End Device Data request polling

m_g
Intellectual 410 points

Other Parts Discussed in Thread: Z-STACK, CC2530

Hello everyone,

I have a question about data request polling. I disabled data request polling on end device by NLME_SetPollRate(0) and everything is fine,

no data request are generated, but every time when program enter ISR ( I have external interrupt in my application ) data request is generated once!?

Why this happens if I turn off data request pooling before interrupt occurs ? 

Best regards

  • 0
    TI__Genius 9325 points
    Hi milos,

    What version of Z-Stack are you using? We have never heard of that kind of issue.
    This is not directly relevant to the issue, but can you call NLME_SetResponseRate(0) and NLME_SetQueuedPollRate(0) as well in order to remove any successive poll requests?

    - Cetri
  • 0 in reply to Cetri
    Intellectual 410 points

    Hi Cetri, thank you for quick response,

    I am using 1.2.0 version of Z-stack. Now, I set DQUEUED_POLL_RATE = 0, DRESPONSE_POLL_RATE = 0 and no data requests are generated even when program enter ISR. This solves my problem but I don't understand why data requests are generated when POLL_RATE = 0 ?

    I also want to know what is maximum polling rate for end device? I see that the newRate argument ( NLME_SetPollRate() ) is type of uint16, does it mean that  the max polling rate is ~65 seconds ?

    Thanks in advance

     

  • 0 in reply to m_g
    Guru 735695 points
    1. When your application sends message, response poll rate woul take effect and do data request for response. That's why Cetri suggest you set DRESPONSE_POLL_RATE = 0.
    2. Yes, the max poll rate can be set up to ~65 seconds using API NLME_SetPollRate.
  • 0 in reply to YiKai Chen
    Intellectual 410 points
    OK, if it is so, how could I set data request polling on 15 minutes for example ? Is it good approach to set osal_timer for measuring time interval of 15 minutes and then hit one time polling? If I start osal_timer to count for 15 minutes, what is happening with end_device, does it entering sleep mode ? End_Device does not receive commands and my intention is to minimize rf activity.

    Thanks in advance
  • 0 in reply to m_g
    Guru 735695 points
    You can't set poll rate more than 65535 using this API. From my experience, it is meaningless to polling 15 minutes. In latest HA profile, the suggested polling rate for end device is 60 seconds.
  • 0 in reply to YiKai Chen
    Intellectual 410 points

    Hi YiKai Chen,

    Why do you think it is meaningless to poll parent  on 15 minutes or longer? I have configuration with sensor as end device which does some measuring and attribute reporting when external interrupt occurs, so, even if it lose parent, sensor should try to rejoin on another parent and send attribute report. Sensor does not receive any commands.

    Does cc2530 entering sleep mode if I set osal_timer event for n minutes?  

     

  • 0 in reply to m_g
    Guru 735695 points
    1.When ZED try to send message and find it can't get MAC ack from its parent node, it will turn to orphan status and try rejoin process. You don't have to reply on polling to do rejoin.
    2. Yes, cc2530 will enter sleep mode.