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CC1312R7: WiSUN FAN Reconnection issue

Pei-Wen Huang
Prodigy 30 points
Part Number: CC1312R7
Other Parts Discussed in Thread: SYSCONFIG

Hi,

I used simplelink_cc32xx_sdk_7_10_00_13 sdk TI WiSUNFAN stack with CC1312R7 to develop an mesh network.

I followed this article to enable BR and RN to connect to each other (https://dev.ti.com/tirex/content/simplelink_academy_cc13xx_cc26xxsdk_6_10_01_00/modules/ti_wisunfan/wisun_fundamentals/wisun_fundamentals.html)

I did the following test:

I connect BR and RN to each other, power off RN and than power on again. 

At the same time, BR continues to powered on. The reconnect time is about 90 seconds.

I want to speed up the reconnect time.

I tried to enable NV to store keys, but it didn't seem look like has changed.
EAPOL Layer — SimpleLinkTm CC13XX/CC26XX SDK TI Wi-SUN FAN 1.0 Stack User's Guide 2.10.00.00 documentation

Is there any way to reduce this reconnect time?

Thank you in advance.

  • 0
    TI__Guru* 76451 points

    Hi Pei-Wen,

    There are a few factors affecting join time, like the datarate, number of channels and the channel dwell time. However if you reconnect time is 90 s I'm not sure how much lower it will go.

    Cheers,

    Marie H

  • 0 in reply to Marie H
    Prodigy 30 points

    Hi Marie H,

    We expect that BR and RN have been connected, and the keys should be stored to the NV. So the next connection time would be shortened.

    So, we want to reduce the reconnect time to 20~30 seconds.

    Thank you.

  • 0 in reply to Pei-Wen Huang
    TI__Intellectual 995 points

    Hello Pei-Wen,

    could you please specify which PHY you are using right now? Did you change it from the standard Mode 2 in the example?
    In general, selecting a higher data-rate PHY will decrease the reconnect time.

    Also you could try to decrease the broadcast dwell time and the broadcast interval through the MAC settings in SysConfig.
    Try 200 and 300ms respectively.

    Let me know if this improved the performance.

    Best regards
    Manuel