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CC2640: CC2640F128 BLE 2.2.1 STACK disconnected after about 20S

zhl cui
Prodigy 20 points
Part Number: CC2640
Other Parts Discussed in Thread: CC2540

Hi EE

I have designed a sensor product based on cc2640f128 .now I have meet a problom .

after I connect product to android phone about 20 seconds , the connection lost 

I have captured logs ,it seems that after centuer device send LL_Channel_Map_Req many times, then it lost.

can you help me logs.psd

  • 0
    TI__Mastermind 25035 points

    Hi,

    Do you see this issue with only the android phone, does it happen with using another cc2640 as a central device? Does the application change the connection parameters, can you disable it?

    Best wishes

  • 0 in reply to Zahid Haq
    Prodigy 20 points

    Hi,

    thanks for you reply.

    I found it can communication with another android phones like huawei and xiaomi except the one that I used before.

    And I connect it with cc2540 dongle ,then it is the same as before(disconnect after i connect)