CC2642R: DH key check fail in pairing

Simon Huo

Intellectual 1930 points

Part Number: CC2642R

My customer found an issue in pairing procedure that can be reproduced in out of box example code.

SDK: 6.40

Environment: launchpad

Reproduce method:

CC2642 connect and bond to phone 1.
Use phone 2 connect to CC2642 and see the pairing frame on phone that ask you to type in pin code.
Type in right code and press confirm on phone 2.
Disconnect phone 1.
We can see phone 2 pairing procedure will fail at SMP stage 2, with reason “DH key check fail”. Phone 2 will terminate this connection after a few seconds.
If we restart connecting and pairing procedure on phone 2, this issue will disappear.

over 2 years ago

0 Clément over 2 years ago

TI__Guru** 101460 points

Hi Simon,

Thank you for reporting this issue. One of our engineers will open a ticket so the issue can be addressed in a future release.

If more details are required, we will contact you.

Best regards,

0 Guillaume over 2 years ago in reply to Clément

TI__Expert 5150 points

Hi Simon,

Can you provide me the exact name of the project? Is it Simple peripheral or project zero?

Also can you detail a bit more the number of the SDK : simplelink_cc13xx_cc26xx_sdk_6_40_00_13?

Finally, what was the phone OS they used for the test?

Thanks and regards,

0 Simon Huo over 2 years ago in reply to Guillaume

TI__Intellectual 1930 points

Hi Guillaume,

1. simple_peripheral

2.Yes simplelink_cc13xx_cc26xx_sdk_6_40_00_13, also reproducible on 5_20_00_52 and 6_30_00_84. I did not try on other versions.

3. for my test procedure, phone 1 is "Xiaomi" which is running in Android, phone 2 is iPhone running in IOS16

P.S. for my steps please make sure the time gap between step 3 and 4 is fast.

+1 Guillaume over 2 years ago in reply to Simon Huo

TI__Expert 5150 points

Hi Simon,

I reproduced your issue but not on each attempts, could you provide me a Bluetooth Sniffer log when this issue occurs to be sure that we are talking about the same one?

Also, what app are you using on both phones?

I would like to have enough details to open a ticket on that issue, but than you for reporting this one!

Thanks and Regards,

0 Simon Huo over 2 years ago in reply to Guillaume

TI__Intellectual 1930 points

Turning to email, close this one

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CC2642R: DH key check fail in pairing