What are the required Parameters to enable LTK encryption ?

Tanmay Sane94

Other Parts Discussed in Thread: CC2540

Hello Friends,

I am trying to enable encryption in the SimplePeripheral and Keyfob example. Herein I am able to ensure pairing but not able to establish encryption. Do we need to pass any other parameters apart from those mentioned below? After the GAP_HCI_ExtentionCommandStatus Success, I encounter event 0x60A GAP_AuthenticationComplete with Status 0x04, Msg. Buffer Not Available.

These are the parameters I am trying to configure.

uint32 passkey = 000000;
uint8 pairMode = GAPBOND_PAIRING_MODE_WAIT_FOR_REQ;
uint8 mitm = TRUE;
uint8 ioCap = GAPBOND_IO_CAP_DISPLAY_ONLY;
uint8 bonding = TRUE;

Do I also need to configure for GAPBOND_KEY_DIST_LIST?

Regards,

over 10 years ago

0 Aslak N. over 10 years ago

TI__Mastermind 23440 points

Hi,

The error message is more likely "SMP_PAIRING_FAILED_CONFIRM_VALUE 0x04". Which means that the pass-key entered was not as expected.

Try doing GAPBOND_IO_CAP_NO_INPUT_NO_OUTPUT instead of _DISPLAY_ONLY to avoid pin-entry at all.

You shouldn't have to configure KEY_DIST_LIST.

BR,
Aslak

0 Tanmay Sane94 over 10 years ago in reply to Aslak N.

Prodigy 55 points

Hi Aslak,

Thanks for the response. I will try testing with this one but with a central and peripheral I am able to have a successful pairing but this issue seems to arise with the CC2540 dongle acting as a device monitor.

Thanks again,
Regards,
Tanmay

0 Aslak N. over 10 years ago in reply to Tanmay Sane94

TI__Mastermind 23440 points

Ah, I see. The BLE Device Monitor does not support pairing. Try using BTool instead, although more complex it supports pairing and all other commands that are available via the serial interface.

Aslak

0 Tanmay Sane94 over 10 years ago in reply to Aslak N.

Prodigy 55 points

Hey Hi,

Thanks again for the quick response Aslak. I am sorry, this was with the BTool itself.

Regards,
Tanmay

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What are the required Parameters to enable LTK encryption ?