RTOS/LAUNCHXL-CC2640R2: How to check if a device is paired and/or bonded with cc2640?

pawelN

Part Number: LAUNCHXL-CC2640R2
Other Parts Discussed in Thread: CC2640

Tool/software: TI-RTOS

I am using project_zero/multi_role hybrid example from SDK 1.50.0.58.

I am looking for some kind of a function or just a way to simply determine whether a device (an android smartphone) is paired with CC2640 and similar one to find if it is bonded. Let's say that I got simultanously 4 devices connected and only two of them are bonded and have their keys stored in CC2640's SNV.

Something like

uint8_t isPaired(uint8_t connectionHandle) { .... }

would be sufficient :)

I have seen but couting the bonds number, resetting the CC2640 and counting again isn't an option for me.

Any ideas?

thanks

over 5 years ago

0 Katie Pier over 5 years ago

TI__Guru 68116 points

Hi pawel,

Can you elaborate a little on what you are trying to do by finding if a particular device is bonded? It might help us to give you better suggestions for your end goal.

I think you should be able to simply read the SNV bond record data. Looking at this other post: e2e.ti.com/.../2472963 you can see discussed how you could use osal_snv_read() dev.ti.com/.../memory_management.html to read the LTK. I think you could do something similar if you have the NV ID to instead read the Bond Record http://dev.ti.com/tirex/content/simplelink_cc2640r2_sdk_1_50_00_58/docs/blestack/ble_user_guide/html/ble-stack-3.x/gapbondmngr.html?highlight=snv#gapbondmgr-and-snv (using GAP_BOND_REC_ID_OFFSET) which contains the publicAddr and reconnectAddr for the device. By searching all bond records, you could figure out if a particular device is bonded or not.

Regards,
Katie

0 pawelN over 5 years ago in reply to Katie Pier

Prodigy 225 points

Hello

thanks for response

I would like to implement auto-disconnecting after a specified time. My pairMode is GAPBOND_PAIRING_MODE_WAIT_FOR_REQ because INITIATE didn't work well when I tried, otherwise I would just use default 30s pairing timeout. Scenario:

* android1 (master) connects to cc2640 (slave),

* android can now choose whether to begin pairing or not

* if after X seconds master isn't paired with slave it gets disconnected

This is important because cc2640 has got limited connection slots and I don't want connected nonpaired devices to occupy it.

0 Katie Pier over 5 years ago in reply to pawelN

TI__Guru 68116 points

Hi pawelN,

Were you able to use the method I recommended to check the bond data?

Regards,
Katie

0 pawelN over 5 years ago in reply to Katie Pier

Prodigy 225 points

Hi,

Sorry for not responding. I managed to compare connected device address with the address stored in the bond data and this is enough for me to tell if it is paired but haven't tested it yet. I was working on different topic.

And yes, your hints were helpful.

0 Katie Pier over 5 years ago in reply to pawelN

TI__Guru 68116 points

Great! Let us know if you run into any issues when you test it.
-Katie

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RTOS/LAUNCHXL-CC2640R2: How to check if a device is paired and/or bonded with cc2640?