CC2564C: CC2564

nick t

Part Number: CC2564C
Other Parts Discussed in Thread: CC2564

I based on the HOGPDemo for the software development, I got the problem on the reconnect. I would like to bond to the iphone and auto reconnect. However, its not able to reconnect and I need to re-pairing to make a success connection.

During the reconnection, its able to resolved the address and process the authorization event. However it will be disconnect immdeiately with reason 0x3D return.

I suspect if the irk and ltk are not exchanged correctly. Could you advise how could i verify if the encryption key is exchanged correctly?

this is the iphone and HOGP's pairing capability

IIphone:
IO Capability: lcKeyboardDisplay.
MITM: TRUE.
Bonding Type: Bonding.
OOB: OOB Not Present.
Encryption Key Size: 16.
Sending Keys:
LTK: YES.
IRK: YES.
CSRK: NO.
Receiving Keys:
LTK: YES.
IRK: YES.
CSRK: NO.

HOGP ConfigureCapabilities device pairing capability
IO Capability: lcNoInputNoOutput.
MITM: FALSE.
Bonding Type: Bonding.
OOB: OOB Not Present.
Encryption Key Size: 16.
Sending Keys:
LTK: YES.
IRK: NO.
CSRK: NO.
Receiving Keys:
LTK: NO.
IRK: YES.
CSRK: NO.

Regards

Nicky

over 6 years ago

0 nick t over 6 years ago

Prodigy 210 points

KB_260419_02.log Reconnect_Failure_Log.txtHi

I attached the log of logger5.0 and debug message for your reference

Nicky

0 Vihang Parmar over 6 years ago in reply to nick t

TI__Mastermind 29291 points

Nick,

Since the BLE security manager protocol is in the host stack, it is considered transparent data for the CC2564 controller. Thus, the firmware logs (*.lgr) will not be much of a help here. Could you please share the application level debug prints (e.g. from the HOGP Demo of the SDK)? Additionally, air logs captured with Bluetooth sniffer (e.g. frontline or ellisys sniffer) may be helpful in understanding the issue as well.

Best regards,

Vihang

0 nick t over 6 years ago in reply to Vihang Parmar

Prodigy 210 points

Hi

I found some way to store ltk and able to connect now.

I found the issue is the ltk that I sent to iPhone.
Based on hogpdemo, it will regenerate the ltk every re connect authorization

Based on the key regeneration api, there is input of ediv and rand. What value and what's the source of this input from?

Before the key regeneration, do I need to process any other functions first?

Regards
Nicky

Regards
Nicky

0 Hari Nagalla over 6 years ago in reply to nick t

TI__Mastermind 27080 points

Humm.. I believe, they (EDIV, Rand) are the outputs from the function. Please, check the function signature and description in "BluetopiaCoreAPI.pdf" in the SDK documentation folder..

Thanks

0 nick t over 6 years ago in reply to Hari Nagalla

Prodigy 210 points

Hi

Based on the doc and the sdk code description, they are the inputs for this function

Regards
Nicky

0 Hari Nagalla over 6 years ago in reply to nick t

TI__Mastermind 27080 points

EDIV and Rand are outputs from 'GAP_LE_Generate_Long_Term_key'.. Where, as 'GAP_LE_Regenrate_Long_term_key' takes these as inputs.

Bluetooth®︎

Bluetooth forum

CC2564C: CC2564