CCS/CC2640R2F: Pairing Error Code 4

Christian Hornhuber

Part Number: CC2640R2F

Tool/software: Code Composer Studio

Hi,

Recently I am experiencing paring error code 04 a lot, when I am testing my devices. According to the source code the error is SMP_PAIRING_FAILED_CONFIRM_VALUE.

Can someone explain me, what the problem is during paring.

Edit:

The interesting thing is, that I am using the same firmware on different devices and at some devices no pairing error occurs and other ones it does!!

For testing the connection, I am using my IPhoneSe and the LightBlue App.

The firmware is a modified version of the original ProjectZero tutorial code.

The Bond Manager Init is:

uint32_t passkey = 0; // passkey "000000"
uint8_t pairMode = GAPBOND_PAIRING_MODE_WAIT_FOR_REQ;
uint8_t mitm = TRUE; 
uint8_t ioCap = GAPBOND_IO_CAP_DISPLAY_ONLY;
uint8_t bonding = FALSE;

Thank you

Christian

over 6 years ago

0 Evan W over 6 years ago

TI__Mastermind 40420 points

Christian,

Have you erased the pairing information in your phone prior to trying to initiate a new pair?

If the phone still has old bond/pairing info and the TI device has erased that info, the phone has no way of knowing this and will attempt to re-encrypt the link based on the previous pairing info which can lead to a pairing failure.

You can erase old bond info by going to general>bluetooth>delete pairs

0 Christian Hornhuber over 6 years ago in reply to Evan W

Intellectual 420 points

Hi Evan,

I was thinking the same way. So I was using my IPad and a Android phone. But at both cases, the same error occurs.

This tells me that the problem is in the firmware.

Christian

0 Evan W over 6 years ago in reply to Christian Hornhuber

TI__Mastermind 40420 points

Christian,

Are you saying you confirmed that you removed the bond from the phone from your first pair? Or is it just failing every time (including the first time)? Also, do you have sniffer logs of the event?

0 Christian Hornhuber over 6 years ago in reply to Evan W

Intellectual 420 points

Hi Evan,

No, I was not able to delete the pairs. I couldn't find it in my IPhone. That is the reason, I was using other Phones, which were never connected before to the TI devices. -> Same Problems at the first pair.

How can I activate the sniffer logs?

Christian

0 Evan W over 6 years ago in reply to Christian Hornhuber

TI__Mastermind 40420 points

Christian,

You need a bluetooth sniffer. For instance, you can use ours here: http://www.ti.com/tool/PACKET-SNIFFER

Or you can use a Frontline or Ellisys tool.

What SDK version are you using?

0 Christian Hornhuber over 6 years ago in reply to Evan W

Intellectual 420 points

Hi Evan,

Thank you for the link. I will try this out today.

I am using SDK version 3.10.00.15 for the chip CC2640R2.

Christian

0 Christian Hornhuber over 6 years ago in reply to Christian Hornhuber

Intellectual 420 points

Hi,

I am using the latest SDK version (3.10.00.21) now. It seams that it is working now. I will keep you informed, if I notice again this error.

Thank you

Christian

Bluetooth®︎

Bluetooth forum

CCS/CC2640R2F: Pairing Error Code 4