RTOS/CC2541: CC2541 paired timeout setting.

Hank Zhang

Expert 2040 points

Part Number: CC2541

Tool/software: TI-RTOS

In order to consider security, we consider BLE to establish a connection at the beginning of the connection, and the bluetooth side requires the phone to enter the matching password immediately.

Current debugging:

1. The Characteristic Value attribute is configured with GATT_PERMIT_AUTHEN_READ | GATT_PERMIT_AUTHEN_WRITE;

2.The pairing parameters are configured with GAPBOND_PAIRING_MODE_INITIATE;

Now the test establishes the BLE connection, and the mobile phone will receive the pairing request immediately, and the function is normal.

Question:

How to set the pairing timeout period of CC2541?

over 7 years ago

0 Marie H over 7 years ago

TI__Guru* 82121 points

Hi Hank,

The Bluetooth Core Spec defines the time-out to be 30 seconds. You cannot change this value.

0 Hank Zhang over 7 years ago in reply to Marie H

Expert 2040 points

Hi Marie
How to determine bluetooth pairing success, which interfaces need to be invoked?

0 Marie H over 7 years ago in reply to Hank Zhang

TI__Guru* 82121 points

Hi Hank,

I don't understand your question.

If pairing is successful a Pairing Confirm packet is sent over the air. This is received as a GAPBOND_PAIRING_STATE_COMPLETE event in the application.

0 Hank Zhang over 7 years ago in reply to Marie H

Expert 2040 points

When the BLE connection is successful, start the timer immediately. If the pairing fails within 2 seconds, disconnect the BLE.
How do you determine the "paired failure or successful" in code ?

0 Marie H over 7 years ago in reply to Hank Zhang

TI__Guru* 82121 points

Hi Hank,

Here is the code for the event (from SimpleBLECentral.c):

else if ( state == GAPBOND_PAIRING_STATE_COMPLETE )
  {
    if ( status == SUCCESS )
    {
      LCD_WRITE_STRING( "Pairing success", HAL_LCD_LINE_1 );
    }
    else
    {
      LCD_WRITE_STRING_VALUE( "Pairing fail", status, 10, HAL_LCD_LINE_1 );
    }
  }

As you can see, the event contains a status field that you can check.

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RTOS/CC2541: CC2541 paired timeout setting.