CC2640R2L: Encrypted connection

Part Number: CC2640R2L

Hi Team,

I have two questions about encrypted pairing.

1. I have set the option after pairing to 'false' during the initial setup, but the device will still be automatically bound after the successful connection with the mobile phone. The code I set is as follows.

    // Don't send a pairing request after connecting; the peer device must
    //uint32_t passkey = 0; // passkey "000000"
    // initiate pairing
    uint8_t pairMode = GAPBOND_PAIRING_MODE_INITIATE;
    // Use authenticated pairing: require passcode.
    uint8_t mitm = TRUE;
    // This device only has display capabilities. Therefore, it will display the
    // passcode during pairing. However, since the default passcode is being
    // used, there is no need to display anything.
    uint8_t ioCap = GAPBOND_IO_CAP_DISPLAY_ONLY;    
    // Request bonding (storing long-term keys for re-encryption upon subsequent
    // connections without repairing)
    uint8_t bonding = FALSE;

    uint8_t gapbondSecure = GAPBOND_SECURE_CONNECTION_NONE;//GAPBOND_SECURE_CONNECTION_ONLY ;

    GAPBondMgr_SetParameter(GAPBOND_SECURE_CONNECTION, sizeof(uint8_t), &gapbondSecure);
    //GAPBondMgr_SetParameter(GAPBOND_DEFAULT_PASSCODE, sizeof(uint32_t), &passkey);
    GAPBondMgr_SetParameter(GAPBOND_PAIRING_MODE, sizeof(uint8_t), &pairMode);
    GAPBondMgr_SetParameter(GAPBOND_MITM_PROTECTION, sizeof(uint8_t), &mitm);
    GAPBondMgr_SetParameter(GAPBOND_IO_CAPABILITIES, sizeof(uint8_t), &ioCap);
    GAPBondMgr_SetParameter(GAPBOND_BONDING_ENABLED, sizeof(uint8_t), &bonding);

2. I entered the key connection event after starting the configuration. According to my needs, if the connection key is entered incorrectly, the connection will be disconnected. But after I entered the wrong key, the device connected quickly instead. Is there something wrong with the code I have set up here?

I added a disconnect handler event in the event after pairing was completed.

/*********************************************************************
 * @fn      SimplePeripheral_processPairState
 *
 * @brief   Process the new paring state.
 *
 * @return  none
 */
static void SimplePeripheral_processPairState(spPairStateData_t *pPairData)
{
  uint8_t state = pPairData->state;
  uint8_t status = pPairData->status;

  switch (state)
  {
    case GAPBOND_PAIRING_STATE_STARTED:
      Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Pairing started");
      break;

    case GAPBOND_PAIRING_STATE_COMPLETE:
      if (status == SUCCESS)
      {
        Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Pairing success");
      }
      else
      {
        //Disconnected 
        HCI_EXT_DisconnectImmedCmd();

        Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Pairing fail: %d", status);
      }
      break;

    case GAPBOND_PAIRING_STATE_ENCRYPTED:
      if (status == SUCCESS)
      {
        Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Encryption success");
      }
      else
      {
        Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Encryption failed: %d", status);
        //HCI_EXT_DisconnectImmedCmd();
      }
      break;

    case GAPBOND_PAIRING_STATE_BOND_SAVED:
      if (status == SUCCESS)
      {
        Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Bond save success");
      }
      else
      {
        //Display_printf(dispHandle, SP_ROW_CONNECTION, 0, "Bond save failed: %d", status);
          //HCI_EXT_DisconnectImmedCmd();
      }
      break;

    default:
      break;
  }
}

Regards,

Katherine