nrf52832 RTT log printing problem encountered by pairing and binding

[Pea Wang]

Hi,

today I adjusted the LOG printing level to DEBUG during the pairing and binding test, and found that the pairing and binding password RTT could not be printed during the pairing. When I input a password at will, the RTT will print the password after the pairing fails. I tested and the serial port printing secret key RTT LOG printing returned to normal again. What caused the problem.The SDK is v15.0 and softdevice for S132.

can you help me?

best wish

                                                                                                                                                     Pear Wang

[Marjeris Romero]

Hi,

Sorry for the late reply. Can you post the code you are using to print the pairing key? Are you doing this in main.c or in another file?

Best regards,

Marjeris

[Pea Wang]

case BLE_GAP_EVT_PASSKEY_DISPLAY:
{
char passkey[PASSKEY_LENGTH + 1];
memcpy(passkey, p_ble_evt->evt.gap_evt.params.passkey_display.passkey, PASSKEY_LENGTH);
passkey[PASSKEY_LENGTH] = 0;
// Don't send delayed Security Request if security procedure is already in progress.
err_code = app_timer_stop(m_sec_req_timer_id);
APP_ERROR_CHECK(err_code);
printf("Passkey:");
for(int i=0;i<6;i++)
{
printf("%c", p_ble_evt->evt.gap_evt.params.passkey_display.passkey[i]);
}
printf("\r\n");
NRF_LOG_INFO("Passkey: %s", nrf_log_push(passkey));
}break;

[Pea Wang]

Thanks for the reply, I was in main.c do this.This code is normal, but when I only use LOG to print the pairing key, the key will not be printed during pairing. Uart does not have this problem.

[Marjeris Romero]

Hi,

Sorry for the very late reply. If you are stil struggling with this can you try to add NRF_LOG_FLUSH() after NRF_LOG_INFO() and see if that helps?

NRF_LOG_INFO("Passkey: %s", nrf_log_push(passkey));
NRF_LOG_FLUSH();

BR,

Marjeris