disable encryption uart ble code

[Ali97]

Hi Folks, I am playing with uart ble example described in this link (devzone.nordicsemi.com/.../).

However, I would like to disable encryption on BLE link. I was trying to modify the c code of this example but I couldn't disable BLE encryption

Could you please advice me to disable encryption ?

[Petter Myhre]

Usually the question is on how to enable encryption :)

I'm not sure what SDK and SoftDevice you are using, but you should handle the BLE_GAP_EVT_SEC_PARAMS_REQUEST event. Something like:

    case BLE_GAP_EVT_SEC_PARAMS_REQUEST:
        // Pairing not supported
        err_code = sd_ble_gap_sec_params_reply(m_conn_handle, BLE_GAP_SEC_STATUS_PAIRING_NOT_SUPP, NULL, NULL);
        APP_ERROR_CHECK(err_code);
        break;

[Petter Myhre]

If the BLE_GAP_EVT_SEC_PARAMS_REQUEST event is not received the peer doesn't try to pair (and encrypt) the link and the link will not be encrypted.