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;

[Ali97]

Thank you Petter for your answer. I am using nRF5 SDK 12.2. And SoftDevice is 132..

Could you please tell me where (in the uart ble example) to find the segment of c code you suggest to modify?

Thank you again!

[Petter Myhre]

Shouldn't be too hard to find. It is in on_ble_evt() in main.c

[Ali97]

Thank again petter for your comment. I have quick question just to make sure that I am on the right track; by disabling encryption on BLE link, data on the air will be whitened data (no encryption no other manipulation), right?

[Petter Myhre]

That is correct.

[Ali97]

Hi, I found the code you listed above. However, it seems that the program does not call it. Is there any way to make sure that BLE link is not encrypted? i.e. encryption is disabled.