BLE connection with NRF toolbox

RE: BLE connection with NRF toolbox

Roei — Tue, 04 Feb 2020 14:12:48 GMT

Problem solved. Thanks!

RE: BLE connection with NRF toolbox

Amanda Hsieh — Tue, 04 Feb 2020 08:02:42 GMT

Could you use BLE_GAP_CONN_SEC_MODE_SET_OPEN and modify the security_req_t cccd_write_access = SEC_MITM?

Please let me know this helps or not. Thanks.

-Amanda H.

RE: BLE connection with NRF toolbox

Roei — Tue, 04 Feb 2020 07:49:17 GMT

Hi Amanda,

I don't understand what are the meanings of the attribute handle, Client Characteristic Configuration Descriptor handle, and value handle. How can I change them? Why do they need to be equal in order to establish connection and send messages?

Thanks!

RE: BLE connection with NRF toolbox

Roei — Mon, 03 Feb 2020 14:49:37 GMT

Hi Amanda,

I think my issue is different.

ble_nus event handler executes on_write function when BLE_GATTS_EVT_WRITE event occurs.

When connecting to mobile, the attribute handle of the event does not equal to the handle of the cccd. Therefore - communication doesn't start.

After that - when I try to send messages from my mobile to the device - nothing happens and ble_nus event handler is not called.

I also tried the solution from your suggested post - it didn't help.

Do you have any other ideas?

Thanks!

RE: BLE connection with NRF toolbox

Amanda Hsieh — Mon, 03 Feb 2020 14:33:19 GMT

Hi,

Please see this post to for the usage of BLE_GAP_CONN_SEC_MODE_SET_LESC_ENC_WITH_MITM.

Setting the security_req_t cccd_write_access = SEC_MITM will require MITM and LESC to access the attribute. The security_req_t variable is passed to set_security_req() function to set the attributes security level.

-Amanda H.