BLE connection with NRF toolbox

[Roei]

Hi,

I'm using NRF52840, and I've developed a feature which bonds with NRF toolbox application. The problem is that when I'm using secured BLE, I can't receive any messages from my mobile (using NRF toolbox).

I've set pairing mode to NFC_PAIRING_MODE_LESC_OOB, and I use pm_conn_secure() to open a secured connection.

When initializing NUS service, I'm using BLE_GAP_CONN_SEC_MODE_SET_LESC_ENC_WITH_MITM for RX and TX attributes.

However, when I'm using NFC_PAIRING_MODE_JUST_WORKS and BLE_GAP_CONN_SEC_MODE_SET_OPEN, everything is OK.

Should I do something else?

Thanks!!

[Amanda Hsieh]

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.

[Roei]

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!

[Roei]

Problem solved. Thanks!