Central making connection request without scanning

[John_Doe]

Hi Nordic,

I am using SDK 12.3.0, S130 2.0.1 and PCA10028 nrf51 DK.

I would like to ask if central can make connection request without scanning (central know the mac address of peripheral).

I tried by directly calling sd_ble_gap_connect function with known peripheral mac address. It worked but I do not know if this is a proper procedure.

Would making connection request without scanning cause any issue?

Thanks.

[Jared]

Hi,

This is OK, as long as the peripheral that you try to connect to is advertising. The Softdevice will perform a scanning after the sd_ble_gap_connect() has been called regardless if the application has performed a scanning or not. The sequence chart for a connection establishment is shown here. 

Best regards

Jared