How can the Peripheral connect with Central only by using directed Broadcast

[Xphiting]

Hi

I'm using SKD16.0.0 and S132, and I want to realize that peripherals can only connect to a center with a known MAC address through directed advertising.How should I implement this?

• Where the central MAC address is known. 
• The peripheral address is unknown.
• Use directed advertising directly
• No pairing or binding is required.

Best regards

Xft

[Xphiting]

Hi

I have configured the peripheral to broadcast directionally. How do I configure scanning in the central?

Thank you.

[Hung Bui]

Hi Xft, 

I'm sorry for late response. 

You can just do scanning normally. Directed advertising packet is similar to normal connectable advertising packet with only 1 bit difference and the interval is shorter. Have look here: https://devzone.nordicsemi.com/f/nordic-q-a/41407/nrf51-scan-for-directed-advertising

[Xphiting]

Hi  Hung Bui

As shown in my sniffer, directed advertising has already begun.

Advertising Address and Initator Address are both correct.

But, no connection was established while using a normal scan on the central via using the NRF_BLE_SCAN_ADDR_FILTER.

[Hung Bui]

Could post the code where you do scanning and connecting ? 

Please try testing by doing this : 

1. Just do normal advertising and check if your scanning parameter works. Meaning you can scan for the advertising packet when the advertising in normal advertising mode. 

2. Just do only scanning, not connecting, and check which advertising packets you receive. 

There is a chance that the address you input into the scan parameter was not correct (wrong endianess for example)

[Xphiting]

Thank you very much for your time and reply.

I have found the direcetd advertising packet in the BLE_GAP_EVT_ADV_REPORT and have established the connection.

Thank you again.