ble_peripheral connect to another ble_central?

[king]

Hi, When i read the ble_peripheral sample of the SDK, i have a question below. If my peripheral is connecting a central, then i use function sd_ble_gap_disconnect() to disconnect from that central; And i use function ble_advertising_start() restart the adversting, what should i do to connect another central not the central i have disconnected before? Thanks ~

[shibshab]

You can use directed advertisement (if you know the address of the central you want to connect to), or you can check the peer address of the CONNECTED event, and disconnect if it matches the one from the previous commit. Note that you will still get connected in this case, so you have to close the link by calling the disconnect function.

[run_ar]

What central are you working with? The advertisement packet is visible to all centrals, so there isn't really anything you can do to avoid that the other central sends a conncetion request. However if you already know the central you would like to connect to you, you can add this to a whitelist so other centrals will be ignored.

[king]

Thank you~ year, i know the address. Does it mean i assign a value to m_peer_address in ble_adverising.c and then use function ble_advertising_start(BLE_ADV_MODE_DIRECTED)? I haven't find the interface to assign value to m_peer_address, then can i add an interface to ble_adverising.c?

[run_ar]

If you know the address of the central you want to connect to, you can add this to the advertisement whitelist. This way you can ignore connection requests from other centrals.