Hi,
I have a bluetooth central app which connects to several BLE peripherals and am now working on fixing various connection reliability issues.
White lists and bonding are bring used and I am forcing connection loss via use of faraday bags.
I have questions related to connection management.
1) Use of bt_conn_le_create() verses bt_conn_le_create_auto() ?
On my initial scan of peripherals, I make my initial connection to the peripheral using bt_conn_le_create(); security level is set to L2 and the device is added to the whitelist.
On disconnects I call bt_conn_le_create_auto() to listen for whitelisted devices so they can reconnect.
Is a better schema to just do the scans, and add my peripheral devices to the white list. Then use bt_conn_le_create_auto() to connect to the white listed devices. When any peripheral is disconnected (callback); then call bt_conn_le_create_auto() to listen for the peripheral reconnecting?
Also Is it only necessary to set the security level to L2 on that initial connection; or must this be done on seeing each reconnection?
A similar question with regards to service discovery; must I only do this on the inital make of connection; or must this be done on each reconnection?
2) Use of bt_conn_ref() and bt_conn_unref() ?
Should bt_conn_unref() only be used when I am no-longer interested in a connection. IE seeing a deliberate disconnection? or should this be done for every disconnection I see even these environmental ones; where I hope to see the device reconnect?
KInd Regards,
Owain
