Hi Arman, On Tue, Jun 2, 2015 at 12:42 AM, Arman Uguray <armansito@xxxxxxxxxxxx> wrote: >> Service changed, the lower is your requirement to reconnect the more >> it will be required, but you got to pair to make it persistent across >> reconnections but the first time you connect is always going to be >> time consuming since you got to discover so it does not matter much if >> the first time takes 9.7s to discover all services since the next time >> it would not spend any time doing it again, that is the only reason >> HoG can reconnect very fast. >> >> -- >> Luiz Augusto von Dentz >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in >> the body of a message to majordomo@xxxxxxxxxxxxxxx >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > I'm late to the discussion, but wasn't this kind of functionality the > whole point behind adding the org.bluez.GattProfile1 interface defined > in doc/gatt-api.txt? Can't we do this through that? Yes, that was my suggestion to give a list of UUID of interested so bt_gatt_client instance can skip discovery of characteristics and descriptor not in the list, but it is not so simple when this is dynamic as it is applications may come and go so we would have to cache not only the database but also what was discovered which complicate things. Btw, the spec says the following about the service changed: C1: Mandatory if service definitions on the server can be added, changed or removed; otherwise optional So the following code should be optimized to return without clearing the database if service changed is not supported. if (device->le_state.bonded) return; gatt_db_clear(device->db); device->gatt_cache_used = false; Futhermore Im not sure we need to clear the database like that, we could check if the service range match that probably means the service has not changed since the last connection as is very unlikely that service characteristics and descriptors would change even if the service was removed and added again in the exact same place. -- Luiz Augusto von Dentz -- To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
