Increase Service Discovery Speed by Master

[Kosidinma]

Hi, So i'm working on an android app that communicates with two nrf51822 devices on the s110 softdevice by switching between them continuously (connecting one, disconnecting the other and vice versa). My issue is that the service discovery seems to take more time than my desired switching period. Each of the devices have only one custom service as well as the standard Generic Profile and Generic Access services (no battery or DIS services). It worked for switching every 10 seconds but I need to switch every second or so. Is it possible to vastly reduce the discovery time; and if so, please how can this be achieved?? I am testing on a Samsung Galaxy s3 running Android 4.3. Thanks

[Kosidinma]

So all I need to do is change the parameters to your suggested values?? Or is there a way to check if my parameters are updating before discovery?

[Locky]

Connect to a BT Dongle (PCA10001) and use the Master Emulator as a central to connect to your device. The Log will show you when the Connection Parameters update. If its not updated within the Discovery Time, you need to reduce your FIRST_CONN_PARAMS_UPDATE_DELAY and change to the parameters I suggested as yours are way too slow.

[Kosidinma]

Thank you, I'll look into this tomorrow and inform you of the results

[Kosidinma]

Actually, I just tested this on my android phone using the master control panel app. No matter the values I set, logged discovery time was still the same (approximately 1.5s). Also, changing to your suggested values caused unwanted disconnection of the device :(. So I don't think those values affect it greatly.

[Locky]

I meant using the PCA10001 Bluetooth Dongle from Nordic and use the Master Emulator Software on a desktop to test as a Central. Do not use an Android to test, I don't think it has the same logging capability as the Desktop version.

Its bizarre that the connection parameters would cause disconnects as these meet Apple's standards which are more strict than Android.

What is your FIRST_CONN_PARAMS_UPDATE_DELAY set to?