[iOS] Experimental BLE Multiperipheral Application SDK 13.0.0

[Muniek]

Hi,

we were testing Experimental BLE Multiperipheral Application, and it works on Android, but only 2 iOS devices can discover services and characteristics (4 can connect).

e.g. -connect 2 iOS devices first and then 2 more android devices - works.

-connect 2 Android devices first and then iOS device cannot discover any services. It looks like advertisement interval start to variety with amount of connected devices and iOS refuse this devices as a correct.

I know that this is only experimental, but can you tell me anything about this problem and any future solving?

[Hung Bui]

Hi Muniek,

Please try to test with nRF Connect app. I tested here but got no problem connecting 2 Android phone first then connect an IPad to the BLE Multiperipheral Application. Still able to turn off and on the LED.

You may want to record a sniffer trace. Please test with unmodified example.

[UPDATE]It's a bug in our SDK. If you change NRF_BLE_PERIPHERAL_LINK_COUNT to 4 at line 92 in nrf_ble_gatt.h then it should work. I will report it internally.

[Muniek]

If I connect two Android phones first, then iPhone can connect but can't see any services, just white page. (nRF Connect 1.7)? We tried with iPhone 5c, 5s, 6+, 7 and the same situation all the time.

[Hung Bui]

Have you tried with other app ? For example the LightBlue app ? Please provide the sniffer trace.

[Muniek]

Using LighBlue on iPhone 6+ (2 Android phones already connected) I got "Timeout interrogating the peripheral". I attached a sniffer trace during iPhone connect to 'BLE Multiperipheral Application' and try to discover services: Sniffer Trace

[Hung Bui]

@Muniek: Could you please send the full trace with no filter or cut off ? The filter you provide showed nothing except for empty packets. I can't see how the connection is established and terminated.