Problems getting service discovery to work on SDK 15 with db_discovery module

[Andy]

Hi,

I'm trying to do service discovery on a peripheral but I'm not getting any events back. I'll explain shortly what I'm doing and maybe you could tell me if I missed anything.

• Initializing db_discovery module (ble_db_discovery_init(db_disc_handler);)
• Passing BLE events over to the discovery module (ble_db_discovery_on_ble_evt)
• Register to discover a UUID (ble_db_discovery_evt_register)
• Listen to the events raised in the discovery callback

By doing that I get the following debug output and nothing more:

ble_db_disc         : Starting discovery of service with UUID 0x9BE5 on connection handle 0x0

Do you have any idea what could I be doing wrong? I put some debug output directly on the callback to print out the discovery events, but I'm not getting any at all.

[Hung Bui]

Hi Andy, 

It seems to be correct, have you tried to add a breakpoint in the db_discovery module and check if BLE_GATTC_EVT_PRIM_SRVC_DISC_RSP event returns ? Make sure you enable BLE_DB_DISCOVERY_ENABLED in sdk_config.h 

Which firmware you have on the peripheral ?

Have you tried to test with the ble_app_uart_c example ? I the example we use the db_discovery. 

[Andy]

Hi Hung,

I figured it out, I wasn't passing the pointer to the discovery_db when forwarding the events.

ble_db_discovery_on_ble_evt(p_ble_evt, NULL);

That was a porting issue from SDK 13 I guess (from my side). Now after I passed the pointer now it works perfectly :)