Cannot discover characteristic

RE: Cannot discover characteristic

run_ar — Mon, 02 May 2016 12:44:27 GMT

Basically you check the header.evt_id like this: switch (p_ble_evt->header.evt_id). The events are then defined in the different headerfiles.
e.g:
BLE_GAP_EVTS in ble_gap.h using the BLE_GAP_EVT_BASE,
BLE_GATTC_EVTS in ble_gattc.h using the BLE_GATTC_EVT_BASE and
BLE_GATTS_EVTS in ble_gatts.h using the BLE_GATTS_EVT_BASE.

RE: Cannot discover characteristic

Ankit — Wed, 27 Apr 2016 07:31:13 GMT

I have another question. Let me describe the whole situation. First of all peripheral starts advertising. -Central starts scanning. -Performs the connection with peripheral. -Central discovers the service and characteristic -enable the notification on the characteristic -As peripheral detects that the notification is enabled by central, it sends the data (e.g. hello). -Central detects the event BLE_GATTC_EVT_HVX in function void client_handling_ble_evt_handler(ble_evt_t * p_ble_evt). -Further parcing the ble_evt_t * p_ble_evt data, i found the testing data (hello string) was here.

p_ble_evt->evt.gattc_evt.params.read_rsp.data.

We can see that there are multiple objects of p_ble_evt, like common_evt, gap_evt, l2cap_evt, gattc_evt, gatts_evt

So my question is, how i come to know that which particular object i need to search for. In simple words, how i can know that for what reason this function is called?

RE: Cannot discover characteristic

Ankit — Wed, 27 Apr 2016 07:23:52 GMT

@shibshab: Yes it is possible

RE: Cannot discover characteristic

Ankit — Wed, 27 Apr 2016 07:23:35 GMT

Thank you for replying. Issue is resolved. Actual problem was at iPhone side. UUID of service and characteristic was causing the problem. UUID of service : E20A39F4-73F5-4BC4-A12F-17D1AD07A961 UUID of characteristic : 08590F7E-DB05-467E-8757-72F6FAEB13D4

after changing the UUID of characteristic to E20A39F5-73F5-4BC4-A12F-17D1AD07A961, everything works fine.

RE: Cannot discover characteristic

shibshab — Wed, 27 Apr 2016 06:07:41 GMT

Is it possible to use iOS as a peripheral? (I'm just curious)

RE: Cannot discover characteristic

run_ar — Mon, 25 Apr 2016 19:32:35 GMT

Are you using a custom UUID? if that is the case you should register this so you can get the UUID type when discovering the service. Can you also try to connect to the iPhone and do a service discovery using the master control panel for pc to check that the services and characteristics is there and that you are trying to discover the right UUID's?