SDK 14 - How to set up a BLE Observer for custom service

RE: SDK 14 - How to set up a BLE Observer for custom service

run_ar — Mon, 09 Apr 2018 08:24:58 GMT

This has a separate thread: devzone.nordicsemi.com/.../nrf52810---sdh-ble-observer-not-getting-notified

RE: SDK 14 - How to set up a BLE Observer for custom service

Ankit Bhatnagar — Wed, 04 Apr 2018 04:03:56 GMT

Hi Bryan, I am also facing an issue with sdk 14 where by ble event observer hangs the system whenever I try to connect to the device. The device is advertising but hangs on connect. Everything else including a 1 second timer also stops which means the observer is getting the connect event but something somewhere hangs.

Since you have already got it to work, any idea what could be happening ?

RE: SDK 14 - How to set up a BLE Observer for custom service

Bryan H — Tue, 15 Aug 2017 15:55:10 GMT

Now I am getting:

../../../our_service.c: In function 'ble_our_service_on_ble_evt':

../../../our_service.c:105:41: error: passing argument 2 of 'on_ble_write' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers]

         on_ble_write(p_our_service, p_ble_evt);

I fixed that by adding const to void on_ble_write...

static void on_ble_write(ble_os_t * p_our_service, ble_evt_t  const * p_ble_evt)

Thank you sooooooo much for your help!

It works perfectly now!!!!

I owe you big time!!!!

RE: SDK 14 - How to set up a BLE Observer for custom service

Nguyen Hoan Hoang — Tue, 15 Aug 2017 15:36:04 GMT

I edited previous comment to add const in the declaration

RE: SDK 14 - How to set up a BLE Observer for custom service

Bryan H — Tue, 15 Aug 2017 14:38:23 GMT

I am now getting an error: ../../../main.c:1733:73: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]

NRF_SDH_BLE_OBSERVER(m_our_service_observer, APP_BLE_OBSERVER_PRIO, ble_our_service_on_ble_evt, (void*)&m_our_service);

It is indicating the error is with : ble_our_service_on_ble_evt

Also says right below that error:

c:\sdk14.0\components\softdevice\common\nrf_sdh_ble.h:89:18: note: in definition of macro 'NRF_SDH_BLE_OBSERVER'

 .handler   = _handler,                                                                          \

              ^

How can I fix that error?

RE: SDK 14 - How to set up a BLE Observer for custom service

Nguyen Hoan Hoang — Mon, 14 Aug 2017 21:04:51 GMT

change your

void ble_our_service_on_ble_evt(ble_os_t * p_our_service, ble_evt_t * p_ble_evt)
{
   ...
}

void ble_our_service_on_ble_evt(ble_evt_t const *p_ble_evt, void *p_context)
{
    ble_os_t * p_our_service = (ble_os_t *)p_context;

    ...
}

RE: SDK 14 - How to set up a BLE Observer for custom service

Bryan H — Mon, 14 Aug 2017 20:45:42 GMT

I can't seem to get it to work with your code above. A ton of errors come up.

This was the code that was in my static void ble_evt_dispatch(ble_evt_t * p_ble_evt) on the previous SDK (that worked):

ble_our_service_on_ble_evt(&m_our_service, p_ble_evt);

This was the working code for void ble_our_service_on_ble_evt(ble_os_t * p_our_service, ble_evt_t * p_ble_evt)

        case BLE_GATTS_EVT_WRITE:
        on_ble_write(p_our_service, p_ble_evt);
        break;
    case BLE_GAP_EVT_CONNECTED:
        p_our_service->conn_handle = p_ble_evt->evt.gap_evt.conn_handle;
        break;
    case BLE_GAP_EVT_DISCONNECTED:
        p_our_service->conn_handle = BLE_CONN_HANDLE_INVALID;
        break;
    default:
        // No implementation needed.
        break;

Any help would be appreciated!

RE: SDK 14 - How to set up a BLE Observer for custom service

Nguyen Hoan Hoang — Mon, 14 Aug 2017 16:45:20 GMT

I started migrating too. Have not fully tested but you can try this.

void ble_our_service_on_ble_evt(ble_evt_t *p_ble_evt, void *p_context)
{
    ble_os_t * our_service = (ble_os_t *)p_context;

    ...
}

// Register a handler for BLE events.
NRF_SDH_BLE_OBSERVER(m_our_service_observer, APP_BLE_OBSERVER_PRIO, ble_our_service_on_ble_evt, (void*)&m_our_service);