Hi,
I am currently trying to implement a beacon scanner alongside peripheral mode BLE on an nRF52832. As I am only scanning for beacons, I was hoping I would not need to include any code other than "nrf_ble_scan.c" and ignore the rest of the central libraries.
My code is working well, expect the filters aren't firing, even though there is definitely a match. I tested this by setting my beacon UUID to that of the NUS service and ran the "ble_nus_c" example before running my custom code. The "ble_nus_c" worked well with my beacon and correctly gave me an NRF_BLE_SCAN_EVT_FILTER_MATCH event. However, in my custom code, this event never fires. I am initialising the scanning module in exactly the same way as the example. Code Below:
static ble_uuid_t const m_beacon_uuid = { .uuid = 0x0001, .type = BLE_UUID_TYPE_VENDOR_BEGIN };
NRF_BLE_SCAN_DEF( m_scan );
static void scan_evt_handler( scan_evt_t const* p_scan_evt )
{
ret_code_t err_code;
switch( p_scan_evt->scan_evt_id )
{
case NRF_BLE_SCAN_EVT_SCAN_TIMEOUT:
{
NRF_LOG_INFO( "Scan timed out." );
scan_start( );
}
break;
case NRF_BLE_SCAN_EVT_FILTER_MATCH:
{
NRF_LOG_INFO( "Filter Match" );
} break;
case NRF_BLE_SCAN_EVT_NOT_FOUND:
{
NRF_LOG_INFO( "%02X, %02X, %02X, %02X, %02X, %02X",
p_scan_evt->params.p_not_found->peer_addr.addr[0],
p_scan_evt->params.p_not_found->peer_addr.addr[1],
p_scan_evt->params.p_not_found->peer_addr.addr[2],
p_scan_evt->params.p_not_found->peer_addr.addr[3],
p_scan_evt->params.p_not_found->peer_addr.addr[4],
p_scan_evt->params.p_not_found->peer_addr.addr[5] );
}break;
default:
break;
}
}
static void scan_init( void )
{
ret_code_t err_code;
nrf_ble_scan_init_t init_scan;
memset( &init_scan, 0, sizeof( init_scan ) );
init_scan.connect_if_match = false;
err_code = nrf_ble_scan_init( &m_scan, &init_scan, scan_evt_handler );
APP_ERROR_CHECK( err_code );
err_code = nrf_ble_scan_filter_set( &m_scan, SCAN_UUID_FILTER, &m_beacon_uuid );
APP_ERROR_CHECK( err_code );
err_code = nrf_ble_scan_filters_enable( &m_scan, NRF_BLE_SCAN_UUID_FILTER, false );
APP_ERROR_CHECK( err_code );
}
static void scan_start( void )
{
ret_code_t ret;
ret = nrf_ble_scan_start( &m_scan );
APP_ERROR_CHECK( ret );
}
Does the "nrf_ble_scan" module also require "db_discovery" or similar to be initialised in order to allow these filters to work?
Thanks!
EDIT: To clarify, the scanning module correctly starts scanning, and using the NRF_LOG_INFO() in the BLE_SCAN_EVT_NOT_FOUND event I can see my central is scanning and finding devices, including the one that should cause a filter match, but the filter is never returning as true
