ble_gatts_find_chr() function
Retrieves the pair of attribute handles associated with a local GATT characteristic.
Arguments
svc_uuid
The UUID of the parent service.
chr_uuid
The UUID of the characteristic to look up.
out_def_handle
On success, populated with the handle of the characteristic definition attribute. Pass null if you don't need this value.
out_val_handle
On success, populated with the handle of the characteristic value attribute. Pass null if you don't need this value.
Return value
0 on success; BLE_HS_ENOENT if the specified service or characteristic could not be found.