Fix filter not letting beacons through after the first one

src/main.rs

@@ -1,6 +1,6 @@
 use std::{collections::HashMap, convert::Infallible, sync::Arc, time::{SystemTime, UNIX_EPOCH}};
 
-use bluer::{self, Adapter, AdapterEvent, Address};
+use bluer::{self, Adapter, AdapterEvent, Address, DiscoveryFilter, DiscoveryTransport};
 
 use anyhow::Result;
 use futures::{Stream, StreamExt};
@@ -86,7 +86,7 @@ async fn main() -> Result<()> {
             sniffer_store.lock().await.insert(data, SystemTime::now());
         }
     });
-    
+
     let filter =
                  warp::path!("metrics")
                     .map(move || Arc::clone(&store))
@@ -108,6 +108,13 @@ async fn extract(adapter: Arc<Adapter>, evt: AdapterEvent) -> Option<Data> {
 }
 
 async fn sensor_reports<'a>(adapter: Arc<Adapter>) -> Result<impl Stream<Item=Data> + 'a> {
+    let filter = DiscoveryFilter {
+        transport: DiscoveryTransport::Le,
+        duplicate_data: true,
+        ..Default::default() };
+
+    adapter.set_discovery_filter(filter).await?;
+
     Ok(adapter.discover_devices_with_changes().await?
         .filter_map(move |evt| { extract(Arc::clone(&adapter), evt) }))
 }