filter out RSSI readings of 127

AltBeacon · May 14, 2015 · fbfe4bb · fbfe4bb
1 parent 8e18923
commit fbfe4bb
Showing 1 changed file with 7 additions and 3 deletions.
diff --git a/src/main/java/org/altbeacon/beacon/service/RangedBeacon.java b/src/main/java/org/altbeacon/beacon/service/RangedBeacon.java
@@ -62,9 +62,13 @@ public void commitMeasurements() {
     }
 
     public void addMeasurement(Integer rssi) {
-        mTracked = true;
-        lastTrackedTimeMillis = System.currentTimeMillis();
-        filter.addMeasurement(rssi);
+        // Filter out unreasonable values per
+        // http://stackoverflow.com/questions/30118991/rssi-returned-by-altbeacon-library-127-messes-up-distance
+        if (rssi != 127) {
+            mTracked = true;
+            lastTrackedTimeMillis = System.currentTimeMillis();
+            filter.addMeasurement(rssi);
+        }
     }
 
     //kept here for backward compatibility