Adjust range for valid RSSI filter to -127..20

weliem · Dec 30, 2021 · 331b5f4 · 331b5f4
1 parent d9285c9
commit 331b5f4
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Showing 2 changed files with 17 additions and 4 deletions.
diff --git a/blessed/src/main/java/com/welie/blessed/BluetoothCentralManager.java b/blessed/src/main/java/com/welie/blessed/BluetoothCentralManager.java
@@ -373,13 +373,25 @@ public void stopScan() {
         stopScanning();
     }
 
-    public void setRssiThreshold(final short threshold) {
-        if (threshold > 20 || threshold < -200) {
-            throw new IllegalArgumentException("RSSI threshold value outside range (-200 to +20");
+    /**
+     * Set the RSSI threshold while scanning.
+     *
+     * The new value will be used when a new scan is started
+     *
+     * @param threshold must be between -127 and +20
+     */
+    public void setRssiThreshold(final int threshold) {
+        if (threshold > 20 || threshold < -127) {
+            throw new IllegalArgumentException("RSSI threshold value outside range (-127 to +20");
         }
-        this.discoveryRssiThreshold = threshold;
+        this.discoveryRssiThreshold = (short) threshold;
     }
 
+    /**
+     * Get the currently set RSSI threshold for scanning
+     *
+     * @return the current stored RSSI threshold
+     */
     public short getRssiThreshold() {
         return this.discoveryRssiThreshold;
     }

diff --git a/src/main/java/testapp/BluetoothHandler.java b/src/main/java/testapp/BluetoothHandler.java
@@ -251,6 +251,7 @@ public BluetoothHandler() {
         logger.info("initializing BluetoothCentral");
         central = new BluetoothCentralManager(bluetoothCentralManagerCallback, new HashSet<>(Collections.singletonList(SCANOPTION_NO_NULL_NAMES)));
         central.setPinCodeForPeripheral("B0:49:5F:01:20:8F", "635227");
+        central.setRssiThreshold(-120);
         startScanning();
     }