diff --git a/main/ZgatewayBT.ino b/main/ZgatewayBT.ino
index 9d4eb09..b76f499 100644
--- a/main/ZgatewayBT.ino
+++ b/main/ZgatewayBT.ino
@@ -633,6 +633,7 @@ class MyAdvertisedDeviceCallbacks : public BLEAdvertisedDeviceCallbacks {
 void BLEscan() {
   disableCore0WDT();
   Log.notice(F("Scan begin" CR));
+  BLEDevice::setScanDuplicateCacheSize(BLEScanDuplicateCacheSize);
   BLEDevice::init("");
   BLEScan* pBLEScan = BLEDevice::getScan();
   MyAdvertisedDeviceCallbacks myCallbacks;
diff --git a/main/config_BT.h b/main/config_BT.h
index 0c7df76..9a25bdf 100644
--- a/main/config_BT.h
+++ b/main/config_BT.h
@@ -62,6 +62,9 @@ bool bleConnect = AttemptBLECOnnect;
 #ifndef ScanBeforeConnect
 #  define ScanBeforeConnect 10 //define number of scans before connecting to BLE devices (ESP32 only, minimum 1)
 #endif
+#ifndef BLEScanDuplicateCacheSize
+#  define BLEScanDuplicateCacheSize 200
+#endif
 #ifndef TimeBtwRead
 #  define TimeBtwRead 55555 //define default time between 2 scans
 #endif