[BT] - Adaptive scan (#1440)

* [BT] Adaptive scan

Add adaptive scan to avoid users setting parameters and deduct automatically the scan requirements from the list of devices

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Co-authored-by: DigiH <github@digih.net>

main/config_BT.h

@@ -74,12 +74,15 @@ extern int btQueueLengthCount;
 #ifndef BLEScanWindow
 #  define BLEScanWindow 30 // How long to scan during the interval; in milliseconds.
 #endif
-#ifndef ActiveBLEScan
-#  define ActiveBLEScan true // Set active scanning, this will get more data from the advertiser.
+#ifndef AdaptiveBLEScan
+#  define AdaptiveBLEScan true // Sets adaptive scanning, this will automatically decide on the best passive and active scanning intervals
 #endif
 #ifndef TimeBtwActive
 #  define TimeBtwActive 55555 //define default time between two BLE active scans when general passive scanning is selected; in milliseconds
 #endif
+#ifndef MinTimeBtwScan
+#  define MinTimeBtwScan 100 //define the time between two scans; in milliseconds
+#endif
 #ifndef TimeBtwConnect
 #  define TimeBtwConnect 3600000 //define default time between BLE connection attempt (not used for immediate actions); in milliseconds
 #endif
@@ -133,7 +136,7 @@ unsigned long scanCount = 0;
 /*----------------CONFIGURABLE PARAMETERS-----------------*/
 struct BTConfig_s {
   bool bleConnect; // Attempt a BLE connection to sensors with ESP32
-  bool activeScan;
+  bool adaptiveScan;
   unsigned long intervalActiveScan; // Time between 2 active scans when generally passive scanning
   unsigned long BLEinterval; // Time between 2 scans
   unsigned long intervalConnect; // Time between 2 connects