bluetooth infinite scan

src/blecsan.cpp

@@ -100,7 +100,7 @@ static void gap_callback_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_pa
 	{
 		case ESP_GAP_BLE_SCAN_PARAM_SET_COMPLETE_EVT:
 			// restart scan
-			status = esp_ble_gap_start_scanning(cfg.blescantime); 
+			status = esp_ble_gap_start_scanning(BLESCANTIME); 
 			if (status != ESP_OK) 
 			{
 				ESP_LOGE(TAG, "esp_ble_gap_start_scanning: rc=%d", status);
@@ -111,7 +111,7 @@ static void gap_callback_handler(esp_gap_ble_cb_event_t event, esp_ble_gap_cb_pa
 			// evaluate scan results	
 			if ( p->scan_rst.search_evt == ESP_GAP_SEARCH_INQ_CMPL_EVT) // Inquiry complete, scan is done
 			{	// restart scan
-				status = esp_ble_gap_start_scanning	(cfg.blescantime); 
+				status = esp_ble_gap_start_scanning	(BLESCANTIME); 
 				if (status != ESP_OK) 
 				{
 					ESP_LOGE(TAG, "esp_ble_gap_start_scanning: rc=%d", status);
@@ -207,7 +207,7 @@ esp_err_t register_ble_functionality(void)
 		#else
 			.scan_filter_policy     = BLE_SCAN_FILTER_ALLOW_ALL,
 		#endif
-		.scan_interval          = (uint16_t) (BLESCANINTERVAL / 0.625),		// Time = N * 0.625 msec
+		.scan_interval          = (uint16_t) (cfg.blescantime * 10 / 0.625), // Time = N * 0.625 msec
 		.scan_window            = (uint16_t) (BLESCANWINDOW / 0.625)		// Time = N * 0.625 msec	
 	};
 

src/configmanager.cpp

@@ -27,7 +27,7 @@ void defaultConfig() {
     cfg.rssilimit     = 0;              // threshold for rssilimiter, negative value!
     cfg.sendcycle     = SEND_SECS;      // payload send cycle [seconds/2]
     cfg.wifichancycle = WIFI_CHANNEL_SWITCH_INTERVAL; // wifi channel switch cycle [seconds/100]
-    cfg.blescantime   = BLESCANTIME;    // BLE scan cycle duration [seconds]
+    cfg.blescantime   = BLESCANINTERVAL / 10;         // BT channel scan cycle duration [seconds/100], default 1 (= 10ms)
     cfg.blescan       = 1;              // 0=disabled, 1=enabled
     cfg.wifiant       = 0;              // 0=internal, 1=external (for LoPy/LoPy4)
     cfg.vendorfilter  = 1;              // 0=disabled, 1=enabled

src/main.h

@@ -1,6 +1,6 @@
 
 // program version - note: increment version after modifications to configData_t struct!!
-#define PROGVERSION                     "1.3.42"    // use max 10 chars here!
+#define PROGVERSION                     "1.3.5"    // use max 10 chars here!
 #define PROGNAME                        "PAXCNT"
 
 //--- Declarations ---

src/paxcounter.conf

@@ -11,18 +11,18 @@
 
 // BLE scan parameters
 #define BLESTACKSIZE                    8192    // stack size for esp_bt_controller
-#define BLESCANTIME                     11      // [seconds] scan duration, see note below
+#define BLESCANTIME                     0       // [seconds] scan duration, 0 means infinite [default], see note below
 #define BLESCANWINDOW                   10      // [milliseconds] scan window, see below, 3 .. 10240, default 10
 #define BLESCANINTERVAL                 10      // [milliseconds] how long to wait between scans, 3 .. 10240, default 10
 
 /* Note: guide for setting bluetooth parameters
 *
-* |< Scan Window >       |< Scan Window >       |< Scan Window >       |
-* |<    Scan Interval   >|<    Scan Interval   >|<    Scan Interval   >|
-* |<                   Scan duration                                  >|
+* |< Scan Window >       |< Scan Window >       | ... |< Scan Window >       |
+* |<    Scan Interval   >|<    Scan Interval   >| ... |<    Scan Interval   >|
+* |<                   Scan duration                                        >|
 * 
-* Scan duration sets how long scanning should be going on, interrupting a wifi scan cycle.
-* Scan window sets how much of the interval should be occupied by scanning.
+* Scan duration sets how long scanning should be going on, before starting a new scan cycle. 0 means infinite (default).
+* Scan window sets how much of the interval should be occupied by scanning. Should be >= BLESCANINTERVAL.
 * Scan interval is how long scanning should be done on each channel. BLE uses 3 channels for advertising.
 * -> Adjust these values with power consumption in mind if power is limited.
 */

src/rcommand.cpp

@@ -9,6 +9,12 @@
 #include <lmic.h>
 #include <hal/hal.h>
 
+// Bluetooth specific includes
+#ifdef BLECOUNTER
+    #include <esp_gap_ble_api.h>                // needed for switching interval parameter by rcommand
+    esp_err_t register_ble_functionality(void); // defined in blescan.cpp
+#endif
+
 // Local logging tag
 static const char *TAG = "rcommand";
 
@@ -92,6 +98,25 @@ void set_wifichancycle(uint8_t val) {
 void set_blescantime(uint8_t val) {
     cfg.blescantime = val;
     ESP_LOGI(TAG, "Remote command: set BLE scan time to %d seconds", cfg.blescantime);
+    #ifdef BLECOUNTER
+
+        // stop scan
+        ESP_LOGI(TAG, "Stopping BLE scan");
+		if (esp_ble_gap_stop_scanning() != ESP_OK) 
+			ESP_LOGE(TAG, "Stopping BLE scan failed");
+		
+        // modify parameters
+        ESP_LOGI(TAG, "Re-register BLE functionality");
+        if (register_ble_functionality() != ESP_OK)
+            ESP_LOGE(TAG, "Re-register BLE functionality failed");
+
+        // restart scan
+        ESP_LOGI(TAG, "Restarting BLE scan");
+		if (esp_ble_gap_start_scanning(BLESCANTIME) != ESP_OK) 
+			ESP_LOGE(TAG, "Restarting BLE scan failed");
+		
+
+    #endif
 };
 
 void set_countmode(uint8_t val) {