correct version of BLE libraries

last working version of this library with the ESP32 env revision pointed in the wiki

lib/ESP32_BLE_Arduino/src/BLEScan.cpp

@@ -74,9 +74,6 @@ void BLEScan::handleGAPEvent(
 				// asked to stop.
 				case ESP_GAP_SEARCH_INQ_CMPL_EVT: {
 					m_stopped = true;
-					if (m_scanCompleteCB != nullptr) {
-						m_scanCompleteCB(m_scanResults);
-					}
 					m_semaphoreScanEnd.give();
 					break;
 				} // ESP_GAP_SEARCH_INQ_CMPL_EVT
@@ -189,14 +186,12 @@ void BLEScan::setWindow(uint16_t windowMSecs) {
 /**
  * @brief Start scanning.
  * @param [in] duration The duration in seconds for which to scan.
- * @param [in] scanCompleteCB A function to be called when scanning has completed.
- * @return True if scan started or false if there was an error.
+ * @return N/A.
  */
-bool BLEScan::start(uint32_t duration, void (*scanCompleteCB)(BLEScanResults)) {
+BLEScanResults BLEScan::start(uint32_t duration) {
 	ESP_LOGD(LOG_TAG, ">> start(duration=%d)", duration);
 
 	m_semaphoreScanEnd.take(std::string("start"));
-	m_scanCompleteCB = scanCompleteCB;                  // Save the callback to be invoked when the scan completes.
 
 	m_scanResults.m_vectorAdvertisedDevices.clear();
 
@@ -205,7 +200,7 @@ bool BLEScan::start(uint32_t duration, void (*scanCompleteCB)(BLEScanResults)) {
 	if (errRc != ESP_OK) {
 		ESP_LOGE(LOG_TAG, "esp_ble_gap_set_scan_params: err: %d, text: %s", errRc, GeneralUtils::errorToString(errRc));
 		m_semaphoreScanEnd.give();
-		return false;
+		return m_scanResults;
 	}
 
 	errRc = ::esp_ble_gap_start_scanning(duration);
@@ -213,25 +208,14 @@ bool BLEScan::start(uint32_t duration, void (*scanCompleteCB)(BLEScanResults)) {
 	if (errRc != ESP_OK) {
 		ESP_LOGE(LOG_TAG, "esp_ble_gap_start_scanning: err: %d, text: %s", errRc, GeneralUtils::errorToString(errRc));
 		m_semaphoreScanEnd.give();
-		return false;
+		return m_scanResults;
 	}
 
 	m_stopped = false;
 
+	m_semaphoreScanEnd.wait("start");   // Wait for the semaphore to release.
+
 	ESP_LOGD(LOG_TAG, "<< start()");
-	return true;
-} // start
-
-
-/**
- * @brief Start scanning and block until scanning has been completed.
- * @param [in] duration The duration in seconds for which to scan.
- * @return The BLEScanResults.
- */
-BLEScanResults BLEScan::start(uint32_t duration) {
-	if(start(duration, nullptr)) {
-		m_semaphoreScanEnd.wait("start");   // Wait for the semaphore to release.
-	}
 	return m_scanResults;
 } // start