Improv - BLE WiFi provisioning (#1807)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

esphome/components/esp32_ble/ble_advertising.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <vector>
+
+#ifdef ARDUINO_ARCH_ESP32
+
+#include <esp_gap_ble_api.h>
+#include <esp_gatts_api.h>
+
+namespace esphome {
+namespace esp32_ble {
+
+class ESPBTUUID;
+
+class BLEAdvertising {
+ public:
+  BLEAdvertising();
+
+  void add_service_uuid(ESPBTUUID uuid);
+  void set_scan_response(bool scan_response) { this->scan_response_ = scan_response; }
+  void set_min_preferred_interval(uint16_t interval) { this->advertising_data_.min_interval = interval; }
+
+  void start();
+  void stop();
+
+ protected:
+  bool scan_response_;
+  esp_ble_adv_data_t advertising_data_;
+  esp_ble_adv_data_t scan_response_data_;
+  esp_ble_adv_params_t advertising_params_;
+  std::vector<ESPBTUUID> advertising_uuids_;
+};
+
+}  // namespace esp32_ble
+}  // namespace esphome
+
+#endif