update BLE library for ESP32 env compatibility

with the last version of ESP32 arduino env it is not possible to compile on ESP32, we get "missing gatt_api.h" ERROR. So as to avoid that we need to use the last version of the nkolban library for BLE 0.4.16

lib/ESP32_BLE_Arduino/src/BLERemoteService.h

@@ -30,15 +30,17 @@ public:
 	virtual ~BLERemoteService();
 
 	// Public methods
-	BLERemoteCharacteristic* getCharacteristic(const char* uuid);	
-	BLERemoteCharacteristic* getCharacteristic(BLEUUID uuid);
-	BLERemoteCharacteristic* getCharacteristic(uint16_t uuid);
-	std::map<BLERemoteCharacteristic*, std::string>* getCharacteristics();
-	void getCharacteristics(std::map<uint16_t, BLERemoteCharacteristic*>* ptr);
+	BLERemoteCharacteristic* getCharacteristic(const char* uuid);	  // Get the specified characteristic reference.
+	BLERemoteCharacteristic* getCharacteristic(BLEUUID uuid);       // Get the specified characteristic reference.
+	BLERemoteCharacteristic* getCharacteristic(uint16_t uuid);      // Get the specified characteristic reference.
+	std::map<std::string, BLERemoteCharacteristic*>* getCharacteristics();
+	void getCharacteristics(std::map<uint16_t, BLERemoteCharacteristic*>* pCharacteristicMap);  // Get the characteristics map.
 
-	BLEClient*               getClient(void);
-	uint16_t                 getHandle();
-	BLEUUID                  getUUID(void);
+	BLEClient*               getClient(void);                                           // Get a reference to the client associated with this service.
+	uint16_t                 getHandle();                                               // Get the handle of this service.
+	BLEUUID                  getUUID(void);                                             // Get the UUID of this service.
+	std::string              getValue(BLEUUID characteristicUuid);                      // Get the value of a characteristic.
+	void                     setValue(BLEUUID characteristicUuid, std::string value);   // Set the value of a characteristic.
 	std::string              toString(void);
 
 private:
@@ -50,20 +52,23 @@ private:
 	friend class BLERemoteCharacteristic;
 
 	// Private methods
-	void                retrieveCharacteristics(void);
+	void                retrieveCharacteristics(void);   // Retrieve the characteristics from the BLE Server.
 	esp_gatt_id_t*      getSrvcId(void);
-	uint16_t            getStartHandle();
-	uint16_t            getEndHandle();
+	uint16_t            getStartHandle();                // Get the start handle for this service.
+	uint16_t            getEndHandle();                  // Get the end handle for this service.
+
 	void                gattClientEventHandler(
 		esp_gattc_cb_event_t      event,
 		esp_gatt_if_t             gattc_if,
 		esp_ble_gattc_cb_param_t* evtParam);
+
 	void                removeCharacteristics();
 
 	// Properties
 
 	// We maintain a map of characteristics owned by this service keyed by a string representation of the UUID.
-	std::map<BLERemoteCharacteristic *, std::string> m_characteristicMap;
+	std::map<std::string, BLERemoteCharacteristic *> m_characteristicMap;
+
 	// We maintain a map of characteristics owned by this service keyed by a handle.
 	std::map<uint16_t, BLERemoteCharacteristic *> m_characteristicMapByHandle;
 
@@ -71,9 +76,9 @@ private:
 	BLEClient*          m_pClient;
 	FreeRTOS::Semaphore m_semaphoreGetCharEvt = FreeRTOS::Semaphore("GetCharEvt");
 	esp_gatt_id_t       m_srvcId;
-	BLEUUID             m_uuid;
-	uint16_t            m_startHandle;
-	uint16_t            m_endHandle;
+	BLEUUID             m_uuid;             // The UUID of this service.
+	uint16_t            m_startHandle;      // The starting handle of this service.
+	uint16_t            m_endHandle;        // The ending handle of this service.
 }; // BLERemoteService
 
 #endif /* CONFIG_BT_ENABLED */