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/BLEClient.h

@@ -15,6 +15,7 @@
 #include <string.h>
 #include <map>
 #include <string>
+#include "BLEExceptions.h"
 #include "BLERemoteService.h"
 #include "BLEService.h"
 #include "BLEAddress.h"
@@ -29,19 +30,28 @@ class BLEClient {
 public:
 	BLEClient();
 	~BLEClient();
-	bool                                       connect(BLEAddress address);
-	void                                       disconnect();
-	BLEAddress                                 getPeerAddress();
-	int                                        getRssi();
-	std::map<std::string, BLERemoteService*>*  getServices();
-	BLERemoteService*                          getService(const char* uuid);
-	BLERemoteService*                          getService(BLEUUID uuid);
+
+	bool                                       connect(BLEAddress address);   // Connect to the remote BLE Server
+	void                                       disconnect();                  // Disconnect from the remote BLE Server
+	BLEAddress                                 getPeerAddress();              // Get the address of the remote BLE Server
+	int                                        getRssi();                     // Get the RSSI of the remote BLE Server
+	std::map<std::string, BLERemoteService*>*  getServices();                 // Get a map of the services offered by the remote BLE Server
+	BLERemoteService*                          getService(const char* uuid);  // Get a reference to a specified service offered by the remote BLE server.
+	BLERemoteService*                          getService(BLEUUID uuid);      // Get a reference to a specified service offered by the remote BLE server.
+	std::string                                getValue(BLEUUID serviceUUID, BLEUUID characteristicUUID);   // Get the value of a given characteristic at a given service.
+
+
 	void                                       handleGAPEvent(
 		                                            esp_gap_ble_cb_event_t  event,
                                                 esp_ble_gap_cb_param_t* param);
-	bool                                       isConnected();
+
+	bool                                       isConnected();                 // Return true if we are connected.
+
 	void                                       setClientCallbacks(BLEClientCallbacks *pClientCallbacks);
-	std::string                                toString();
+	void                                       setValue(BLEUUID serviceUUID, BLEUUID characteristicUUID, std::string value);   // Set the value of a given characteristic at a given service.
+
+	std::string                                toString();                    // Return a string representation of this client.
+
 
 private:
 	friend class BLEDevice;
@@ -56,11 +66,12 @@ private:
 
 	uint16_t                                   getConnId();
 	esp_gatt_if_t                              getGattcIf();
-	BLEAddress    m_peerAddress = BLEAddress((uint8_t*)"\0\0\0\0\0\0");
+	BLEAddress    m_peerAddress = BLEAddress((uint8_t*)"\0\0\0\0\0\0");   // The BD address of the remote server.
 	uint16_t      m_conn_id;
 //	int           m_deviceType;
 	esp_gatt_if_t m_gattc_if;
-	bool          m_isConnected;
+	bool          m_haveServices;    // Have we previously obtain the set of services from the remote server.
+	bool          m_isConnected;     // Are we currently connected.
 
 	BLEClientCallbacks* m_pClientCallbacks;
 	FreeRTOS::Semaphore m_semaphoreRegEvt        = FreeRTOS::Semaphore("RegEvt");
@@ -68,7 +79,8 @@ private:
 	FreeRTOS::Semaphore m_semaphoreSearchCmplEvt = FreeRTOS::Semaphore("SearchCmplEvt");
 	FreeRTOS::Semaphore m_semaphoreRssiCmplEvt   = FreeRTOS::Semaphore("RssiCmplEvt");
 	std::map<std::string, BLERemoteService*> m_servicesMap;
-	bool m_haveServices; // Have we previously obtain the set of services.
+	void clearServices();   // Clear any existing services.
+
 }; // class BLEDevice
 
 
@@ -79,6 +91,7 @@ class BLEClientCallbacks {
 public:
 	virtual ~BLEClientCallbacks() {};
 	virtual void onConnect(BLEClient *pClient) = 0;
+	virtual void onDisconnect(BLEClient *pClient) = 0;
 };
 
 #endif // CONFIG_BT_ENABLED