Set ESP-IDF to 3.2 (#2662)

* Set IDF to v3.2

* Remove BLE submodule

* Add BLE lib source

* Update Camera example to support OV3660

libraries/BLE/src/BLESecurity.h

@@ -0,0 +1,72 @@
+/*
+ * BLESecurity.h
+ *
+ *  Created on: Dec 17, 2017
+ *      Author: chegewara
+ */
+
+#ifndef COMPONENTS_CPP_UTILS_BLESECURITY_H_
+#define COMPONENTS_CPP_UTILS_BLESECURITY_H_
+#include "sdkconfig.h"
+#if defined(CONFIG_BT_ENABLED)
+
+#include <esp_gap_ble_api.h>
+
+class BLESecurity {
+public:
+	BLESecurity();
+	virtual ~BLESecurity();
+	void setAuthenticationMode(esp_ble_auth_req_t auth_req);
+	void setCapability(esp_ble_io_cap_t iocap);
+	void setInitEncryptionKey(uint8_t init_key);
+	void setRespEncryptionKey(uint8_t resp_key);
+	void setKeySize(uint8_t key_size = 16);
+	static char* esp_key_type_to_str(esp_ble_key_type_t key_type);
+
+private:
+	esp_ble_auth_req_t m_authReq;
+	esp_ble_io_cap_t m_iocap;
+	uint8_t m_initKey;
+	uint8_t m_respKey;
+	uint8_t m_keySize;
+
+}; // BLESecurity
+
+
+/*
+ * @brief Callbacks to handle GAP events related to authorization
+ */
+class BLESecurityCallbacks {
+public:
+	virtual ~BLESecurityCallbacks() {};
+
+	/**
+	 * @brief Its request from peer device to input authentication pin code displayed on peer device.
+	 * It requires that our device is capable to input 6-digits code by end user
+	 * @return Return 6-digits integer value from input device
+	 */
+	virtual uint32_t onPassKeyRequest() = 0;
+
+	/**
+	 * @brief Provide us 6-digits code to perform authentication.
+	 * It requires that our device is capable to display this code to end user
+	 * @param
+	 */
+	virtual void onPassKeyNotify(uint32_t pass_key) = 0;
+
+	/**
+	 * @brief Here we can make decision if we want to let negotiate authorization with peer device or not
+	 * return Return true if we accept this peer device request
+	 */
+
+	virtual bool onSecurityRequest() = 0 ;
+	/**
+	 * Provide us information when authentication process is completed
+	 */
+	virtual void onAuthenticationComplete(esp_ble_auth_cmpl_t) = 0;
+
+	virtual bool onConfirmPIN(uint32_t pin) = 0;
+}; // BLESecurityCallbacks
+
+#endif // CONFIG_BT_ENABLED
+#endif // COMPONENTS_CPP_UTILS_BLESECURITY_H_