Index: sources/bluetooth/BluetoothInterface.h
===================================================================
diff -u -rc447018bc6c50996f402e01f951d40b17a120705 -r1c97eebc80b33b429fa6e9489584ce3bf24f0bbc
--- sources/bluetooth/BluetoothInterface.h	(.../BluetoothInterface.h)	(revision c447018bc6c50996f402e01f951d40b17a120705)
+++ sources/bluetooth/BluetoothInterface.h	(.../BluetoothInterface.h)	(revision 1c97eebc80b33b429fa6e9489584ce3bf24f0bbc)
@@ -60,8 +60,14 @@
 
     bool        _isValid    = false  ;
 
-    const QByteArray                _bloodPressureNotifyValue   = QByteArray::fromHex("0100");
-    const char                     *_invalidLocalAddress        = "00:00:00:00:00:00";
+    const QByteArray               _bloodPressureNotifyValue               = QByteArray::fromHex("0100");
+    const QString                  _devicePairingBondCharacteristicUuid    = "{b305b680-aee7-11e1-a730-0002a5d5c51b}";
+    const QString                  _vendorSpecificServiceUuid              = "{ecbe3980-c9a2-11e1-b1bd-0002a5d5c51b}";
+    const char                     *_invalidLocalAddress                   = "00:00:00:00:00:00";
+    const char                     _deviceConfirmKeyWriteCodeSuccess       = '\x82';
+    const char                     *_devicePairingKeyString                = "0x00EE020E";
+    const char                     *_enableKeyProgrammingString            = "0x200000000000000000000000000000000";
+
     QStringList                     _supportedDeviceKeywords     { "BP7000", "BLEsmart", "BLESmart" }; // Regarding to Omron Documents.
     QBluetoothLocalDevice          *_local                      = nullptr   ;
     QBluetoothDeviceDiscoveryAgent *_agent                      = nullptr   ;
@@ -71,6 +77,7 @@
     QLowEnergyService              *_serviceCurrentTime         = nullptr   ;
     QLowEnergyService              *_serviceBloodPressure       = nullptr   ;
     QLowEnergyService              *_serviceBattery             = nullptr   ;
+    QLowEnergyService              *_serviceVendorSpecific      = nullptr   ;
 
     QBluetoothDeviceInfo            _temp                                   ;
     quint8                          _tempBatt                   = 0         ;
@@ -79,6 +86,8 @@
     bool                            _reconnectionActive         = false     ;
     const quint16                   _interval                   = 1000      ; // the interface timer base interval in mSec
 
+    bool _isPairingKeyWritten       = false; // indicate whether the pairing/bond key is written to the device
+
 public:
     bool isValid(           ) const { return _isValid  ; }
     void   valid(bool vValid)       { _isValid = vValid; }
@@ -169,8 +178,12 @@
     void interpretBloodPressure (const QByteArray           &vData);
     void interpretInformation   ();
     void interpretBattery       (const QByteArray           &vData);
-    void requestDevicePairing   (const QBluetoothAddress &vAddress);
+    void requestDevicePairing   (const BluetoothDeviceData  &vDevice);
 
+    void enableKeyProgramming();
+    void writeDevicePairingKey();
+    bool isVendorSpecificService           (const QLowEnergyService *service               );
+    bool isDevicePairingCharacteristicUuid (const QLowEnergyCharacteristic &vCharacteristic);
 signals:
     void didStateChange         (const BluetoothData        &vData);
     void didActionReceive       (const UIBloodPressureData  &vData);