added some example code

qbluetoothleuart.h

@@ -39,6 +39,70 @@
 /*!
  * \brief The QBluetoothLeUart class can be used to talk to BluetoothLE devices via UART effordlessly.
  * It can be used via C++ and QML.
+ *
+ * C++ example:
+ * \code{.cpp}
+ * #include <qbluetoothleuart.h>
+ * class MyBluetoothLeClass : QObject {
+ * public:
+ *     MyBluetoothLeClass(QObject* parent = nullptr) : QObject(parent) {
+ *         this->ble = new QBluetoothLeUart();
+ *
+ *         connect(this->ble, &QBluetoothLeUart::foundNewDevice, this, &MyBluetoothLeClass::handleFoundNewDevice);
+ *         connect(this->ble, &QBluetoothLeUart::connectedToDevice, this, &MyBluetoothLeClass::handleBluetoothDeviceConected);
+ *         connect(this->ble, &QBluetoothLeUart::dataReceived, this, &MyBluetoothLeClass::handleDataReceived);
+ *
+ *         this->ble->startScanningForDevices();
+ *     }
+ *
+ * private:
+ *     QBluetoothLeUart *ble;
+ *
+ * private slots:
+ *     void handleFoundNewDevice(QBluetoothLeUartDevice* device) {
+ *         qDebug() << "Found a device: name: " << device->getName() << " address: " << device->getAddress();
+ *
+ *         if(device->getName() == "My device name"){
+ *             this->ble->stopScanningForDevices();
+ *             this->ble->connectToDevice(device);
+ *         }
+ *     }
+ *
+ *     void handleBluetoothDeviceConected()  {
+ *         this->ble->sendData("This is my test message");
+ *     }
+ *
+ *     void handleDataReceived(const QString &s) {
+ *         qDebug() << "Data received: " << s;
+ *     }
+ * };
+ * \endcode
+ *
+ * QML example:
+ * \code{.qml}
+ * QBluetoothLeUart {
+ *     id: ble
+ *     Component.onCompleted: {
+ *         ble.startScanningForDevices()
+ *    }
+ *
+ *     onFoundNewDevice: {
+ *         console.log("Found a device: name: " + device.name + " address: " + device.address)
+ *         if(device.name === "ESP32 Chat Test") {
+ *             ble.stopScanningForDevices()
+ *             ble.connectToDevice(device)
+ *        }
+ *     }
+ *
+ *     onConnectedToDevice: {
+ *         ble.sendData("This is my test message")
+ *     }
+ *
+ *     onDataReceived: {
+ *         console.log("Data received: " + data)
+ *     }
+ * }
+ * \endcode
  */
 class QBluetoothLeUart : public QObject
 {
@@ -246,7 +310,7 @@ signals:
 
     void connectedToDevice();
 
-    void dataReceived(QString s);
+    void dataReceived(QString data);
 
 };