Qt 5.11 | Qt Bluetooth | Bluetooth Low Energy Scanner Example | characteristicinfo.cpp Example File

Qt 5.11.3 Reference Documentation

# characteristicinfo.cpp Example File

lowenergyscanner/characteristicinfo.cpp

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      #include "characteristicinfo.h"
      #include "qbluetoothuuid.h"
      #include <QByteArray>

      CharacteristicInfo::CharacteristicInfo()
      {
      }

      CharacteristicInfo::CharacteristicInfo(const QLowEnergyCharacteristic &characteristic):
          m_characteristic(characteristic)
      {
      }

      void CharacteristicInfo::setCharacteristic(const QLowEnergyCharacteristic &characteristic)
      {
          m_characteristic = characteristic;
          emit characteristicChanged();
      }

      QString CharacteristicInfo::getName() const
      {
          QString name = m_characteristic.name();
          if (!name.isEmpty())
              return name;

          // find descriptor with CharacteristicUserDescription
          foreach (const QLowEnergyDescriptor &descriptor, m_characteristic.descriptors()) {
              if (descriptor.type() == QBluetoothUuid::CharacteristicUserDescription) {
                  name = descriptor.value();
                  break;
              }
          }

          if (name.isEmpty())
              name = "Unknown";

          return name;
      }

      QString CharacteristicInfo::getUuid() const
      {
          const QBluetoothUuid uuid = m_characteristic.uuid();
          bool success = false;
          quint16 result16 = uuid.toUInt16(&success);
          if (success)
              return QStringLiteral("0x") + QString::number(result16, 16);

          quint32 result32 = uuid.toUInt32(&success);
          if (success)
              return QStringLiteral("0x") + QString::number(result32, 16);

          return uuid.toString().remove(QLatin1Char('{')).remove(QLatin1Char('}'));
      }

      QString CharacteristicInfo::getValue() const
      {
          // Show raw string first and hex value below
          QByteArray a = m_characteristic.value();
          QString result;
          if (a.isEmpty()) {
              result = QStringLiteral("<none>");
              return result;
          }

          result = a;
          result += QLatin1Char('\n');
          result += a.toHex();

          return result;
      }

      QString CharacteristicInfo::getHandle() const
      {
          return QStringLiteral("0x") + QString::number(m_characteristic.handle(), 16);
      }

      QString CharacteristicInfo::getPermission() const
      {
          QString properties = "( ";
          int permission = m_characteristic.properties();
          if (permission & QLowEnergyCharacteristic::Read)
              properties += QStringLiteral(" Read");
          if (permission & QLowEnergyCharacteristic::Write)
              properties += QStringLiteral(" Write");
          if (permission & QLowEnergyCharacteristic::Notify)
              properties += QStringLiteral(" Notify");
          if (permission & QLowEnergyCharacteristic::Indicate)
              properties += QStringLiteral(" Indicate");
          if (permission & QLowEnergyCharacteristic::ExtendedProperty)
              properties += QStringLiteral(" ExtendedProperty");
          if (permission & QLowEnergyCharacteristic::Broadcasting)
              properties += QStringLiteral(" Broadcast");
          if (permission & QLowEnergyCharacteristic::WriteNoResponse)
              properties += QStringLiteral(" WriteNoResp");
          if (permission & QLowEnergyCharacteristic::WriteSigned)
              properties += QStringLiteral(" WriteSigned");
          properties += " )";
          return properties;
      }

      QLowEnergyCharacteristic CharacteristicInfo::getCharacteristic() const
      {
          return m_characteristic;
      }