socket->connectToService(address, QBluetoothUuid(QBluetoothUuid::SerialPort), QIODevice::ReadWrite);
时间: 2024-05-27 22:12:14 浏览: 14
This line of code establishes a Bluetooth socket connection to a service identified by the given address and UUID. The QIODevice::ReadWrite flag indicates that the socket will be used for bidirectional communication. Specifically, the code uses the QBluetoothUuid::SerialPort identifier to establish a serial port profile connection to the specified Bluetooth device. Once the connection is established, data can be exchanged between the client and the server using the socket.
相关问题
void WBlueTooth::connectToDevice(const QString& deviceAddress) { if (!localDevice->isValid()) { _ui->recv->append("本地蓝牙设备不可用"); return; } QBluetoothAddress address(deviceAddress); QBluetoothDeviceInfo deviceInfo(address); if (!deviceInfo.isValid()) { _ui->recv->append("无效的蓝牙设备地址"); return; } QBluetoothSocket* socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol); socket->connectToService(deviceInfo.address(), QBluetoothUuid(QBluetoothUuid::SerialPort)); connect(socket, &QBluetoothSocket::connected, this, [=]() { _ui->recv->append("已连接到设备:" + deviceInfo.name()); // 连接成功后可以执行其他操作 }); connect(socket, QOverload<QBluetoothSocket::SocketError>::of(&QBluetoothSocket::error), this, [=](QBluetoothSocket::SocketError error) { _ui->recv->append("蓝牙连接错误:" + QString::number(error)); // 处理连接错误的情况 }); }其中这行代码有错QBluetoothDeviceInfo deviceInfo(address);错误类型error: no matching constructor for initialization of 'QBluetoothDeviceInfo'
这个错误是因为在这行代码中,QBluetoothDeviceInfo类没有接受QBluetoothAddress类型参数的构造函数。要实例化QBluetoothDeviceInfo对象,可以使用QBluetoothDeviceDiscoveryAgent类的静态函数来获取设备信息。以下是修正后的代码示例:
```cpp
void WBlueTooth::connectToDevice(const QString& deviceAddress)
{
if (!localDevice->isValid()) {
_ui->recv->append("本地蓝牙设备不可用");
return;
}
QBluetoothAddress address(deviceAddress);
QBluetoothDeviceInfo deviceInfo = QBluetoothDeviceDiscoveryAgent::remoteDevice(address);
if (!deviceInfo.isValid()) {
_ui->recv->append("无效的蓝牙设备地址");
return;
}
QBluetoothSocket* socket = new QBluetoothSocket(QBluetoothServiceInfo::RfcommProtocol);
socket->connectToService(deviceInfo.address(), QBluetoothUuid(QBluetoothUuid::SerialPort));
connect(socket, &QBluetoothSocket::connected, this, [=]() {
_ui->recv->append("已连接到设备:" + deviceInfo.name());
// 连接成功后可以执行其他操作
});
connect(socket, QOverload<QBluetoothSocket::SocketError>::of(&QBluetoothSocket::error), this, [=](QBluetoothSocket::SocketError error) {
_ui->recv->append("蓝牙连接错误:" + QString::number(error));
// 处理连接错误的情况
});
}
```
修正后的代码中使用了`QBluetoothDeviceDiscoveryAgent::remoteDevice`函数来获取设备信息,并将其赋值给`deviceInfo`对象。这样就可以避免了构造函数的错误。
bool WorkThread::openSerialPort(QString port) { this->serialPort = new QSerialPort(); int baudRate = QSerialPort::Baud115200; if(serialPort->isOpen()) { serialPort->close(); } serialPort->setPortName(port); if(!serialPort->open(QIODevice::ReadWrite)) { return false; } serialPort->setBaudRate(baudRate); serialPort->setParity(QSerialPort::NoParity); serialPort->setDataBits(QSerialPort::Data8); serialPort->setStopBits(QSerialPort::OneStop); serialPort->setFlowControl(QSerialPort::NoFlowControl); serialPort->setDataTerminalReady(true); serialPort->setRequestToSend(true); return true; }
这段代码实现了一个函数openSerialPort,作用是打开串口设备并进行设置,其中port是一个字符串,表示要打开的串口名称。具体实现步骤如下:
1. 创建一个串口对象serialPort,其类型为QSerialPort。
2. 设置串口波特率为115200,这里使用了QSerialPort类中的常量Baud115200。
3. 如果串口已经被打开,则先关闭串口。
4. 设置串口名称为port,并尝试打开串口设备。
5. 如果串口打开失败,则返回false,表示打开串口失败。
6. 设置串口的数据位、停止位、校验位、流控制等参数。
7. 将数据终端就绪(DTR)信号和请求发送(RTS)信号设置为true,表示串口已经准备好发送和接收数据。
8. 返回true,表示串口打开成功,并且已经设置好参数。