pyqt5 QTbluetooth 发送和接收的代码

以下是使用 Pyqt5 中的 QBluetooth 模块进行蓝牙发送和接收的示例代码：

from PyQt5.QtBluetooth import QBluetoothDeviceDiscoveryAgent, QBluetoothSocket
from PyQt5.QtCore import QIODevice, QBluetoothUuid, QByteArray
from PyQt5.QtWidgets import QApplication, QDialog, QListWidget, QVBoxLayout, QPushButton, QHBoxLayout, QLineEdit
import sys


class BluetoothDialog(QDialog):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.devices = QListWidget()

        self.discovery = QBluetoothDeviceDiscoveryAgent()
        self.discovery.deviceDiscovered.connect(self.add_device)

        self.devices.itemDoubleClicked.connect(self.connect_to_device)

        self.connect_button = QPushButton('Connect')
        self.connect_button.clicked.connect(self.connect_to_device)

        self.send_button = QPushButton('Send')
        self.send_button.clicked.connect(self.send_data)

        self.input_box = QLineEdit()

        layout = QVBoxLayout()
        layout.addWidget(self.devices)
        layout.addWidget(self.connect_button)

        hbox = QHBoxLayout()
        hbox.addWidget(self.input_box)
        hbox.addWidget(self.send_button)
        layout.addLayout(hbox)

        self.setLayout(layout)

    def add_device(self, info):
        name = info.name()
        address = info.address().toString()
        self.devices.addItem('{} ({})'.format(name, address))

    def connect_to_device(self):
        device = self.devices.currentItem().text()
        device_name = device.split(' ')[0]
        device_address = device.split(' ')[1][1:-1]

        socket = QBluetoothSocket(QBluetoothServiceInfo.RfcommProtocol)
        socket.connectToService(QBluetoothAddress(device_address), QBluetoothUuid.SerialPort)
        self.socket = socket
        self.socket.readyRead.connect(self.receive_data)

    def send_data(self):
        text = self.input_box.text()
        if not text:
            return

        data = QByteArray()
        data.append(text)

        self.socket.write(data)
        self.input_box.setText('')

    def receive_data(self):
        data = self.socket.readAll()
        print(data)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = BluetoothDialog()
    dialog.discovery.start()
    dialog.show()
    sys.exit(app.exec_())

该示例代码实现了蓝牙设备的搜索、连接、发送和接收功能。在搜索到蓝牙设备后，用户可以通过双击列表中的设备名称来连接设备。连接成功后，用户可以通过文本框输入需要发送的数据，点击 Send 按钮发送数据，并通过 receive_data 方法接收数据。注意，该示例代码只是一个简单的示例，实际应用中需要根据具体需求进行修改。