Python+PyQt5实现串口数据采集和显示

from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton, QMessageBox
from PyQt5.QtCore import QThread, pyqtSignal
import serial
import sys
 
class SerialThread(QThread):
    data_signal = pyqtSignal(str)  # 定义一个信号，用于发送串口数据
 
    def __init__(self, port, baudrate, parent=None):
        super(SerialThread, self).__init__(parent)
        self.port = port
        self.baudrate = baudrate
        self.is_running = True
 
    def run(self):
        try:
            ser = serial.Serial(port=self.port, baudrate=self.baudrate, timeout=1)
            while self.is_running:
                if ser.in_waiting:
                    data = ser.readline().decode('utf-8').strip()
                    self.data_signal.emit(data)  # 当有数据时，发射信号
        except Exception as e:
            QMessageBox.critical(None, 'Error', str(e))
        finally:
            ser.close()
 
    def stop(self):
        self.is_running = False
        self.terminate()
 
class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.serial_thread = SerialThread('COM3', 9600)
        self.init_ui()
        self.serial_thread.data_signal.connect(self.on_data_received)  # 连接信号槽
 
    def init_ui(self):
        self.setWindowTitle('串口数据采集')
        self.button_start = QPushButton('开始')
        self.button_start.clicked.connect(self.on_button_start_clicked)
        self.button_stop = QPushButton('停止')
        self.button_stop.clicked.connect(self.on_button_stop_clicked)
        layout = QVBoxLayout()
        layout.addWidget(self.button_start)
        layout.addWidget(self.button_stop)
        central_widget = QWidget()
        central_widget.setLayout(layout)
        self.setCentralWidget(central_widget)
 
    def on_button_start_clicked(self):
        if not self.serial_thread.isRunning():
            self.serial_thread.start()
            self.button_start.setEnabled(False)
            self.button_stop.setEnabled(True)
 
    def on_button_stop_clicked(self):
        self.button_start.setEnabled(True)
        self.button_stop.setEnabled(False)
        self.serial_thread.stop()
 
    def on_data_received(self, data):
        print(data)  # 在这里处理接收到的数据
 
if __name__ == '__main__':
    app = QApplic