# -*- coding: utf-8 -*-

import sys

from PyQt5.QtWidgets import *

from PyQt5.QtSerialPort import QSerialPort, QSerialPortInfo

from PyQt5.QtCore import pyqtSignal, QThread, QObject, QTimer

class SerialWork(QObject):

    def __init__(self):

        super().__init__()

    def init(self):

        self.com = QSerialPort()

        self.com.setPortName('COM7')

        self.com.setBaudRate(115200)  

        if self.com.open(QSerialPort.ReadWrite) == False:

            return

        self.readtimer = QTimer()

        self.readtimer.timeout.connect(self.readData)

        self.readtimer.start(100)

    def readData(self):

        revData = self.com.readAll()

        revData = bytes(revData)

        print('%d read' % len(revData))

class PyQt_Serial(QWidget):

    def __init__(self):

        super().__init__()

        self.serialthread = QThread()

        self.serialwork = SerialWork()

        self.serialwork.moveToThread(self.serialthread)

        self.serialthread.started.connect(self.serialwork.init)

        self.serialthread.start()

if __name__ == '__main__':

    app = QApplication(sys.argv)

    win = PyQt_Serial()

    win.show()

    sys.exit(app.exec_())