# -*- 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_())