使用Python3+PyQT5+Pyserial 实现简单的串口工具方法

import sysimport serialimport serial.tools.list_portsfrom PyQt5 import QtWidgetsfrom PyQt5.QtWidgets import QMessageBoxfrom PyQt5.QtCore import QTimerfrom ui_demo_1 import Ui_Formclass Pyqt5_Serial(QtWidgets.QWidget, Ui_Form):  def __init__(self):    super(Pyqt5_Serial, self).__init__()    self.setupUi(self)    self.init()    self.setWindowTitle("串口小助手")    self.ser = serial.Serial()    self.port_check()    # 接收数据和发送数据数目置零    self.data_num_received = 0    self.lineEdit.setText(str(self.data_num_received))    self.data_num_sended = 0    self.lineEdit_2.setText(str(self.data_num_sended))  def init(self):    # 串口检测按钮    self.s1__box_1.clicked.connect(self.port_check)    # 串口信息显示    self.s1__box_2.currentTextChanged.connect(self.port_imf)    # 打开串口按钮    self.open_button.clicked.connect(self.port_open)    # 关闭串口按钮    self.close_button.clicked.connect(self.port_close)    # 发送数据按钮    self.s3__send_button.clicked.connect(self.data_send)    # 定时发送数据    self.timer_send = QTimer()    self.timer_send.timeout.connect(self.data_send)    self.timer_send_cb.stateChanged.connect(self.data_send_timer)    # 定时器接收数据    self.timer = QTimer(self)    self.timer.timeout.connect(self.data_receive)    # 清除发送窗口    self.s3__clear_button.clicked.connect(self.send_data_clear)    # 清除接收窗口    self.s2__clear_button.clicked.connect(self.receive_data_clear)  # 串口检测  def port_check(self):    # 检测所有存在的串口，将信息存储在字典中    self.Com_Dict = {}    port_list = list(serial.tools.list_ports.comports())    self.s1__box_2.clear()    for port in port_list:      self.Com_Dict["%s" % port[0]] = "%s" % port[1]      self.s1__box_2.addItem(port[0])    if len(self.Com_Dict) == 0:      self.state_label.setText(" 无串口")  # 串口信息  def port_imf(self):    # 显示选定的串口的详细信息    imf_s = self.s1__box_2.currentText()    if imf_s != "":      self.state_label.setText(self.Com_Dict[self.s1__box_2.currentText()])  # 打开串口  def port_open(self):    self.ser.port = self.s1__box_2.currentText()    self.ser.baudrate = int(self.s1__box_3.currentText())    self.ser.bytesize = int(self.s1__box_4.currentText())    self.ser.stopbits = int(self.s1__box_6.currentText())    self.ser.parity = self.s1__box_5.currentText()    try:      self.ser.open()    except:      QMessageBox.critical(self, "Port Error", "此串口不能被打开！")      return None    # 打开串口接收定时器，周期为2ms    self.timer.start(2)    if self.ser.isOpen():      self.open_button.setEnabled(False)      self.close_button.setEnabled(True)      self.formGroupBox1.setTitle("串口状态（已开启）")  # 关闭串口  def port_close(self):    self.timer.stop()    self.timer_send.stop()    try:      self.ser.close()    except:      pass    self.open_button.setEnabled(True)    self.close_button.setEnabled(False)    self.lineEdit_3.setEnabled(True)    # 接收数据和发送数据数目置零    self.data_num_received = 0    self.lineEdit.setText(str(self.data_num_received))    self.data_num_sended = 0    self.lineEdit_2.setText(str(self.data_num_sended))    self.formGroupBox1.setTitle("串口状态（已关闭）")  # 发送数据  def data_send(self):    if self.ser.isOpen():      input_s = self.s3__send_text.toPlainText()      if input_s != "":        # 非空字符串        if self.hex_send.isChecked():          # hex发送          input_s = input_s.strip()          send_list = []          while input_s != '':            try:              num = int(input_s[0:2], 16)            except ValueError:              QMessageBox.critical(self, 'wrong data', '请输入十六进制数据，以空格分开!')              return None            input_s = input_s[2:].strip()            send_list.append(num)          input_s = bytes(send_list)        else:          # ascii发送          input_s = (input_s + '/r/n').encode('utf-8')        num = self.ser.write(input_s)        self.data_num_sended += num        self.lineEdit_2.setText(str(self.data_num_sended))    else:      pass  # 接收数据  def data_receive(self):    try:      num = self.ser.inWaiting()    except:      self.port_close()      return None    if num > 0:      data = self.ser.read(num)      num = len(data)      # hex显示      if self.hex_receive.checkState():        out_s = ''        for i in range(0, len(data)):          out_s = out_s + '{:02X}'.format(data[i]) + ' '        self.s2__receive_text.insertPlainText(out_s)      else:        # 串口接收到的字符串为b'123',要转化成unicode字符串才能输出到窗口中去        self.s2__receive_text.insertPlainText(data.decode('iso-8859-1'))      # 统计接收字符的数量      self.data_num_received += num      self.lineEdit.setText(str(self.data_num_received))      # 获取到text光标      textCursor = self.s2__receive_text.textCursor()      # 滚动到底部      textCursor.movePosition(textCursor.End)      # 设置光标到text中去      self.s2__receive_text.setTextCursor(textCursor)    else:      pass  # 定时发送数据  def data_send_timer(self):    if self.timer_send_cb.isChecked():      self.timer_send.start(int(self.lineEdit_3.text()))      self.lineEdit_3.setEnabled(False)    else:      self.timer_send.stop()      self.lineEdit_3.setEnabled(True)  # 清除显示  def send_data_clear(self):    self.s3__send_text.setText("")  def receive_data_clear(self):    self.s2__receive_text.setText("")if __name__ == '__main__':  app = QtWidgets.QApplication(sys.argv)  myshow = Pyqt5_Serial()  myshow.show()  sys.exit(app.exec_())

# -*- coding: utf-8 -*-# Form implementation generated from reading ui file 'demo_1.ui'## Created by: PyQt5 UI code generator 5.6## WARNING! All changes made in this file will be lost!from PyQt5 import QtCore, QtGui, QtWidgetsclass Ui_Form(object):  def setupUi(self, Form):    Form.setObjectName("Form")    Form.resize(707, 458)    self.formGroupBox = QtWidgets.QGroupBox(Form)    self.formGroupBox.setGeometry(QtCore.QRect(20, 20, 167, 301))    self.formGroupBox.setObjectName("formGroupBox")    self.formLayout = QtWidgets.QFormLayout(self.formGroupBox)    self.formLayout.setContentsMargins(10, 10, 10, 10)    self.formLayout.setSpacing(10)    self.formLayout.setObjectName("formLayout")    self.s1__lb_1 = QtWidgets.QLabel(self.formGroupBox)    self.s1__lb_1.setObjectName("s1__lb_1")    self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.s1__lb_1)    self.s1__box_1 = QtWidgets.QPushButton(self.formGroupBox)    self.s1__box_1.setAutoRepeatInterval(100)    self.s1__box_1.setDefault(True)    self.s1__box_1.setObjectName("s1__box_1")    self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.s1__box_1)    self.s1__lb_2 = QtWidgets.QLabel(self.formGroupBox)    self.s1__lb_2.setObjectName("s1__lb_2")    self.formLayout.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.s1__lb_2)    self.s1__box_2 = QtWidgets.QComboBox(self.formGroupBox)    self.s1__box_2.setObjectName("s1__box_2")    self.formLayout.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.s1__box_2)    self.s1__lb_3 = QtWidgets.QLabel(self.formGroupBox)    self.s1__lb_3.setObjectName("s1__lb_3")    self.formLayout.setWidget(3, QtWidgets.QFormLayout.LabelRole, self.s1__lb_3)    self.s1__box_3 = QtWidgets.QComboBox(self.formGroupBox)    self.s1__box_3.setObjectName("s1__box_3")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.s1__box_3.addItem("")    self.formLayout.setWidget(3, QtWidgets.QFormLayout.FieldRole, self.s1__box_3)    self.s1__lb_4 = QtWidgets.QLabel(self.formGroupBox)    self.s1__lb_4.setObjectName("s1__lb_4")    self.formLayout.setWidget(4, QtWidgets.QFormLayout.LabelRole, self.s1__lb_4)    self.s1__box_4 = QtWidgets.QComboBox(self.formGroupBox)    self.s1__box_4.setObjectName("s1__box_4")    self.s1__box_4.addItem("")    self.s1__box_4.addItem("")    self.s1__box_4.addItem("")    self.s1__box_4.addItem("")    self.formLayout.setWidget(4, QtWidgets.QFormLayout.FieldRole, self.s1__box_4)    self.s1__lb_5 = QtWidgets.QLabel(self.formGroupBox)    self.s1__lb_5.setObjectName("s1__lb_5")    self.formLayout.setWidget(5, QtWidgets.QFormLayout.LabelRole, self.s1__lb_5)    self.s1__box_5 = QtWidgets.QComboBox(self.formGroupBox)    self.s1__box_5.setObjectName("s1__box_5")    self.s1__box_5.addItem("")    self.formLayout.setWidget(5, QtWidgets.QFormLayout.FieldRole, self.s1__box_5)    self.open_button = QtWidgets.QPushButton(self.formGroupBox)    self.open_button.setObjectName("open_button")    self.formLayout.setWidget(7, QtWidgets.QFormLayout.SpanningRole, self.open_button)    self.close_button = QtWidgets.QPushButton(self.formGroupBox)    self.close_button.setObjectName("close_button")    self.formLayout.setWidget(8, QtWidgets.QFormLayout.SpanningRole, self.close_button)    self.s1__lb_6 = QtWidgets.QLabel(self.formGroupBox)    self.s1__lb_6.setObjectName("s1__lb_6")    self.formLayout.setWidget(6, QtWidgets.QFormLayout.LabelRole, self.s1__lb_6)    self.s1__box_6 = QtWidgets.QComboBox(self.formGroupBox)    self.s1__box_6.setObjectName("s1__box_6")    self.s1__box_6.addItem("")    self.formLayout.setWidget(6, QtWidgets.QFormLayout.FieldRole, self.s1__box_6)    self.state_label = QtWidgets.QLabel(self.formGroupBox)    self.state_label.setText("")    self.state_label.setTextFormat(QtCore.Qt.AutoText)    self.state_label.setScaledContents(True)    self.state_label.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)    self.state_label.setObjectName("state_label")    self.formLayout.setWidget(2, QtWidgets.QFormLayout.SpanningRole, self.state_label)    self.verticalGroupBox = QtWidgets.QGroupBox(Form)    self.verticalGroupBox.setGeometry(QtCore.QRect(210, 20, 401, 241))    self.verticalGroupBox.setObjectName("verticalGroupBox")    self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalGroupBox)    self.verticalLayout.setContentsMargins(10, 10, 10, 10)    self.verticalLayout.setObjectName("verticalLayout")    self.s2__receive_text = QtWidgets.QTextBrowser(self.verticalGroupBox)    self.s2__receive_text.setObjectName("s2__receive_text")    self.verticalLayout.addWidget(self.s2__receive_text)    self.verticalGroupBox_2 = QtWidgets.QGroupBox(Form)    self.verticalGroupBox_2.setGeometry(QtCore.QRect(210, 280, 401, 101))    self.verticalGroupBox_2.setObjectName("verticalGroupBox_2")    self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.verticalGroupBox_2)    self.verticalLayout_2.setContentsMargins(10, 10, 10, 10)    self.verticalLayout_2.setObjectName("verticalLayout_2")    self.s3__send_text = QtWidgets.QTextEdit(self.verticalGroupBox_2)    self.s3__send_text.setObjectName("s3__send_text")    self.verticalLayout_2.addWidget(self.s3__send_text)    self.s3__send_button = QtWidgets.QPushButton(Form)    self.s3__send_button.setGeometry(QtCore.QRect(620, 310, 61, 31))    self.s3__send_button.setObjectName("s3__send_button")    self.s3__clear_button = QtWidgets.QPushButton(Form)    self.s3__clear_button.setGeometry(QtCore.QRect(620, 350, 61, 31))    self.s3__clear_button.setObjectName("s3__clear_button")    self.formGroupBox1 = QtWidgets.QGroupBox(Form)    self.formGroupBox1.setGeometry(QtCore.QRect(20, 340, 171, 101))    self.formGroupBox1.setObjectName("formGroupBox1")    self.formLayout_2 = QtWidgets.QFormLayout(self.formGroupBox1)    self.formLayout_2.setContentsMargins(10, 10, 10, 10)    self.formLayout_2.setSpacing(10)    self.formLayout_2.setObjectName("formLayout_2")    self.label = QtWidgets.QLabel(self.formGroupBox1)    self.label.setObjectName("label")    self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.label)    self.label_2 = QtWidgets.QLabel(self.formGroupBox1)    self.label_2.setObjectName("label_2")    self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.label_2)    self.lineEdit = QtWidgets.QLineEdit(self.formGroupBox1)    self.lineEdit.setObjectName("lineEdit")    self.formLayout_2.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.lineEdit)    self.lineEdit_2 = QtWidgets.QLineEdit(self.formGroupBox1)    self.lineEdit_2.setObjectName("lineEdit_2")    self.formLayout_2.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.lineEdit_2)    self.hex_send = QtWidgets.QCheckBox(Form)    self.hex_send.setGeometry(QtCore.QRect(620, 280, 71, 16))    self.hex_send.setObjectName("hex_send")    self.hex_receive = QtWidgets.QCheckBox(Form)    self.hex_receive.setGeometry(QtCore.QRect(620, 40, 71, 16))    self.hex_receive.setObjectName("hex_receive")    self.s2__clear_button = QtWidgets.QPushButton(Form)    self.s2__clear_button.setGeometry(QtCore.QRect(620, 80, 61, 31))    self.s2__clear_button.setObjectName("s2__clear_button")    self.timer_send_cb = QtWidgets.QCheckBox(Form)    self.timer_send_cb.setGeometry(QtCore.QRect(260, 390, 71, 16))    self.timer_send_cb.setObjectName("timer_send_cb")    self.lineEdit_3 = QtWidgets.QLineEdit(Form)    self.lineEdit_3.setGeometry(QtCore.QRect(350, 390, 61, 20))    self.lineEdit_3.setAlignment(QtCore.Qt.AlignRight|QtCore.Qt.AlignTrailing|QtCore.Qt.AlignVCenter)    self.lineEdit_3.setObjectName("lineEdit_3")    self.dw = QtWidgets.QLabel(Form)    self.dw.setGeometry(QtCore.QRect(420, 390, 54, 20))    self.dw.setObjectName("dw")    self.verticalGroupBox.raise_()    self.verticalGroupBox_2.raise_()    self.formGroupBox.raise_()    self.s3__send_button.raise_()    self.s3__clear_button.raise_()    self.formGroupBox.raise_()    self.hex_send.raise_()    self.hex_receive.raise_()    self.s2__clear_button.raise_()    self.timer_send_cb.raise_()    self.lineEdit_3.raise_()    self.dw.raise_()    self.retranslateUi(Form)    QtCore.QMetaObject.connectSlotsByName(Form)  def retranslateUi(self, Form):    _translate = QtCore.QCoreApplication.translate    Form.setWindowTitle(_translate("Form", "Form"))    self.formGroupBox.setTitle(_translate("Form", "串口设置"))    self.s1__lb_1.setText(_translate("Form", "串口检测："))    self.s1__box_1.setText(_translate("Form", "检测串口"))    self.s1__lb_2.setText(_translate("Form", "串口选择："))    self.s1__lb_3.setText(_translate("Form", "波特率："))    self.s1__box_3.setItemText(0, _translate("Form", "115200"))    self.s1__box_3.setItemText(1, _translate("Form", "2400"))    self.s1__box_3.setItemText(2, _translate("Form", "4800"))    self.s1__box_3.setItemText(3, _translate("Form", "9600"))    self.s1__box_3.setItemText(4, _translate("Form", "14400"))    self.s1__box_3.setItemText(5, _translate("Form", "19200"))    self.s1__box_3.setItemText(6, _translate("Form", "38400"))    self.s1__box_3.setItemText(7, _translate("Form", "57600"))    self.s1__box_3.setItemText(8, _translate("Form", "76800"))    self.s1__box_3.setItemText(9, _translate("Form", "12800"))    self.s1__box_3.setItemText(10, _translate("Form", "230400"))    self.s1__box_3.setItemText(11, _translate("Form", "460800"))    self.s1__lb_4.setText(_translate("Form", "数据位："))    self.s1__box_4.setItemText(0, _translate("Form", "8"))    self.s1__box_4.setItemText(1, _translate("Form", "7"))    self.s1__box_4.setItemText(2, _translate("Form", "6"))    self.s1__box_4.setItemText(3, _translate("Form", "5"))    self.s1__lb_5.setText(_translate("Form", "校验位："))    self.s1__box_5.setItemText(0, _translate("Form", "N"))    self.open_button.setText(_translate("Form", "打开串口"))    self.close_button.setText(_translate("Form", "关闭串口"))    self.s1__lb_6.setText(_translate("Form", "停止位："))    self.s1__box_6.setItemText(0, _translate("Form", "1"))    self.verticalGroupBox.setTitle(_translate("Form", "接受区"))    self.verticalGroupBox_2.setTitle(_translate("Form", "发送区"))    self.s3__send_text.setHtml(_translate("Form", "<!DOCTYPE HTML PUBLIC /"-//W3C//DTD HTML 4.0//EN/" /"http://www.w3.org/TR/REC-html40/strict.dtd/">/n""<html><head><meta name=/"qrichtext/" content=/"1/" /><style type=/"text/css/">/n""p, li { white-space: pre-wrap; }/n""</style></head><body style=/" font-family:/'SimSun/'; font-size:9pt; font-weight:400; font-style:normal;/">/n""<p style=/" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;/">123456</p></body></html>"))    self.s3__send_button.setText(_translate("Form", "发送"))    self.s3__clear_button.setText(_translate("Form", "清除"))    self.formGroupBox1.setTitle(_translate("Form", "串口状态"))    self.label.setText(_translate("Form", "已接收："))    self.label_2.setText(_translate("Form", "已发送："))    self.hex_send.setText(_translate("Form", "Hex发送"))    self.hex_receive.setText(_translate("Form", "Hex接收"))    self.s2__clear_button.setText(_translate("Form", "清除"))    self.timer_send_cb.setText(_translate("Form", "定时发送"))    self.lineEdit_3.setText(_translate("Form", "1000"))    self.dw.setText(_translate("Form", "ms/次"))