pycharm + pyqt5 实现串口读取和显示

import sys from PyQt5.QtWidgets import* from PyQt5.QtCore import * from PyQt5.QtSql import * import pyqtgraph as pg import numpy as np import serial import GL # GL.py 中存放了程序需要用到的全局变量 # COM端口选择 print('You selected %s, baudrate %d, %d byte.' % (GL.comport, int(GL.baudrate), GL.bytes)) serialport = serial.Serial(GL.comport, int(GL.baudrate) ,timeout=0.5,parity=serial.PARITY_NONE, rtscts=1) # 定义串口接受数据的参数（初始化串口） class WorkThread(QThread): receive = pyqtSignal() def run(self): while True: if (GL.bytes == 51): data = serialport.readline() if data != '': data1 = data.decode() data1 = data1.strip().split() data1 = [str(i) for i in data1[:6]] GL.data2 = data1 self.receive.emit() class DataGrid(QWidget): def createTableAndInit(self): # 添加数据库 self.db = QSqlDatabase.addDatabase('QSQLITE') # 设置数据库名称 self.db.setDatabaseName('./db/database2.db') # 判断是否打开 if not self.db.open(): return False # 声明数据库查询对象 query = QSqlQuery() # 创建表 query.exec("create table device(id int , time int , name vchar, sex vchar, age int, deparment int )") # 添加记录 sql = "insert into device(id,time,name,sex,age,deparment) values(%d,%d,%d,%d,%d,%d)"%(GL.list[0],GL.list[1],GL.list[2],GL.list[3],GL.list[4],GL.list[5]) query.exec(sql) return True def __init__(self): super().__init__() self.setWindowTitle("物联网数据汇集点") self.resize(600, 750) self.createTableAndInit() # 当前页 self.currentPage = 0 # 总页数 self.totalPage = 0 # 总记录数 self.totalRecrodCount = 0 # 每页显示记录数 self.PageRecordCount = 6 self.initUI() self.plt = self.graphicsView.addPlot(title='传感器曲线') def initUI(self): # 创建窗口 self.createWindow() # 设置表格 self.setTableView() self.workthread = WorkThread() # 信号槽连接 self.prevButton.clicked.connect(self.onPrevButtonClick) self.nextButton.clicked.connect(self.onNextButtonClick) self.workthread.receive.connect(self.update_data) self.switchPageButton.clicked.connect(self.onSwitchPageButtonClick) self.workthread.start() def update_data(self): time = QDateTime.currentDateTime() timeDisplay = time.toString("yyyyMMdd hh:mm:ss dddd") if GL.data2 != []: self.temperature.setText(GL.data2[0]) self.pressure.setText(GL.data2[1]) self.flow.setText(GL.data2[2]) self.address.setText(GL.data2[5]) GL.list[0] = int(GL.list[0] + 1) GL.list[1] = timeDisplay[9:17] GL.list[2] = int(GL.data2[1]) GL.list[3] = int(GL.data2[0]) GL.list[4] = int(GL.data2[2]) GL.list[5] = GL.data2[5] GL.x_plot.append(GL.list[0]) GL.y_plot.append(GL.list[2]) GL.blue_plot.append(GL.list[3]) if len(GL.x_plot) == 100: GL.x_plot = [0] GL.y_plot = [0] GL.blue_plot = [0] # 用刚刚采集到的100个点，画图 self.plt.clear() self.plt.plot( GL.x_plot,GL.y_plot, pen= pg.mkPen(color='r', width=3),name="Red curve") self.plt.plot( GL.x_plot,GL.blue_plot, pen= pg.mkPen(color='b', width=3),name="Blue curve") self.db.open() query = QSqlQuery() sql_1 = """insert into device(id,time,name,sex,age,deparment) values(%d,"%s",%d,%d,%d,"%s")""" % (GL.list[0], GL.list[1], GL.list[2], GL.list[3], GL.list[4], GL.list[5]) query.exec(sql_1) self.db.close() def closeEvent(self, event): # 关闭数据库 self.db.close() # 创建窗口 def createWindow(self): # 操作布局 operatorLayout = QHBoxLayout() temperatureLayout = QHBoxLayout() pressureLayout = QHBoxLayout() flowLayout = QHBoxLayout() addressLayout = QHBoxLayout() # 传感器显示布局 self.temperature = QLabel('0') self.temperature.setFixedWidth(200) self.temperature_status = QLineEdit('NO') self.temperature_status.setFixedWidth(200) self.pressure = QLabel('0') self.pressure.setFixedWidth(200) self.pressure_status = QLineEdit('NO') self.pressure_status.setFixedWidth(200) self.flow = QLabel('0') self.flow.setFixedWidth(200) self.flow_status = QLineEdit('NO') self.flow_status.setFixedWidth(200) self.address = QLabel('0') self.address.setFixedWidth(200) self.address_status = QLineEdit('NO') self.address_status.setFixedWidth(200) # 所有的状态标签 temperature_show1 = QLabel("温度传感器:") temperature_show2 = QLabel("温度传感器工作状态:") pressure_show1 = QLabel("压力传感器:") pressure_show2 = QLabel("压力传感器工作状态:") flow_show1 = QLabel("流量传感器:") flow_show2 = QLabel("流量传感器工作状态:") address_show1 = QLabel("地址信息 :") address_show2 = QLabel("角度传感器工作状态:") # 添加布局，使用的是水平布局，然后垂直摆放 temperatureLayout.addWidget(temperature_show1) temperatureLayout.addWidget(self.temperature) temperatureLayout.addWidget(temperature_show2) temperatureLayout.addWidget(self.temperature_status) pressureLayout.addWidget(pressure_show1) pressureLayout.addWidget(self.pressure) pressureLayout.addWidget(pressure_show2) pressureLayout.addWidget(self.pressure_status) flowLayout.addWidget(flow_show1) flowLayout.addWidget(self.flow) flowLayout.addWidget(flow_show2) flowLayout.addWidget(self.flow_status) addressLayout.addWidget(address_show1) addressLayout.addWidget(self.address) addressLayout.addWidget(address_show2) addressLayout.addWidget(self.address_status) self.prevButton = QPushButton("前一页") self.nextButton = QPushButton("后一页") self.switchPageButton = QPushButton("Go") self.switchPageLineEdit = QLineEdit('0') self.switchPageLineEdit.setFixedWidth(40) switchPage = QLabel("转到第") page = QLabel("页") operatorLayout.addWidget(self.prevButton) operatorLayout.addWidget(self.nextButton) operatorLayout.addWidget(switchPage) operatorLayout.addWidget(self.switchPageLineEdit) operatorLayout.addWidget(page) operatorLayout.addWidget(self.switchPageButton) operatorLayout.addWidget(QSplitter()) # 状态布局 statusLayout = QHBoxLayout() self.totalPageLabel = QLabel() self.totalPageLabel.setFixedWidth(70) self.currentPageLabel = QLabel() self.currentPageLabel.setFixedWidth(70) self.totalRecordLabel = QLabel() self.totalRecordLabel.setFixedWidth(70) statusLayout.addWidget(self.totalPageLabel) statusLayout.addWidget(self.currentPageLabel) statusLayout.addWidget(QSplitter()) statusLayout.addWidget(self.totalRecordLabel) # 设置表格属性 self.tableView = QTableView() # 表格宽度的自适应调整 self.tableView.horizontalHeader().setStretchLastSection(True) s