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這篇文章主要介紹了怎么使用Python3+PyQT5+Pyserial 實現簡單的串口工具方法，具有一定借鑒價值，感興趣的朋友可以參考下，希望大家閱讀完這篇文章之后大有收獲，下面讓小編帶著大家一起了解一下。
python常用的庫：1.requesuts；2.scrapy；3.pillow；4.twisted；5.numpy；6.matplotlib；7.pygama；8.ipyhton等。
練手項目，先上圖
先實現一個簡單的串口工具，為之后的上位機做準備
代碼如下：
github 下載地址
pyserial_demo.py
import sys
import serial
import serial.tools.list_ports
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QMessageBox
from PyQt5.QtCore import QTimer
from ui_demo_1 import Ui_Form
class 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()
# 接收數據和發送數據數目置零
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):
# 串口檢測按鈕
self.s1__box_1.clicked.connect(self.port_check)
# 串口信息顯示
self.s1__box_2.currentTextChanged.connect(self.port_imf)
# 打開串口按鈕
self.open_button.clicked.connect(self.port_open)
# 關閉串口按鈕
self.close_button.clicked.connect(self.port_close)
# 發送數據按鈕
self.s3__send_button.clicked.connect(self.data_send)
# 定時發送數據
self.timer_send = QTimer()
self.timer_send.timeout.connect(self.data_send)
self.timer_send_cb.stateChanged.connect(self.data_send_timer)
# 定時器接收數據
self.timer = QTimer(self)
self.timer.timeout.connect(self.data_receive)
# 清除發送窗口
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)
# 串口檢測
def port_check(self):
# 檢測所有存在的串口，將信息存儲在字典中
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(" 無串口")
# 串口信息
def port_imf(self):
# 顯示選定的串口的詳細信息
imf_s = self.s1__box_2.currentText()
if imf_s != "":
self.state_label.setText(self.Com_Dict[self.s1__box_2.currentText()])
# 打開串口
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", "此串口不能被打開！")
return None
# 打開串口接收定時器，周期為2ms
self.timer.start(2)
if self.ser.isOpen():
self.open_button.setEnabled(False)
self.close_button.setEnabled(True)
self.formGroupBox1.setTitle("串口狀態（已開啟）")
# 關閉串口
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)
# 接收數據和發送數據數目置零
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("串口狀態（已關閉）")
# 發送數據
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發送
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', '請輸入十六進制數據，以空格分開!')
return None
input_s = input_s[2:].strip()
send_list.append(num)
input_s = bytes(send_list)
else:
# ascii發送
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
# 接收數據
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顯示
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為b'123',要轉化成unicode字符串才能輸出到窗口中去
self.s2__receive_text.insertPlainText(data.decode('iso-8859-1'))
# 統計接收字符的數量
self.data_num_received += num
self.lineEdit.setText(str(self.data_num_received))
# 獲取到text光標
textCursor = self.s2__receive_text.textCursor()
# 滾動到底部
textCursor.movePosition(textCursor.End)
# 設置光標到text中去
self.s2__receive_text.setTextCursor(textCursor)
else:
pass
# 定時發送數據
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)
# 清除顯示
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_())ui_demo_1.py
# -*- 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, QtWidgets
class 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", "串口設置"))
self.s1__lb_1.setText(_translate("Form", "串口檢測："))
self.s1__box_1.setText(_translate("Form", "檢測串口"))
self.s1__lb_2.setText(_translate("Form", "串口選擇："))
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", "數據位："))
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", "校驗位："))
self.s1__box_5.setItemText(0, _translate("Form", "N"))
self.open_button.setText(_translate("Form", "打開串口"))
self.close_button.setText(_translate("Form", "關閉串口"))
self.s1__lb_6.setText(_translate("Form", "停止位："))
self.s1__box_6.setItemText(0, _translate("Form", "1"))
self.verticalGroupBox.setTitle(_translate("Form", "接受區"))
self.verticalGroupBox_2.setTitle(_translate("Form", "發送區"))
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", "發送"))
self.s3__clear_button.setText(_translate("Form", "清除"))
self.formGroupBox1.setTitle(_translate("Form", "串口狀態"))
self.label.setText(_translate("Form", "已接收："))
self.label_2.setText(_translate("Form", "已發送："))
self.hex_send.setText(_translate("Form", "Hex發送"))
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", "定時發送"))
self.lineEdit_3.setText(_translate("Form", "1000"))
self.dw.setText(_translate("Form", "ms/次"))感謝你能夠認真閱讀完這篇文章，希望小編分享的“怎么使用Python3+PyQT5+Pyserial 實現簡單的串口工具方法”這篇文章對大家有幫助，同時也希望大家多多支持億速云，關注億速云行業資訊頻道，更多相關知識等著你來學習!
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