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This article introduces the relevant knowledge of "how to achieve alarm linkage in Qt". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

I. Preface

The alarm linkage function is not a conventional function, but is generally customized for customers, for example, if the data collected by the detector gives an alarm, not only the alarm sound should be played locally, the alarm record should be stored, and the alarm text message and email should be sent, but also the alarm panel lamp should be triggered to alarm, and the alarm panel indicator light is also communicated by modbus protocol 485. It requires the software to send data on the designated communication port to light the alarm lamp. This communication port can be either the port used by the original equipment or an independent port, so this factor should be taken into account when making the alarm linkage information table. the alarm linkage information table should store the string number, baud rate, module address and linkage address set.

In most alarm linkage application scenarios, there may be many-to-many requirements, for example, one device alarm can trigger multiple linkage, while multiple device alarms can trigger the same linkage, this kind of application is still very extensive. Therefore, this function should be taken into account when designing software, and the specific many-to-many mapping relationship can be flexibly set by users. For example, the linkage address set of the linkage information table here, once multiple linkage addresses are set, will be triggered one by one.

II. Functional features

Collect data port, support serial port + network port, serial port support free setting of serial number + baud rate, network support free setting of IP address + communication port, each port supports collection cycle, default one address per second, support setting communication timeout times, default 3 times, support maximum reconnection time, used to re-read offline devices.

Controller information, you can add the controller name, select the controller address + controller model, and set the number of detectors under the controller.

Detector information, can add tag, free to choose detector type, gas type, gas symbol, high reported value, low reported value, buffer value, clear zero value, whether enabled, alarm sound, background map, storage cycle, numerical conversion decimal places, alarm delay time, alarm type (HH,LL,HL) and so on.

Controller model + detector type + gas type + gas symbol, all can be configured freely.

Maps can be imported and deleted, and all detectors can be dragged and saved freely.

Port information + controller information + detector information, support import and export + export to excel+ printing.

Run record + alarm record + user record, support multi-condition combination query, such as time period + controller + detector, etc., all records can be exported to excel+ printing.

Records exported to excel support all versions of table files such as excel+wps and do not rely on software such as excel.

You can delete data within a specified time range, support automatic cleaning of early data, and set the maximum number of saved records.

Support alarm short message forwarding, support multiple receiving mobile phone numbers, you can set the sending interval, such as instant sending or sending all alarm messages once every 6 hours, the text message content is too long, automatically split multiple text messages.

Support alarm email forwarding, support multiple receiving mailboxes, can set sending interval, such as immediate sending or sending all alarm messages once every 6 hours, support attachment sending.

Overreport color + underreport color + normal color + 0 value color + curve background + curve color, etc., are free to choose.

The Chinese title + English title + logo path + copyright of the software can be set freely.

Provide switch settings for boot operation + alarm sound + automatic login + remember password and so on.

Alarm sound can be set to play the number of times, the interface provides 17 kinds of skin file selection.

Cloud data synchronization is supported, and the information of cloud database can be set, such as database name, user name + password, etc.

Support network forwarding and network reception, after the network reception is turned on, the software receives data from udp for analysis. Network forwarding supports multiple target IP, so it realizes the software of local collection, and freely transfers the data to the client to view the detector data at any time.

Automatically remember the user's last stay in the interface + other information, restart and apply automatically.

The alarm automatically switches to the corresponding map, and the detector button flashes.

Double-click the detector icon to control it back.

Support user rights management, administrator + operator two categories, user login + user exit, can remember the password and automatic login, more than three error messages and close the program.

Support four monitoring modes, equipment panel monitoring + map monitoring + table data monitoring + curve data monitoring, free to switch, four synchronous applications.

Support alarm relay linkage, a tag can link multiple modules and relay numbers across serial ports, and support many-to-many.

The local data store supports sqlite+mysql and remote data synchronization to the cloud database. Automatically reconnect.

The data collected by the local device is uploaded to the cloud in real time so that it can be extracted by other methods such as APP or web.

Two kinds of data sources are supported, one is serial port and network to collect equipment data through protocol, the other is database collection. The database acquisition mode can be used as a general system.

Comes with a device simulation tool that supports 16 device data simulations, as well as database data simulations to test data when there is no device.

The default communication protocol uses modbus protocol, and later increases the support of mqtt and other Internet of things protocols to make a general system.

Supports all windows operating systems + linux operating systems and other operating systems.

Third, effect picture

Core code # include "frmconfiglink.h" # include "ui_frmconfiglink.h" # include "quiwidget.h" # include "dbhelper.h" # include "dbdelegate.h" # include "excelapi.h" # include "printapi.h" # include "api.h" frmConfigLink::frmConfigLink (QWidget * parent): QWidget (parent), ui (new Ui::frmConfigLink) {ui- > setupUi (this); this- > initForm (); this- > initData (); this- > changeStyle () } frmConfigLink::~frmConfigLink () {delete ui;} void frmConfigLink::showEvent (QShowEvent *) {model- > select ();} void frmConfigLink::initForm () {API::initTableView (ui- > tableView); ui- > widgetTop- > setProperty ("flag", "navbtn"); if (QUIHelper::deskWidth ()

< 1440) { ui->

LabTip- > setText ("prompt to restart the application after → changes");} else {ui- > labTip- > setText ("prompt that → must be consistent with the live linkage information, and restart the application after changes");}} void frmConfigLink::initData () {model = new QSqlTableModel (this); model- > setTable ("AlarmLink"); model- > setSort (0, Qt::AscendingOrder); model- > setEditStrategy (QSqlTableModel::OnManualSubmit) Model- > select (); ui- > tableView- > setModel (model); ui- > tableView- > setProperty ("model", true); columnNames.clear (); columnNames index (count-1,0). Data (). ToString (); QString comName = model- > index (count-1,1). Data (). ToString (); int baudRate = model- > index (count-1,2). Data (). ToInt () Quint8 modelAddr = model- > index (count-1,3). Data (). ToInt () + 1; QString linkAddr = model- > index (count-1,4). Data (). ToString (); QString linkEnable = model- > index (count-1,5). Data (). ToString (); if (count = = 0) {positionID = DBData::NodeInfo_PositionID.first (); comName = "COM1"; baudRate = 9600; modelAddr = 1 LinkAddr = "1"; linkEnable = "enabled";} / / set the newly added row defaults model- > setData (model- > index (count, 0), positionID); model- > setData (model- > index (count, 1), comName); model- > setData (model- > index (count, 2), baudRate); model- > setData (model- > index (count, 3), modelAddr); model- > setData (model- > index (count, 4), linkAddr) Model- > setData (model- > index (count, 5), linkEnable); ui- > tableView- > setCurrentIndex (model- > index (count, 0));} void frmConfigLink::on_btnSave_clicked () {model- > database (). Transaction (); if (model- > submitAll ()) {model- > database () commit (); DBHelper::loadAlarmLink ();} else {model- > database (). Rollback () QUIHelper::showMessageBoxError ("failed to save information, information cannot be empty, please fill in again!");}} void frmConfigLink::on_btnDelete_clicked () {if (ui- > tableView- > currentIndex () .row ()

< 0) { QUIHelper::showMessageBoxError("请选择要删除的联动信息!"); return; } if (QUIHelper::showMessageBoxQuestion("确定要删除该联动信息吗?") == QMessageBox::Yes) { int row = ui->

TableView- > currentIndex (). Row (); model- > removeRow (row); model- > submitAll (); int count = model- > rowCount (); ui- > tableView- > setCurrentIndex (model- > index (count-1,0);}} void frmConfigLink::on_btnReturn_clicked () {model- > revertAll ();} void frmConfigLink::on_btnClear_clicked () {int count = model- > rowCount (); if (count select () }} void frmConfigLink::on_btnExcel_clicked () {QString name = "alarm linkage information"; QString fileName = QString ("% 1% 2") .arg (name) .arg (QDateTime::currentDateTime (). ToString ("yyyy-MM-dd-HH-mm-ss")); QString file = API::getSaveFileNames (fileName, "Excel (* .xls)"); if (file.isEmpty ()) {return } QString columns = "PositionID,ComName,BaudRate,ModelAddr,LinkAddr,LinkEnable"; QString where = "order by PositionID asc"; QStringList content = DBHelper::getContent ("AlarmLink", columns, where, "", ";"); int rowCount = content.count (); if (rowCount = = 0) {QUIHelper::showMessageBoxError ("No data to be processed!"); return } ExcelAPI::Instance ()-> saveExcel (file, name, name, ", columnNames, columnWidths, content); QString msg = QString (" Export% 1 to Excel ") .arg (name); DBHelper::addUserLog (" user actions ", msg); if (QUIHelper::showMessageBoxQuestion (msg +" success! Are you sure you want to open it now?) = QMessageBox::Yes) {QString url = QString ("file:///%1").arg(file); QDesktopServices::openUrl (QUrl (url, QUrl::TolerantMode));}} void frmConfigLink::on_btnPrint_clicked () {QString name =" alarm linkage information "; QString columns =" PositionID,ComName,BaudRate,ModelAddr,LinkAddr,LinkEnable "; QString where =" order by PositionID asc " QStringList content = DBHelper::getContent ("AlarmLink", columns, where, "", ";); int rowCount = content.count (); if (rowCount = = 0) {QUIHelper::showMessageBoxError (" No data to be processed! "); return;} PrintAPI::Instance ()-> print (name,", columnNames, columnWidths, content); QString msg = QString (" print% 1 ") .arg (name) DBHelper::addUserLog ("user Action", msg);} void frmConfigLink::on_btnInput_clicked () {QString fileName; bool ok = DBHelper::inputData (columnNames.count (), App::FileFilter, "AlarmLink", fileName, QUIHelper::appPath () + "/ db", true); if (! fileName.isEmpty ()) {DBHelper::addUserLog ("user Action", "Import alarm linkage information") If (ok) {QUIHelper::showMessageBoxInfo ("Import alarm linkage message succeeded!", 3); model- > select ();} else {QUIHelper::showMessageBoxError ("Import alarm linkage message failed!", 3);}} void frmConfigLink::on_btnOutput_clicked () {QString columns = "*"; QString where = "order by PositionID asc" QString title = columnNames.join (App::FileSpliter); QStringList content = DBHelper::getContent ("AlarmLink", columns, where, title); QString fileName; bool ok = DBHelper::outputData ("alarm linkage information", App::FileFilter, content, fileName, QUIHelper::appPath () + "/ db"); if (! fileName.isEmpty ()) {DBHelper::addUserLog ("user actions", "Export alarm linkage information") If (ok) {QUIHelper::showMessageBoxInfo ("successfully exporting alarm linkage information!", 3);} else {QUIHelper::showMessageBoxError ("failed to export alarm linkage information!", 3);} "how to achieve alarm linkage in Qt" is introduced here, thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

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