I want make device execute command , when I press the radio-button in QT

[segtteee]

@mrjj
thank you for reply.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    mSerialport = new QSerialPort (this);
    connect(ui->pushButton_send,&QPushButton::clicked,[=](){
        sendMsg(ui->command->toPlainText());

    });
    connect(ui->radioButton_on,&QRadioButton::clicked,[=](){
        monitor_mode_on();
    });

    connect(ui->radioButton_off,&QRadioButton::clicked,[=](){
        monitor_mode_off();
    });
}

Is this the right structure for the rules? Add two connectors below and it will not run . (Two sentences inclusing radio-button)

[mrjj]

Well on button you call sendMsg and for the
radioButton_on you call monitor_mode_on() which will send a command and
same does radioButton_off
Which seem pretty ok if monitor_mode_on/off sends
command to device to enable/disable something.

[segtteee]

@mrjj
I think mSerialport->write("XXX"); is wrong.
my device couldn't recognize command.

[mrjj]

@segtteee
Hi
In what way wrong?
the XXX was just example
you need
mSerialport->write("mon 1");
or what ever real command is. :)

[segtteee]

@mrjj
I wrote mSerialport-> write ("mon 1"); but device doesn't work.
So is not the code wrong?

[mrjj]

@segtteee
Nope, should send the string if port is open etc.
The write function returns how many bytes written.

so you can do
qDebug() << "written->" << mSerialport->write("mon 1");
(#include <QDebug>)

Can you see on device if it gets the string?

[segtteee]

@mrjj
i wrote qDebug() << "written->" << mSerialport->write("mon 1");
and i can see 'written-> 5' in application output window.
What does this mean?
The equipment does not carry out orders ("mon 1" or "mon 0") .

[mrjj]

@segtteee
It means that it wrote 5 chars to the serial port.
so it seems it does send it :)

• The equipment does not carry out orders ("mon 1" or "mon 0") .
  And you are sure that is the syntax for the command?
  And board are ready to accept commands etc?
  Who wrote the code on the board?

[segtteee]

@mrjj
By writing behind "\ N" I had solved the problem . Thank you!!

[mrjj]

@segtteee
ahh, it was expecting a line. not just the text.
super :)