Arduino analog input to QT Gauge.

SGaist

What's that newValue ?

You seem to be trying to use a SerialPort object but you are currently accessing it's class (or Type in QML).

You either need to create a SerialPort object in QML or give an instance from it to the engine.

Did you already read the QML CPP integration chapter of Qt's documentation ?

StevieGardiner

I tried to create an object by doing;

import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Extras 1.4
import QtQuick.Controls 2.0
import SerialPortlib 1.0

Window {
    visible: true
    width: 640
    height: 480
    id: gauge

    SerialPort{
        OnOil_pressure_volt_Changed:(console.log(newValue));
    }
}

with no joy, is this what your referring too?

SGaist

Your QML slot name is wrong.

AFAIK it should be onOil_pressure_volt_changed Note that Qt's naming style is camelCase, that might help you match your code with the documentation.

You should maybe take a look at http://qmlbook.org

StevieGardiner

Ahh thank you, that was an interesting read, ive achieved what I wanted.

SGaist

Great !

In that case, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)