QML Serial: Multiple qml files using 1 serial port

taind

I have a window consist of 2 Items (2 .qml files). One of those was connected with serial port. But I can't use that serial port for 2nd Item.
Item 1: Checking connection and "visible" Item 2
Item 2: Emit and Receiver data
I need a advise. Thanks very much

sierdzio

Show us some code, it's hard to advise anything without it.

Sharing an object between files is definitely possible.

taind

@sierdzio This my code: Sorry for delay and my PC don't have internet

main.qml:

import QtQuick 2.12
import QtQuick.Window 2.12
import QtQuick.Controls.Material 2.12
import Qt.labs.platform 1.0
import QtQuick.Controls 2.12
import QtQuick.Dialogs 1.2 as D2
import SerialPort 1.0 
impot "."

Window {
          readonly property int w_config: 320
          readonly property int h_config: 240

          readonly property int w_vcm: 1280
          readonly property int h_vcm: 720
 
          id: home
          width: w_config
          height: h_config
          visible: true
          Material.theme: Material.Dark
          Material.accent:  Material.LightBlue
          SerialPort {
                    id: serialPort
          }
          Item {
                    id: config_page
                    visible: true
                    anchor.fill: parent
                    ConFig {
                              id: com_config
                    }
                    Connections {
                              target: con_config
                              onStartSignal: {
                                        config_page.visible = false
                                        vcm_page.visible = true
                                        
                                        console.log ("serial port in main.qml: "+ serialPort.getConnectionStatusSlot())  \\return: false      ==> THIS IS MY PROBLEM

                                        home.width = w_vcm
                                        home.height = h_vcm
                                        home.x = screen.width/2 - w_vcm/2
                                        home.y = screen.height/2 - h_vcm/2
                              }
                    }
          }
         Item {
                    id: vcm_page
                    visible: false
                    anchor.fill: parent
                    VCM02{
                              id: vcm_02
                    }
                    Connections {
                              target: vcm_02
                              onHomeSig: {
                                       
                                        home.width = w_config
                                        home.height = h_config
                                        home.x = screen.width/2 - w_config/2
                                        home.y = screen.height/2 - h_config/2

                                        config_page.visible = true
                                        vcm_page.visible = false
                              }
                    }
          }
}

ConFig.qml

import QtQuick 2.0
import QtQuick.Controls 2.12
import QtGraphicalEffects 1.0
import QtQuick.Dialogs 1.2 as D1
import SerialPort 1.0 

Item {
    width: 320
    height: 240
    anchors.centerIn: parent
    signal startSignal()
    SerialPort {
        id: serialPort
    }
    Rectangle {
        anchors.fill: parent
        color: "#3d3d4c"
        ComboBox {
            id: comList
            width: parent.width/2
            height: parent.height/6
            anchors.top: parent.top
            anchors.horizontalCenter: parent.horizontalCenter
            anchors.margins: 100
            font.pixelSize: 16
            model: serialPort.PortName       // add in serialport.h and serialport.cpp
        } 
        Button {
            id: connectBtn 
            onClicked: {
                \\check connecttion..if connection is OK enable startBtn
            }
        }
        Button {
            id: startBtn 
            onClicked: {
                startSignal()
                console.log ("serial port in ConFig.qml: "+ serialPort.getConnectionStatusSlot())  \\return: true
            }
        }
    }
}

VCM02.qml

import ....
Item {
    \\I wanna use serial port in this form but serialPort.getConnectionStatusSlot() = false 
    \\serialPort.getConnectionStatusSlot()  function in serialport.h and .cpp
}

taind

@sierdzio I found it...because I used Component "SerialPort" for each Item. So that created new Object . I try change qmlRegisterType -> QQmlComtext and it worked ...Thank you for your supporting. Have good day!!