[Solved] QtMobility Bluetooth stringData is empty

DragoslaV

Hey guys,

I'm quiet new to developing with Qt and I love its simpleness :)

For now I'm trying to make my phone (N9) communicate with my Arduino through bluetooth. I got my phone paired and I successfully connected to my device. However for some reason stringData is giving me an empty string. The event 'onDataAvailable' is triggered and the console is responding but with nothing.

Connection started:
@
Connecting to: "00:07:MY:MAC:MASKED"
Need a port/psm, doing discovery
Starting discovery
Got agent
UUID filter ("{00001101-0000-1000-8000-00805f9b34fb}")
(0) uint 65536
(1) Sequence
(1) uuid 1101
(4) Sequence
(4) Sequence
(4) uuid 0100
(4) Sequence
(4) uuid 0003
(4) int 1
(5) Sequence
(5) uuid 1002
(6) Sequence
(6) int 25966
(6) int 106
(6) int 256
(256) string Bluetooth Serial Port
FOUND SERVICE!
Socket discovery finished
Connection: true
@

Codes:
@
property string btAddress: "00:07:MY:MAC:MASKED"
BluetoothSocket {
id: blueSocket

    connected: true
    service: blueService

    onErrorChanged: {
        console.log("Error: " + blueSocket.error);
        blueSocket.connected = false;
    }
    onDataAvailable: {
        console.log(stringData);
    }
    onConnectedChanged: {
        console.log("Connection: " + connected);
    }
}

BluetoothService {
    id: blueService

    deviceAddress: btAddress
    serviceUuid: "00001101-0000-1000-8000-00805F9B34FB"
    serviceProtocol: "rfcomm"
}

Timer {
    interval: 1000; running: true; repeat: true
    onTriggered: {
        if (blueSocket.connected == true) {
           //do something
        } else {
            blueSocket.connected = true;
        }
    }
}@

Can anyone help me with this?

DragoslaV

It seems I am able to send commands to my Arduino :D by using the follow (in combination with the codes above):
@
//this will activate a LED
blueSocket.sendStringData("H");
@
But for now I am still unable to retrieve data;
Do I retrieve this in the following function? with stringData? and what can I expect from stringData? (ASCII or BYTE?)
@onDataAvailable: {
console.log(stringData);
}@

DragoslaV

After playing all day I'm still unable to retrieve any data, the events are triggered but I read nothing out stringData.... Could it be because my Arduino+Bluetooth runs on a 115200 baudrate and the RFCOMM runs on a 9600 baudrate??

This is super frustrating since this is my last step to get things done (the rest of the application is working)...

DragoslaV

Arghhh after 3 days I'm still unable to retrieve any data in Qt...

Somebody got any direction?

DragoslaV

I got it solved.

QtQuick's bluetooth is buggy.
I made a C++ class and connected that with setContextRoot into my QtQuick application.
I can send a println function in my arduino to get it readable in C++.

I'm not a developer, so I cant report this bug.