Sending QJsonArray over socket

[Christian Ehrlicher]

Then print out what you really receive to see if it's what you're sending. Also print out what you really send on the sender side.

[Kris Revi]

So i did this

void Socket::sendCommandStrip(const QString &bName, const QJsonValue bValue)
{
    m_webSocket.sendTextMessage(QJsonDocument(QJsonObject{{bName, bValue}}).toJson(QJsonDocument::Compact));
    qDebug() << QJsonDocument(QJsonObject{{bName, bValue}}).toJson(QJsonDocument::Compact);
}

and got

"{\"pixArt\":[]}"

now my question is, why? :S

@Christian-Ehrlicher

if i do this

socket.sendCommandStrip(QString("pixArt"), QJsonValue(RGB565).toArray());

i get the correct output (im not copying all 16k + here)

"{\"pixArt\":[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,30912,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,30912,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,30912,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,30912,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,30912,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,30912,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,30912,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,61888,

it ends with this

0,0,0,0,0,0,0,0,0]}"
[SOCKET][INFO] We are closing the connection

again it disconnects me after :S

on the ESP32 side i get this

Incoming data from socket!
Empty input!
[SOCKET][STATUS] [0] Disconnected!

[Christian Ehrlicher]

I said you should output what you really send, not what you pass to a function you wrote.

[Kris Revi]

@Christian-Ehrlicher that is what i send....

qDebug() << QJsonDocument(QJsonObject{{bName, bValue}}).toJson(QJsonDocument::Compact);

[Christian Ehrlicher]

So what do you get on the esp side?

[Kris Revi]

@Christian-Ehrlicher the same as stated above

Incoming data from socket!
Empty input!
[SOCKET][STATUS] [0] Disconnected!

it claims inData['pixArt'] is empty and the disconnects me :S

[Christian Ehrlicher]

@Kris-Revi said in Sending QJsonArray over socket:

the same as stated above

I don't want processed output but the raw data (for the third time...)

[Kris Revi]

@Christian-Ehrlicher
like this?

            JsonArray test = inData["pixArt"];

            Serial.println(test);
            Serial.println(inData["pixArt"].as<JsonArray>());

this just gives me

Incoming data from socket!
0
0
Empty input!
[SOCKET][STATUS] [0] Disconnected!

[Christian Ehrlicher]

I'm giving up... don't know what's so hard to print out the raw incoming data. Good luck.

[JKSH]

@Kris-Revi said in Sending QJsonArray over socket:

like this?

No. Please show us your payload. What does it look like before you passed it into deserializeJson()? (This is what @Christian-Ehrlicher meant by "raw data")

Also:

1. What is the value of length in webSocketEvent()?
2. Converting an image into a QJsonArray is very expensive and inefficient. What is the purpose using QJsonArray here?