A connect function slow down the connection between QTCPserver and client
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Hello,
I am developing a code for a connection between a server and a client. My goal, is to read the messages from a device connected to my computer by a serial port (this will be the server) and sending the messages to other program that decode them. I have no troubles with read the serial port and decode the messages. But I have to implement other function: sending a message to the device from the client, I can encode the message in a QByteArray, and sending to the device. However, to make this possible I use a connect function between a signal readyRead and a function to write the message in the serial port. When I implement this function, the connection between the client and the server takes a few seconds more that without the connect.This is the connect section:
socket = server->nextPendingConnection(); connect(socket,SIGNAL(disconnected()),this,SLOT(clientDisconnected())); connect(socket,SIGNAL(readyRead()), this, SLOT(on_readyRead())); qDebug()<<"Hola Nuevo Cliente";An this is the function on_readyRead()
void MyServer::on_readyRead() { msgSend=""; socket->waitForReadyRead(3000); msgSend=socket->readAll(); qDebug()<<msgSend; mipuerto->writeMsg(msgSend); }The write function itself doesn't have any troubles, and I can send the message to the device, and it understand the message and execute the orders. However, it takes a few second to establish the connection between the server and the client. And when I send the message from the client to the server, it also takes a few seconds.
Thanks you for your help. -
Hello,
I am developing a code for a connection between a server and a client. My goal, is to read the messages from a device connected to my computer by a serial port (this will be the server) and sending the messages to other program that decode them. I have no troubles with read the serial port and decode the messages. But I have to implement other function: sending a message to the device from the client, I can encode the message in a QByteArray, and sending to the device. However, to make this possible I use a connect function between a signal readyRead and a function to write the message in the serial port. When I implement this function, the connection between the client and the server takes a few seconds more that without the connect.This is the connect section:
socket = server->nextPendingConnection(); connect(socket,SIGNAL(disconnected()),this,SLOT(clientDisconnected())); connect(socket,SIGNAL(readyRead()), this, SLOT(on_readyRead())); qDebug()<<"Hola Nuevo Cliente";An this is the function on_readyRead()
void MyServer::on_readyRead() { msgSend=""; socket->waitForReadyRead(3000); msgSend=socket->readAll(); qDebug()<<msgSend; mipuerto->writeMsg(msgSend); }The write function itself doesn't have any troubles, and I can send the message to the device, and it understand the message and execute the orders. However, it takes a few second to establish the connection between the server and the client. And when I send the message from the client to the server, it also takes a few seconds.
Thanks you for your help. -
@Dooham
Ok, I have seen that the delay is due to waitforReadyRead(x), the wait a time and freeze the program during this time. I have changed the value from 3000 to 100 and now, the program works better, but I am not really conviced about this solution.@Dooham Why do you have this waitForReadyRead() in on_readyRead()?
on_readyRead() is called when readyRead() signal is emitted and that happens when there is something to read. -
@Dooham Why do you have this waitForReadyRead() in on_readyRead()?
on_readyRead() is called when readyRead() signal is emitted and that happens when there is something to read.
