Saving Screenshot from Rohde and Schwarz Spectrum Analyser to PC

[Pariposh]

Hey, I want to capture a screenshot on Rohde and Schwarz Spectrum Analyser via ethernet commands and then automatically retrieve that screenshot to my PC location via ethernet TCPIP but im not able to retrieve the screenshot back after taking the screenshot.
Kindly Help me with this ,

Currently im trying with the below code :

     //Send the command to capture a screenshot
            strcpy(buffer, ":DISPlay:DATA? PNG, COLor");
            if (send(sa_socket_desc, buffer, strlen(buffer), 0) < 0) {
                perror("Send error");
                exit(1);
            }

            // Receive the screenshot data
            fp = fopen("screenshot.png", "wb");
            if (fp == NULL) {
                perror("File open error");
                exit(1);

                while ((bytes_read = recv(sa_socket_desc, buffer, BUFFER_SIZE, 0)) > 0) {
                    fwrite(buffer, 1, bytes_read, fp);
                }

                fclose(fp);

[JonB]

@Pariposh
Code above should work but has nothing to do with Qt. Since all it does is save every byte received to a file nobody can know what the issue in your case might be.

EDIT
Oh, hang on a minute, your code is not right! Look at when/where you have set your while loop to execute :)

[Pariposh]

@JonB i gaave some debug prints in the above code already and got to know that there is some issue in the while loop only , but im not getting how to resolve that issue.

[jsulm]

@Pariposh said in Saving Screenshot from Rohde and Schwarz Spectrum Analyser to PC:

but im not getting how to resolve that issue

What about telling us what that issue actually is?

[JonB]

@Pariposh
Just look at your code:

 exit(1);

 while ((bytes_read = recv(sa_socket_desc, buffer, BUFFER_SIZE, 0)) > 0) {

This cannot possibly be correct, can it?