Thread: Socket Send

I'me making an application to read and write sensors from C (Server) to Java(Client).

The Server must run 24/7 and must always send new sensor data to the client. I have made a test application to send and read data from the socket.

Server:

Code:

int main(int argc, char *argv[]) {
    char* msg = "Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80";
    int clientSocket;

    openServerSocket(2300);
    bindServerSocket();
    listenOnSocket();
    clientSocket = connectToClient();
    while(1){
    sendData(msg);
    }
    return 0;
}

Sendata:

Code:

send(commSocket, msg, strlen(msg), 0);

The MSG variable is a test the real application will read data from the sensors.

The java client:

Code:

    public static void main(String[] args) throws UnknownHostException, IOException {
                Socket socket = new Socket("localhost", 2300);
        String str = "initialize";
        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        while ((str = br.readLine()) != null) {
            System.out.println(str);
        }
    }

As you can see i have put a while loop in the server to send all the time new data. But it never come to the client. when I remove the while loop so it will send once it will come to the client.

I think that the send function will be used when the server is complete to the end off the application.

I hope you can help me.

P.S. sorry for my bad english..

I won't work. When I debug the server and go 3 time through the while loop and when i quit the server than i recv the data.

This is only a test application but the technique is the same

My server:

Code:

int main(int argc, char *argv[]) {
    char* msg = "Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80";
    int clientSocket;

    openServerSocket(2300);
    bindServerSocket();
    listenOnSocket();
    clientSocket = connectToClient();
    int i;
    for(i=0; i<8; i++){
        sleep(5);
    sendData(msg);
    }
    return 0;
    }

Java client:

Code:

    public static void main(String[] args) throws UnknownHostException, IOException, InterruptedException {
                Socket socket = new Socket("localhost", 2300);
        String str = "initialize";
        while(true){
        BufferedReader br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
        while ((str = br.readLine()) != null) {
            System.out.println(str);
        }
        }
    }

The result is this:

The result will only came when the server is complete. And not 1 by 1.

Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80Sensor01#10#10#10#10-Sensor02#20#20#20#20-Sensor03#30#30#30#30-Sensor04#40#40#40#40-Sensor05#50#50#50#50-Sensor06#60#60#60#60-Sensor07#70#70#70#70-Sensor08#80#80#80#80