AnsweredAssumed Answered

RTCS TCP/IP socket client setup trouble

Question asked by khoanguyen on Oct 29, 2012
Latest reply on Aug 27, 2013 by Oscar Guallar



I'm currently working with MQX 3.8.1, Codewarrior 10.2, and the Kinetis K60 tower module, and I'm having trouble connecting using my tower as a client to my laptop. I was wondering if anyone could tell me what I'm doing wrong.



  • Set laptop ethernet port to IP: and gateway:
  • trying to open a socket on the K60 to act as a client to my laptop (acting as a server)
  • attempting to reach any website to prove that it works, or any website


What does work so far:

  • Ethernet connection is successful and RTCS is up and running (started a new MQX project and added RTCS/shell support which ran successfully)
  • I set up an error checking for binding the socket and it didn't hit the error so I'm assuming that binding works.



  • Hit error message for connecting the socket so it isn't connecting the socket.



  1. Is the destination IP address supposed to be the IP for google or the server. (I tried using which is the IP of my server but that failed)
  2. what is being assigned to these declarations (i've noticed these keep popping up in numerous examples)
    1.   _ip_address   ipaddr;
    2. socketaddr_in    addr;
  3. Are there any other examples besides the Twitter example and the socket training video/pdf? These seem to have more examples for the server side but I'm trying to set up the K60 as a client to a database later on.




#define HOST   ""
#define DESTIP   IPADDR(192,168,3,1)

#define ENET_DEVICE 0

#define RTCS_DHCP 0


#define ENET_IPADDR IPADDR(192,168,3,101)

#define ENET_IPMASK IPADDR(255,255,255,0)

#define ENET_GATEWAY IPADDR(192,168,3,1)

#define RTCS_PPP 0

void connect_task(uint_32 initial_data)


    _ip_address     ipaddr;

    uint_32            sock;

    uint_32            result;

    sockaddr_in        addr;

    char*            test = "This is a test for data stream";




        if (_mutex_lock(&print_mutex) != MQX_OK)


                printf("Mutex lock failed.\n");





    addr.sin_family     = AF_INET;

    addr.sin_port        = 80;

    addr.sin_addr.s_addr = DESTIP;


    sock = socket(AF_INET, SOCK_STREAM, 0);

    result = bind(sock, &addr, sizeof(addr));

    if(result != RTCS_OK)


        printf("ERROR the socket could not be bound");




    addr.sin_port = 80;

   addr.sin_addr.s_addr = ipaddr;


    result = connect(sock, &addr, sizeof(addr));

    if(result != RTCS_OK)


            printf("ERROR the socket could not CONNECT");




        printf("Connected to %lx, port %d",addr.sin_addr.s_addr, addr.sin_port);



    printf("\nREADY TO SEND DATA!!!!!!!!!!!!!!!!!");







Khoa Nguyen