Wi-Fi Combo Forum Discussions

Hi,

When use wiced_bt_ble_scan() there is a parameter call scan_type,

so we can set BTM_BLE_SCAN_TYPE_HIGH_DUTY or BTM_BLE_SCAN_TYPE_LOW_DUTY.

And I can find the corresponding scan interval/window/duration in wiced_bt_cfg_settings_t.

However, with wiced_bt_ble_observe(), I don't find such duty cycle setting.

So I have no idea what is the duty cycle setting used by wiced_bt_ble_observe().

For my application I need to port app code that uses FreeRTOS function calls so I want to by bypass the WICED abstraction layer and use FreeRTOS directly.

When I build the project in debug mode and run it,  the GDB session does not show the task in the Debug window. If I pause execution, the GDB session disconnects (and I have to close openocd-all-brcm-libftdi.exe in task manager).

I can run a basic  app with the WICED abstraction layer + freeRTOS and it run in the debugger fine with all the tasks listed in the Debug window (top left of IDE).

Any ideas? Is there something that provides information for GDB to populate the Debug screen that I am missing?

Hello!

I am using the HTTP client library to make 3 different requests. One request is posted continuously. The second and third is sent every minute sequentially (through flags), like: 0 -> 1 -> 2. The same connection sends different requests.

I use the keep alive header to keep the connection open. Due to some configurations on the sever, I get disconnected roughly every minute so I use a flag to call the http_client_disconnect() and http_request_deinit() APIs and I'm back in business. However I have noticed that sometimes, after a while say 30-40minutes (this is just an estimate) later my requests start bombing. I start getting semaphore timeouts on all of them and things never recover. I am not entirely sure how to debug this problem. I'm not sure if it is related to how I re-initialize my requests. What is the right way to re-initialize the request/connection after getting a disconnect callback? Such a callback might be received while processing any of the 3 requests. My 2nd request is a housekeeping request that is a long json and the 3rd is a http bulk request which can get huge if my queue size gets bigger, so they have a higher semaphore timeout.

I have provided a snippet of what I'm trying, hope someone can give me some hints to debug this!

// 1 min timer
static void housekeeping_callback(void *arg)
{
    send_packet_type = 1;
}
static void http_send_thread( uint32_t arg )
{
    wiced_result_t result;
    WPRINT_APP_INFO (( "Started httpservice_thread\n" ));
    do
    {
        /*wait for network up*/
        wiced_rtos_delay_milliseconds( 100 );
    } while ( wiced_network_is_ip_up( WICED_STA_INTERFACE ) != WICED_TRUE );
    while ( 1 )
    {
        /* check for network link */
        if ( wiced_network_is_ip_up( WICED_STA_INTERFACE ) != WICED_TRUE )
        {
            wiced_rtos_delay_milliseconds( 100 );
            continue;
        }
        switch (send_packet_type) {
            case 0:
            {
                wiced_rtos_pop_from_queue( &whttp_queue, &pop, WICED_NEVER_TIMEOUT );
                send_packet();
            }
            break;
            case 1:
                send_housekeeping_packet();
                send_packet_type = 2;
            break;
            case 2:
            {
                int count = get_queue_size();
                char *bulk_packet = (char *)malloc(sizeof ( (count) * sizeof(buffer) ) );
                for (int i = 0; i < count; i++) {
                    wiced_rtos_pop_from_queue( &whttp_queue, &pop, 200 );
                }
                send_bulk_packet();
                free(bulk_packet);
                send_packet_type = 0;
            }
            break;
            default:
            break;
        }
    }
}
// requests 1 and 2 follow same pattern!
// static void send_housekeeping_packet()
// static void send_bulk_packet()
static void send_packet()
{
    wiced_result_t result;
        if (got_disconnected) {
            http_request_deinit( &requests[0] );
            http_client_disconnect( &client );
            wiced_rtos_delay_milliseconds( 50 );
            got_disconnected = WICED_FALSE;
        }
    if ( wiced_network_is_ip_up( WICED_STA_INTERFACE ) == WICED_TRUE && is_connected_http == WICED_FALSE) {
        // configure HTTP client parameters
    client_configuration.flag = (http_client_configuration_flags_t)(HTTP_CLIENT_CONFIG_FLAG_SERVER_NAME | HTTP_CLIENT_CONFIG_FLAG_MAX_FRAGMENT_LEN);
    client_configuration.server_name = (uint8_t*) SERVER_HOST;
    client_configuration.max_fragment_length = TLS_FRAGMENT_LENGTH_1024;
    http_client_configure(&client, &client_configuration);
    WPRINT_APP_DEBUG( ( "Connecting to %s\n", SERVER_HOST ) );
    // if you set hostname, library will make sure subject name in the server certificate is matching with host name you are trying to connect. pass NULL if you don't want to enable this check
    client.peer_cn = (uint8_t*) SERVER_HOST;
        if ( ( result = http_client_connect( &client, (const wiced_ip_address_t*)&ip_address, SERVER_PORT, HTTP_NO_SECURITY, CONNECT_TIMEOUT_MS ) ) != WICED_SUCCESS )
        {
            WPRINT_APP_INFO( ( "Error: failed to connect to server: %u\n", result) );
            return;
        } else {
            is_connected_http = WICED_TRUE;
        }
    }
    WPRINT_APP_DEBUG( ( "Connected\n" ) );
    jsonize_packet(send_packet_buffer);
    header[0].field        = HTTP_HEADER_HOST;
    header[0].field_length = sizeof( HTTP_HEADER_HOST ) - 1;
    header[0].value        = SERVER_HOST;
    header[0].value_length = sizeof( SERVER_HOST ) - 1;
    #define JSON_URL "application/json"
    header[1].field        = HTTP_HEADER_CONTENT_TYPE;
    header[1].field_length = sizeof( HTTP_HEADER_CONTENT_TYPE ) - 1;
    header[1].value        = JSON_URL;
    header[1].value_length = sizeof( JSON_URL ) - 1;
    #define CONNECTION "Keep-Alive"
    header[3].field        = HTTP_HEADER_CONNECTION;
    header[3].field_length = sizeof( HTTP_HEADER_CONNECTION ) - 1;
    header[3].value        = CONNECTION;
    header[3].value_length = sizeof(CONNECTION) - 1;
    char messageLengthBuffer[10]; // Enough to hold the characters for the Content-Length: header
    sprintf(messageLengthBuffer," %d",strlen(send_packet_buffer)); // Put the message body into the buffer so that you can strlen it
    header[2].field        = HTTP_HEADER_CONTENT_LENGTH;
    header[2].field_length = sizeof( HTTP_HEADER_CONTENT_LENGTH ) - 1;
    header[2].value        = messageLengthBuffer;
    header[2].value_length = strlen(messageLengthBuffer);
    wiced_time_get_time(&start_send_time);
    http_request_init( &requests[0], &client, HTTP_POST, request_uris[0], HTTP_1_1 );
    http_request_write_header( &requests[0], &header[0], 4 );
    http_request_write_end_header( &requests[0] );
    http_request_write( &requests[0], (uint8_t*)send_packet_buffer, strlen(send_packet_buffer) );
    result = http_request_flush( &requests[0] );
    if ( result != WICED_SUCCESS )
    {
        WPRINT_APP_INFO( (" POST request flush failed\n") );
    }
    else
    {
        result = wiced_rtos_get_semaphore(&requestSemaphore,7000);
        if ( result != WICED_SUCCESS )
            WPRINT_APP_DEBUG( (" POST request timed out \n") );
        else
        {
            WPRINT_APP_DEBUG( ("\nPOST successful\n") );
        }
    }
}
static void event_handler( http_client_t* client, http_event_t event, http_response_t* response )
{
    switch( event )
    {
        case HTTP_CONNECTED:
            break;
        case HTTP_DISCONNECTED:
        {
            got_disconnected = WICED_TRUE;
            is_connected_http = WICED_FALSE;
            break;
        }
        case HTTP_DATA_RECEIVED:
        {
            // set semaphore
            wiced_rtos_set_semaphore(&requestSemaphore);
        break;
        }
        default:
        break;
    }
}

Hello,

When I'm trying to connect to the Azure IOT hub server with AMQP functions, the program freezes and then restarts (not all the time) when it's calling the following function:

( After reboot, the program no longer has this problem. And it happens again on a new connection on the same device ).

WICED SKD : 5.1.0

wiced_result_t wiced_generic_start_tls_with_ciphers( wiced_tls_context_t* tls_context, void* referee, wiced_tls_endpoint_type_t type, wiced_tls_certificate_verification_t verification, const cipher_suite_t* cipher_list[], tls_transport_protocol_t transport_protocol )

{

}

and more precisely in the loop below :

    do

    {

        uint64_t curr_time;

        if (type == WICED_TLS_AS_SERVER)

        {

result = ssl_handshake_server_async( &tls_context->context );

if ( result != TLS_SUCCESS )

{

WPRINT_SECURITY_INFO(( "Error with TLS server handshake\n" ));

goto exit_with_inited_context;

}

        }

        else

        {

result = ssl_handshake_client_async( &tls_context->context );

if ( result != TLS_SUCCESS )

{

WPRINT_SECURITY_INFO(( "Error with TLS client handshake %u\n", (unsigned int)result ));

goto exit_with_inited_context;

}

        }

        /* break out if stuck */

        curr_time = tls_host_get_time_ms();

        if ( curr_time - start_time > MAX_HANDSHAKE_WAIT )

        {

WPRINT_SECURITY_INFO(( "Timeout in SSL handshake\n" ));

result = TLS_HANDSHAKE_TIMEOUT;

goto exit_with_inited_context;

        }

        /* if no state change then wait on client */

        if ( prev_state == tls_context->context.state )

        {

host_rtos_delay_milliseconds( 10 );

        }

        else /* otherwise process next state with no delay */

        {

prev_state = tls_context->context.state;

        }

    } while ( tls_context->context.state != SSL_HANDSHAKE_OVER );

    return WICED_SUCCESS;

I have an impression that during the different tests of the enumerator below (TLS STATES), the test blocks on number 3:

typedef enum

{

    SSL_HELLO_REQUEST,

    SSL_CLIENT_HELLO,

    SSL_SERVER_HELLO,

    SSL_SERVER_CERTIFICATE,

    SSL_SERVER_KEY_EXCHANGE,

    SSL_CERTIFICATE_REQUEST,

    SSL_SERVER_HELLO_DONE,

    SSL_CLIENT_CERTIFICATE,

    SSL_CLIENT_KEY_EXCHANGE,

    SSL_CERTIFICATE_VERIFY,

    SSL_CLIENT_CHANGE_CIPHER_SPEC,

    SSL_CLIENT_FINISHED,

    SSL_SERVER_CHANGE_CIPHER_SPEC,

    SSL_SERVER_FINISHED,

    SSL_FLUSH_BUFFERS,

    SSL_HANDSHAKE_OVER

} tls_states_t;

Can you explain the reason for this and help me to solve the problem ?