DFU project

[František]

I try to create coap server project and it should by  updateable by DFU. I merge project simple coap server and thread dfu client, and I keep  instructions in documentation to build it and run DFU. But Server doesnt response to coap requests and when I start multicast DFU process server is not updated. and when I try to start unicast DFU it waiting to promote a router. 

[František]

This is coap library which is best to use? 

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_tz_v3.1.0%2Fgroup__api-coap-group.html&cp=5_3_5_0_0_6_3

[František]

We wanna use it for thousands devices an update firmware without DFU will not possible. 

[František]

If I understand it, I should use coap library which is used in DFU project? 

[Marjeris Romero]

Hi Fran,

That's the buildt-in OpenThread coap library, the external coap library (the one used by the thread DFU client) is this one: https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.iotsdk.v0.9.0%2Flib_iot_coap.html

[František]

I use nRF5_SDK_for_Thread_and_Zigbee_v3.2.0_9fade31

I try example to DFU thread client and I add turn on LED. DFU was sucessfull. Next I add CoAP resources to code and it not start.

This is terminal output:

D:\IS\nRF5_SDK_for_Thread_and_Zigbee_v3.2.0_9fade31\examples\thread\dfu>nrfutil dfu thread -f -pkg app_dfu_package.zip -p COM12 --channel 11 --panid 43981
Address not specified. Using ff03::1 (all Thread nodes)
Using connectivity board at serial port: COM12
Flashing connectivity firmware...
Connectivity firmware flashed.
Waiting for NCP to promote to a router...
Thread DFU server is running... Press <Ctrl + D> to stop.

edited file: coap_dfu.c

added code:

#define MY_APP_RESOURCE_HELLO "hello"
coap_resource_t coap_resource_hello;

#define MY_APP_RESOURCE_READ "read"
coap_resource_t coap_resource_read;

#define MY_APP_RESOURCE_WRITE "write"
coap_resource_t coap_resource_write;

static void hello_request_callback(coap_resource_t * p_resource, coap_message_t * p_request)
{
NRF_LOG_INFO("Hello packet");

coap_message_t * p_response = NULL;

if (!is_addr_multicast(&p_request->local))
{
p_response = empty_reset_response_create(p_request);
}

// Send response, if created.
if (p_response != NULL)
{
coap_dfu_message_send(p_response);
}

}

static void read_request_callback(coap_resource_t * p_resource, coap_message_t * p_request)
{
NRF_LOG_INFO("Read packet");

coap_message_t * p_response = NULL;

if (!is_addr_multicast(&p_request->local))
{
p_response = empty_reset_response_create(p_request);
}

// Send response, if created.
if (p_response != NULL)
{
coap_dfu_message_send(p_response);
}

}

static void write_request_callback(coap_resource_t * p_resource, coap_message_t * p_request)
{
NRF_LOG_INFO("Write packet");

coap_message_t * p_response = NULL;

if (!is_addr_multicast(&p_request->local))
{
p_response = empty_reset_response_create(p_request);
}

// Send response, if created.
if (p_response != NULL)
{
coap_dfu_message_send(p_response);
}

}


static uint32_t MyAppCoapResource_init()
{
    uint32_t err_code = NRF_SUCCESS;
    
    do
    {
        err_code = coap_resource_create(&coap_resource_hello, MY_APP_RESOURCE_HELLO);
        err_code = coap_resource_create(&coap_resource_read, MY_APP_RESOURCE_READ);
        err_code = coap_resource_create(&coap_resource_write, MY_APP_RESOURCE_WRITE);
        if (err_code != NRF_SUCCESS)
        {
            break;
        }

        coap_resource_hello.permission = (COAP_PERM_POST | COAP_PERM_GET);
        coap_resource_hello.callback = hello_request_callback;

        coap_resource_read.permission = (COAP_PERM_POST | COAP_PERM_GET);
        coap_resource_read.callback = read_request_callback;

        coap_resource_write.permission = (COAP_PERM_POST | COAP_PERM_GET);
        coap_resource_write.callback = write_request_callback;

        NRF_LOG_INFO("Endpoints initialized");

    } while (0);

    return err_code;
}

//upgrade this existing function

uint32_t coap_dfu_init(const void * p_context)
{
    uint32_t err_code;

    do
    {
        memset(&m_coap_dfu_ctx, 0 , sizeof(m_coap_dfu_ctx));

        err_code = coap_protocol_init(p_context);
        if (err_code != NRF_SUCCESS)
        {
            break;
        }

        err_code = MyAppCoapResource_init();
        if (err_code != NRF_SUCCESS)
        {
            break;
        }

        err_code = endpoints_init(&m_coap_dfu_ctx);
        if (err_code != NRF_SUCCESS)
        {
            break;
        }

        nrf_dfu_settings_init(false);
        nrf_dfu_req_handler_init(dfu_observer);

        background_dfu_state_init(&m_dfu_ctx);

        app_timer_create(&m_send_timer, APP_TIMER_MODE_SINGLE_SHOT, delayed_send_handler);
        app_timer_create(&m_reset_timer, APP_TIMER_MODE_SINGLE_SHOT, delayed_reset_handler);
        app_timer_create(&m_coap_delayed_error_handling_timer, APP_TIMER_MODE_SINGLE_SHOT, coap_delayed_error_handler);

        APP_SCHED_INIT(SCHED_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);
    } while (0);

    return err_code;
}