RE: record_url SDK example using T4T instead of T2T?

jp_is_my_name — Thu, 20 May 2021 14:40:11 GMT

I got it working. Posting simplified code below (but note I'm using SDK 14).

// In sdk_config.h add this
    #define NFC_NDEF_URI_MSG_ENABLED 1
    #define NFC_NDEF_MSG_ENABLED     1
    #define NFC_NDEF_RECORD_ENABLED 1
    #define NFC_NDEF_URI_REC_ENABLED 1

    #define NFC_NDEF_MSG_TAG_TYPE   4U      //otherwise default is 2 and format will be wrong
//////////////////////////////////////////////////

// Type 4 URI URL tag
static const uint8_t m_url[] = "foo.com";
static uint8_t m_buff[128];

static void nfc_tag_callback(void          * context,
                         nfc_t4t_event_t event,
                         const uint8_t * data,
                         size_t dataLength,
                         uint32_t flags)
{

    switch (event)
    {
        case NFC_T4T_EVENT_FIELD_ON:    //1
            break;

        case NFC_T4T_EVENT_FIELD_OFF:   //2
            break;

        case NFC_T4T_EVENT_NDEF_READ:   //3
            break;

        default:
            break;
    }
}

void startTag()
{
    uint32_t err_code;

    nfc_t4t_setup(nfc_tag_callback, NULL);

    uint32_t size=sizeof(m_buff);
    err_code = nfc_uri_msg_encode(NFC_URI_HTTPS_WWW,
        m_url,
        sizeof(m_url)-1,
        m_buff,
        &size);

    /* note: m_buff must be persistent */
    err_code =
        nfc_t4t_ndef_staticpayload_set(m_buff,sizeof(m_buff));

    nfc_t4t_emulation_start();
}

void stopTag(void)
{
    nfc_t4t_emulation_stop();
    nfc_t4t_done();

}