ESP32 Forum

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python esptool.py --chip esp32 --port COM14 --baud 115200 write_flash -z 0xF0000 spiffs.bin

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void initialise_SPIFFS()
{
    ESP_LOGI(TAG, "Initializing SPIFFS");
    esp_vfs_spiffs_conf_t conf = {
      .base_path = "/spiffs",
      .partition_label = NULL,
      .max_files = 5,
      .format_if_mount_failed = true
    };

    // Use settings defined above to initialize and mount SPIFFS filesystem.
    // Note: esp_vfs_spiffs_register is an all-in-one convenience function.
    esp_err_t ret = esp_vfs_spiffs_register(&conf);

    if (ret != ESP_OK) {
        if (ret == ESP_FAIL) {
            ESP_LOGE(TAG, "Failed to mount or format filesystem");
        } else if (ret == ESP_ERR_NOT_FOUND) {
            ESP_LOGE(TAG, "Failed to find SPIFFS partition");
        } else {
            ESP_LOGE(TAG, "Failed to initialize SPIFFS (%s)", esp_err_to_name(ret));
        }
        return;
    }

    ret = esp_spiffs_info(NULL, &total, &used);
    if (ret != ESP_OK) {
        ESP_LOGE(TAG, "Failed to get SPIFFS partition information (%s)", esp_err_to_name(ret));
    } else {
        // SPIFFS set up a-ok
        SPIFFS_OK = true;
        // Check if files exist
        struct stat st;
        if (stat("/spiffs/dashboard.css", &st) == 0) {
            ESP_LOGI(TAG, "Found dashboard.css!");
        } else {
            ESP_LOGI(TAG, "Can't find dashboard.css!");
        }
        if (stat("/spiffs/index.htm", &st) == 0) {
            ESP_LOGI(TAG, "Found index.htm!");
        } else {
            ESP_LOGI(TAG, "Can't find index.htm!");
        }
        if (stat("/spiffs/scripts.js", &st) == 0) {
            ESP_LOGI(TAG, "Found scripts.js!");
        } else {
            ESP_LOGI(TAG, "Can't find scripts.js!");
        }
    }

}

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# Name,   Type, SubType, Offset,  Size, Flags
# Note: if you change the phy_init or app partition offset, make sure to change the offset in Kconfig.projbuild
nvs,      data, nvs,     0x9000,  0x6000,
phy_init, data, phy,     0xf000,  0x1000,
factory,  app,  factory, 0x10000, 1M,
storage,  data, spiffs, 0x210000 , 1M, 

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./mkspiffs.exe -c C:/z -b 4096 -p 256 -s 0x100000 spiffs.bin

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python $IDF_PATH/components/esptool_py/esptool/esptool.py --chip esp32 --port COM8 --baud 921600 write_flash -z 0x210000 spiffs.bin

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char *readFile(char *fname)
{
    int size, res;
    char *buf;
    struct stat st;

    if (stat(fname, &st) == 0) {
        size = st.st_size;
    } else {
        ESP_LOGE(TAG, " Error - cannot find file!");
        return NULL;
    }

    ESP_LOGI(TAG, " Opening file %s, size: %d", fname, size);

    FILE *fd = fopen(fname, "rb");
    if (fd == NULL) {
        ESP_LOGE(TAG, " Error opening file");
        return NULL;
    }
    
    if (size == 0) {
        ESP_LOGE(TAG, " Error - file size zero");
        return NULL;
    }

    buf = calloc(size, 1); // File buffer
    if (buf == NULL) {
        ESP_LOGE(TAG, " Error allocating read buffer");
        free(buf);
        fclose(fd);
        return NULL;
    }

    res = size;
    res = fread(buf, 1, size, fd);
    if (res <= 0) {
        ESP_LOGE(TAG, " Error reading from file");
    }
    else {
        ESP_LOGI(TAG, " %d bytes read", res);
        buf[res] = '\0';
    }

    return((char*)buf);

    res = fclose(fd);
    if (res) {
        ESP_LOGE(TAG, " Error closing file");
    }
} 

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esp_err_t index_get_handler(httpd_req_t *req)
{
    /* Send response with custom headers and body set as the
     * string passed in user context*/
    // Get the file to return
    const char* resp_str = (const char*) readFile("/spiffs/index.htm");
    // Set the response headers
    httpd_resp_set_hdr(req, "status", "200");
    httpd_resp_set_hdr(req, "content-type", "text/html; charset=UTF-8");
    httpd_resp_set_hdr(req, "server", "ESP32-10103");
    // Return the response
    httpd_resp_send(req, resp_str, strlen(resp_str));
    return ESP_OK;
}