diff --git a/main/main.c b/main/main.c
index 8afc49c..29863a2 100644
--- a/main/main.c
+++ b/main/main.c
@@ -119,7 +119,7 @@ static const uint32_t CHUNK_SIZE = 1024;
 static const uint32_t MSG_SIZE = 256;
 static const char * uploadPath = "/upload";
 static const char * server = "192.168.1.107:3001";
-static const char * boundary = "01234567899876543210";
+static const char * boundary = "boundary";
 
 static void post_data(camera_fb_t * pic){
    char url[128];
@@ -129,11 +129,11 @@ static void post_data(camera_fb_t * pic){
    esp_http_client_handle_t client = esp_http_client_init(&config);
    esp_http_client_set_method(client, HTTP_METHOD_POST);
 
-   char header[CHUNK_SIZE];
    char head[MSG_SIZE];
    char tail[MSG_SIZE];
 
-   sprintf(head, "--%s\r\n"
+   sprintf(head,
+         "--%s\r\n"
          "Content-Disposition: form-data; name=\"photo\"; filename=\"esp32.jpg\"\r\n"
          "Content-Type: image/jpeg\r\n\r\n", boundary);
    sprintf(tail, "\r\n--%s--\r\n", boundary);
@@ -142,26 +142,31 @@ static void post_data(camera_fb_t * pic){
    char tmpStr[MSG_SIZE];
 
    // send header so that the server knows what to do with chunks after this
-   sprintf(header, "POST %s HTTP/1.1\r\nHost: %s\r\n"
-         "Content-Length: %u\r\n"
-         "Expect: 100-continue\r\n"
-         "Accept: */*\r\n"
-         "Content-Type: multipart/form-data; boundary=%s\r\n\r\n"
-         , uploadPath, server, pic->len, boundary);
-   ESP_LOGI(TAG, "header to be sent:\n%s", header);
+   sprintf(tmpStr, "%u", totalLen);
+   esp_http_client_set_header(client, "Content-Length", tmpStr);
+   ESP_LOGI(TAG, "Content-Length: %s", tmpStr);
 
-   esp_http_client_open(client, totalLen);
+   sprintf(tmpStr, "multipart/form-data; boundary=%s", boundary);
+   esp_http_client_set_header(client, "Content-Type", tmpStr);
+   ESP_LOGI(TAG, "Content-Type: %s", tmpStr);
+   esp_http_client_set_header(client, "Accept", "*/*");
+   esp_http_client_set_header(client, "Expect", "100-continue");
+   
+   err_t err;
+   err = esp_http_client_open(client, totalLen);
+   if (err != ESP_OK) {
+      ESP_LOGE(TAG, "esp_http_client_open failed");
+      esp_http_client_cleanup(client);
+      return;
+   }
 
-   // send the first header
-   esp_http_client_write(client, header, strlen(header));
-   vTaskDelay(100 / portTICK_RATE_MS);
+   sprintf(tmpStr, "\r\n");
+   esp_http_client_write(client, tmpStr, strlen(tmpStr));
+
+   vTaskDelay(10 / portTICK_RATE_MS);
    esp_http_client_fetch_headers(client);
    ESP_LOGI(TAG, "code %d", esp_http_client_get_status_code(client));
 
-   /* char resp[CHUNK_SIZE]; */
-   /* esp_http_client_read(client, resp, CHUNK_SIZE); */
-   /* ESP_LOGI(TAG, "%s", resp); */
-
    // send head
    esp_http_client_write(client, head, strlen(head));
    ESP_LOGI(TAG, "%s", (char *)head);