diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
index a60a30020..6de86b515 100644
--- a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
+++ b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
@@ -1,4 +1,4 @@
 # Sphinx build info version 1
 # This file records the configuration used when building these files. When it is not found, a full rebuild will be done.
-config: a9b7137a0a42ab0ffd1d3b1ac6a282c7
+config: 0ae31f3b963539f9887a19e6d57e57b6
 tags: 62a1e7829a13fc7881b6498c52484ec0
diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
index 91210eadc..a5635ff0e 100644
--- a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
+++ b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
@@ -714,6 +714,9 @@ Right DC Motors spin clockwise
                </p>
               </td>
               <td>
+               <p>
+                NC
+               </p>
               </td>
              </tr>
              <tr class="row-odd">
@@ -871,7 +874,7 @@ Right DC Motors spin clockwise
            </div>
           </div>
           <p>
-           The onDataReceived() and onDataSent() are two call-bacl functions that get evoked on each corresponding event.
+           The onDataReceived() and onDataSent() are two call-back functions that get evoked on each corresponding event.
           </p>
           <div class="highlight-c notranslate">
            <div class="highlight">