diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/.buildinfo
index fb3795307..62fcab9a9 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: 228dcdcf73dfe0d9a44116c7f58c8906
+config: 3b3a7217749032a6826ca7e57e6c67b4
 tags: 62a1e7829a13fc7881b6498c52484ec0
diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf
index b66e50561..80bad538b 100644
Binary files a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf and b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/esp-idf_espnow_rc-car.pdf differ
diff --git a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
index 303867334..5fedf0364 100644
--- a/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
+++ b/ESP-IDF_Robot/tutorial/docs/build/simplepdf/index.html
@@ -244,14 +244,14 @@ Similarly,
 Changing PWM on each channel determines the speed and direction of the RC car.
            </p>
            <p>
-            The following images illustrate various PWM duty cycles registered by oscilloscope (duty cycles 0%, 50% and 95%, resp.).
+            The following images illustrate various PWM duty cycles registered by oscilloscope (duty cycles 0%, 48% and 91%, resp.).
            </p>
            <figure class="align-default" id="id1">
             <img alt="_images/ESP-IDF_Robot_PWM_Duty-0.bmp" src="_images/ESP-IDF_Robot_PWM_Duty-0.bmp"/>
             <figcaption>
              <p>
               <span class="caption-text">
-               DC Motor PWM duty cycle 0%.
+               DC Motor PWM duty cycle 0%
               </span>
               <a class="headerlink" href="#id1" title="Link to this image">
                &para;
@@ -259,8 +259,19 @@ Changing PWM on each channel determines the speed and direction of the RC car.
              </p>
             </figcaption>
            </figure>
-           <img alt="_images/ESP-IDF_Robot_PWM_Duty-50.bmp" src="_images/ESP-IDF_Robot_PWM_Duty-50.bmp"/>
-           <img alt="_images/ESP-IDF_Robot_PWM_Duty-95.bmp" src="_images/ESP-IDF_Robot_PWM_Duty-95.bmp"/>
+           <figure class="align-default" id="id2">
+            <img alt="_images/ESP-IDF_Robot_PWM_Duty-50.bmp" src="_images/ESP-IDF_Robot_PWM_Duty-50.bmp"/>
+            <figcaption>
+             <p>
+              <span class="caption-text">
+               DC Motor PWM duty cycle 47.6%
+              </span>
+              <a class="headerlink" href="#id2" title="Link to this image">
+               &para;
+              </a>
+             </p>
+            </figcaption>
+           </figure>
            <br/>
            <br/>
            <br/>