chapter update

SMARTHON · Nov 18, 2021 · d8ccd88 · d8ccd88
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diff --git a/docs/smartcity/chapter3.md b/docs/smartcity/chapter3.md
@@ -70,6 +70,7 @@ We need to get the Device ID and set the corresponding action.<BR><P>
 
 ![auto_fit](images/Ch3/Ch3_hardware.png)<P>
 
+*Pull the buzzer switch 'up' to disconnect the buzzer in this execrise*
 
 <span id="subtitle">Step 1: Connect WiFI</span><BR><P>
 Before we try to use WiFi Control function, we need to connect to the network, we have already know how to connect to the WiFi on the first chapter.

diff --git a/docs/smartcity/chapter4.md b/docs/smartcity/chapter4.md
@@ -39,6 +39,8 @@ We need to get the Device ID and set the corresponding action.<BR><P>
 * Connect LED to P0<BR><P>
 ![auto_fit](images/Ch4/Ch4_2_hardware.png)<P>
 
+*Pull the buzzer switch 'up' to disconnect the buzzer in this execrise*
+
 <span id="subtitle" >Step 1: Connect WiFi</span><BR><P>
 Before we try to use WiFi Control function, we need to connect to the network, we have already know how to connect to the WiFi on the first chapter.<P>
 ![auto_fit](images/Ch4/Ch4_2_p1.png)<P>

diff --git a/docs/smartcity/images/Ch3/Ch3_hardware.png b/docs/smartcity/images/Ch3/Ch3_hardware.png
diff --git a/docs/smartcity/images/Ch4/Ch4_2_hardware.png b/docs/smartcity/images/Ch4/Ch4_2_hardware.png