diff --git a/example/lightdetection_serial/lightdetection_serial.ino b/example/lightdetection_serial/lightdetection_serial.ino
index 65b379f..d9c8b75 100644
--- a/example/lightdetection_serial/lightdetection_serial.ino
+++ b/example/lightdetection_serial/lightdetection_serial.ino
@@ -1,3 +1,8 @@
+/****************************************************
+* If you have selected ESP32-S3-USB_OTG as the board, 
+* change Tools->USB_Mode to "Hardware CDC and JTAG".
+*****************************************************/
+
 #include <Dezibot.h>
 
 Dezibot dezibot = Dezibot();
@@ -13,3 +18,4 @@ void loop() {
   Serial.println(dezibot.lightDetection.getValue(DL_FRONT));
   delay(1000);
 }
+
diff --git a/example/motion_indicating/motion_indicating.ino b/example/motion_indicating/motion_indicating.ino
index 007c93c..9b6022d 100644
--- a/example/motion_indicating/motion_indicating.ino
+++ b/example/motion_indicating/motion_indicating.ino
@@ -2,10 +2,8 @@
 Dezibot dezibot = Dezibot(); 
 void setup() {   
     dezibot.begin();
-   Serial.begin(9600); 
 }  
 void loop() {   
-    Serial.println("bla");   
     dezibot.motion.move(1000);   
     dezibot.multiColorLight.setLed(BOTTOM, RED);   
     delay(2000);   
@@ -17,4 +15,4 @@ void loop() {
     delay(2000);   
     dezibot.multiColorLight.turnOffLed();   
     delay(2000); 
-}
\ No newline at end of file
+}
diff --git a/example/motion_minimum/motion_minimum.ino b/example/motion_minimum/motion_minimum.ino
index e376753..96955e4 100644
--- a/example/motion_minimum/motion_minimum.ino
+++ b/example/motion_minimum/motion_minimum.ino
@@ -1,10 +1,8 @@
 #include <Dezibot.h>
 
 Dezibot dezibot = Dezibot();
-const uint8_t MYFOO = 10;
 void setup() {
-    dezibot.begin();
-    
+    dezibot.begin();   
 }
 
 void loop() {
@@ -17,3 +15,4 @@ delay(1000);
 dezibot.motion.stop();
 delay(1000);
 }
+