diff --git a/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Basics/WS2812B_Basics.ino b/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Basics/WS2812B_Basics.ino
index 7c927385..4e245b64 100644
--- a/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Basics/WS2812B_Basics.ino
+++ b/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Basics/WS2812B_Basics.ino
@@ -6,7 +6,9 @@
 
 #include "WS2812B.h"
 
+#define TOTAL_NUM_OF_LED 16
 #define NUM_OF_LEDS 8
+
 // There are mutiple choice of SPI_MOSI pins depends on different boards. The default is SPI_MOSI/SPI1_MOSI
 // AMB21/AMB22              pin 11 /  pin21
 // AMB23                    pin 9  /  pin 4
@@ -14,7 +16,7 @@
 // AW-CU488 ThingPlus       pin 1  /  pin 14
 // AMB25/AMB26              pin 17 /  pin 3
 
-WS2812B led(SPI_MOSI, NUM_OF_LEDS);
+WS2812B led(SPI_MOSI, TOTAL_NUM_OF_LED);
 
 void setup() {
     Serial.begin(115200);
diff --git a/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Patterns/WS2812B_Patterns.ino b/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Patterns/WS2812B_Patterns.ino
index c5829b83..f639f74e 100644
--- a/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Patterns/WS2812B_Patterns.ino
+++ b/Arduino_package/hardware/libraries/WS2812B/examples/WS2812B_Patterns/WS2812B_Patterns.ino
@@ -6,6 +6,7 @@
 
 #include "WS2812B.h"
 
+#define TOTAL_NUM_OF_LED 16
 #define NUM_OF_LEDS 8
 
 uint32_t rgbhue;
@@ -17,7 +18,7 @@ uint32_t rgbhue;
 // AW-CU488 ThingPlus       pin 1  /  pin 14
 // AMB25/AMB26              pin 17 /  pin 3
 
-WS2812B led(SPI_MOSI,NUM_OF_LEDS);
+WS2812B led(SPI_MOSI,TOTAL_NUM_OF_LED);
 
 void setup() {
     Serial.begin(115200);
diff --git a/Arduino_package/hardware/libraries/WS2812B/src/WS2812B.cpp b/Arduino_package/hardware/libraries/WS2812B/src/WS2812B.cpp
index a760ec6c..acec214a 100644
--- a/Arduino_package/hardware/libraries/WS2812B/src/WS2812B.cpp
+++ b/Arduino_package/hardware/libraries/WS2812B/src/WS2812B.cpp
@@ -126,7 +126,7 @@ void WS2812B::setLEDCount (uint16_t num_leds) {
     _led_array = (pixel*)realloc(_led_array, num_leds*sizeof(pixel));
     //Check if memory allocation is successful
     if (_led_array == NULL) {
-        printf("Insufficient memory avaliable");
+        printf("Insufficient memory avaliable \r\n");
         _num_leds = 0;
     } else {
         memset(_led_array, 0, num_leds*sizeof(pixel));
@@ -137,7 +137,7 @@ void WS2812B::setLEDCount (uint16_t num_leds) {
 void WS2812B::setPixelColor(uint16_t led_Number, uint8_t rColor, uint8_t gColor, uint8_t bColor) {
     //Verify that memory was successfully allocated
     if (_led_array == NULL) {
-        printf("set LED count first");
+        printf("set LED count first \r\n");
         return;
     }
     if (led_Number < _num_leds) {
@@ -145,7 +145,7 @@ void WS2812B::setPixelColor(uint16_t led_Number, uint8_t rColor, uint8_t gColor,
         _led_array[led_Number].green = gColor;
         _led_array[led_Number].blue = bColor;
     } else {
-        printf("This LED does not exist");
+        printf("This LED does not exist \r\n");
     }
 }