diff --git a/examples/FirmwareUpdate/FirmwareUpdate.ino b/examples/FirmwareUpdate/FirmwareUpdate.ino
index e9e4002..a129118 100644
--- a/examples/FirmwareUpdate/FirmwareUpdate.ino
+++ b/examples/FirmwareUpdate/FirmwareUpdate.ino
@@ -41,7 +41,7 @@ uint8_t updateFirmware(){
     Serial.print('.');
     Serial.flush();
     delay(2000);
-    if((sakuraio.getConnectionStatus() & 0x80) != 0x00){
+    if((sakuraio.getConnectionStatus() & SAKURAIO_CONNECTION_STATUS_MASK) != 0x00){
       break;
     }
   }
diff --git a/examples/GY-521/GY-521.ino b/examples/GY-521/GY-521.ino
index 4dd18c7..65a53ad 100644
--- a/examples/GY-521/GY-521.ino
+++ b/examples/GY-521/GY-521.ino
@@ -2,7 +2,7 @@
 // This code based on arduino playground and URL below (http://cranberrytree.blogspot.jp/2014/06/gy-521mpu-6050.html)
 /**
  * Channel definitions in Sakura IoT Platform
- * 
+ *
  * Channel 0: Temperature in celsius
  * Channel 1: Accelerometer X (G)
  * Channel 2: Accelerometer Y
@@ -86,7 +86,7 @@ void setup() {
 
     Serial.print("Waiting to come online");
     for (;;) {
-        if ((sakuraio.getConnectionStatus() & 0x80) == 0x80) {
+        if ((sakuraio.getConnectionStatus() & SAKURAIO_CONNECTION_STATUS_MASK) != 0x00) {
             Serial.println(" connected");
             break;
         }
diff --git a/examples/HDC1000/HDC1000.ino b/examples/HDC1000/HDC1000.ino
index ce56c4f..fb2d399 100644
--- a/examples/HDC1000/HDC1000.ino
+++ b/examples/HDC1000/HDC1000.ino
@@ -11,7 +11,7 @@ void setup() {
   Serial.begin(9600);
   Serial.print("Waiting to come online");
   for(;;){
-    if( (sakuraio.getConnectionStatus() & 0x80) == 0x80 ) break;
+    if( (sakuraio.getConnectionStatus() & SAKURAIO_CONNECTION_STATUS_MASK) != 0x00 ) break;
     Serial.print(".");
     delay(1000);
   }
diff --git a/examples/SB412A/SB412A.ino b/examples/SB412A/SB412A.ino
index 07b873f..a483746 100644
--- a/examples/SB412A/SB412A.ino
+++ b/examples/SB412A/SB412A.ino
@@ -12,7 +12,7 @@ void setup()
   Serial.print("Waiting to come online");
   Serial.begin(9600);
   for (;;) {
-    if ( (sakuraio.getConnectionStatus() & 0x80) == 0x80 ) break;
+    if ( (sakuraio.getConnectionStatus() & SAKURAIO_CONNECTION_STATUS_MASK) != 0x00 ) break;
     Serial.print(".");
     delay(100);
   }
diff --git a/examples/Shell/commands.ino b/examples/Shell/commands.ino
index e060f70..57f26ce 100644
--- a/examples/Shell/commands.ino
+++ b/examples/Shell/commands.ino
@@ -24,7 +24,7 @@ void cmd_serial(int argc, char **argv){
 void cmd_status(int argc, char **argv){
   uint8_t ret = sakuraio.getConnectionStatus();
 
-  if((ret & 0x80) == 0x80){
+  if((ret & SAKURAIO_CONNECTION_STATUS_MASK) != 0x00){
     Serial.println("Online");
   }else{
     Serial.println("Offline");
diff --git a/examples/Standard/Standard.ino b/examples/Standard/Standard.ino
index 4569725..e994a19 100644
--- a/examples/Standard/Standard.ino
+++ b/examples/Standard/Standard.ino
@@ -7,7 +7,7 @@ void setup() {
   Serial.begin(9600);
   Serial.print("Waiting to come online");
   for(;;){
-    if( (sakuraio.getConnectionStatus() & 0x80) == 0x80 ) break;
+    if( (sakuraio.getConnectionStatus() & SAKURAIO_CONNECTION_STATUS_MASK) != 0x00 ) break;
     Serial.print(".");
     delay(1000);
   }
diff --git a/src/SakuraIO.h b/src/SakuraIO.h
index 5fd6dc3..f04ac13 100644
--- a/src/SakuraIO.h
+++ b/src/SakuraIO.h
@@ -3,6 +3,8 @@
 
 #include <SakuraIO/commands.h>
 
+#define SAKURAIO_CONNECTION_STATUS_MASK (0x80)
+
 class SakuraIO
 {
 protected: