diff --git a/src/ExtensionIOXL9555.hpp b/src/ExtensionIOXL9555.hpp
index b56dc06..01e6d09 100644
--- a/src/ExtensionIOXL9555.hpp
+++ b/src/ExtensionIOXL9555.hpp
@@ -27,7 +27,7 @@
  * @date      2022-12-27
  *
  */
-
+#pragma once
 
 #include "REG/XL9555Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/ExtensionSPI.tpp b/src/ExtensionSPI.tpp
index 6c67c16..2c002cc 100644
--- a/src/ExtensionSPI.tpp
+++ b/src/ExtensionSPI.tpp
@@ -27,6 +27,7 @@
  * @date      2024-01-19
  *
  */
+#pragma once
 
 #include "SensorLib.h"
 
diff --git a/src/REG/BMA423Constants.h b/src/REG/BMA423Constants.h
index a23cd55..d969cbd 100644
--- a/src/REG/BMA423Constants.h
+++ b/src/REG/BMA423Constants.h
@@ -1,5 +1,5 @@
-#ifndef __BAM423_CONSTANT_H_
-#define  __BAM423_CONSTANT_H_
+#pragma once
+
 
 #define BMA423_SLAVE_ADDRESS             (0x19)
 
@@ -724,5 +724,3 @@ static const unsigned char bma423_config_file[] = {
 #define BMA423_WAKEUP_INT               (0x20)
 #define BMA423_ANY_NO_MOTION_INT        (0x40)
 #define BMA423_ERROR_INT                (0x80)
-
-#endif
\ No newline at end of file
diff --git a/src/REG/LTR533Constants.h b/src/REG/LTR533Constants.h
index fe0da44..9df1278 100644
--- a/src/REG/LTR533Constants.h
+++ b/src/REG/LTR533Constants.h
@@ -26,6 +26,7 @@
  * @author    Lewis He (lewishe@outlook.com)
  * @date      2023-09-09
  */
+#pragma once
 
 #define LTR553_SLAVE_ADDRESS            (0x23)
 
diff --git a/src/SensorBMA423.hpp b/src/SensorBMA423.hpp
index 4aff620..7adc9de 100644
--- a/src/SensorBMA423.hpp
+++ b/src/SensorBMA423.hpp
@@ -28,7 +28,7 @@
  * @note      Most source code references come from the https://github.com/boschsensortec/BMA423-Sensor-API
  *            Simplification for Arduino
  */
-
+#pragma once
 
 #include "REG/BMA423Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/SensorBMM150.hpp b/src/SensorBMM150.hpp
index 35977f6..b07cf10 100644
--- a/src/SensorBMM150.hpp
+++ b/src/SensorBMM150.hpp
@@ -28,6 +28,7 @@
  * @note      Most source code references come from the https://github.com/boschsensortec/BMM150-Sensor-API
  *            Simplification for Arduino
  */
+#pragma once
 
 #include "bosch/common/bosch_interfaces.h"
 #include "bosch/BMM150/bmm150.h"
diff --git a/src/SensorCM32181.hpp b/src/SensorCM32181.hpp
index f7573fc..63bc874 100644
--- a/src/SensorCM32181.hpp
+++ b/src/SensorCM32181.hpp
@@ -27,7 +27,7 @@
  * @date      2023-04-14
  *
  */
-
+#pragma once
 
 #include "REG/CM32181Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/SensorDRV2605.hpp b/src/SensorDRV2605.hpp
index 26dee4c..87eef56 100644
--- a/src/SensorDRV2605.hpp
+++ b/src/SensorDRV2605.hpp
@@ -27,6 +27,7 @@
  * @date      2023-04-03
  * @note      Source code from https://github.com/adafruit/Adafruit_DRV2605_Library
  */
+#pragma once
 
 #include "REG/DRV2605Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/SensorLTR553.hpp b/src/SensorLTR553.hpp
index 604019a..ef1d5cc 100644
--- a/src/SensorLTR553.hpp
+++ b/src/SensorLTR553.hpp
@@ -27,6 +27,8 @@
  * @date      2023-09-09
  *
  */
+#pragma once
+
 #include "REG/LTR533Constants.h"
 #include "SensorCommon.tpp"
 
diff --git a/src/SensorPCF85063.hpp b/src/SensorPCF85063.hpp
index 2534c6e..0fcdfc8 100644
--- a/src/SensorPCF85063.hpp
+++ b/src/SensorPCF85063.hpp
@@ -27,8 +27,7 @@
  * @date      2023-09-07
  *
  */
-
-
+#pragma once
 #include "REG/PCF85063Constants.h"
 #include "SensorCommon.tpp"
 #include "SensorRTC.h"
diff --git a/src/SensorPCF8563.hpp b/src/SensorPCF8563.hpp
index f7ab0ba..f48835e 100644
--- a/src/SensorPCF8563.hpp
+++ b/src/SensorPCF8563.hpp
@@ -27,7 +27,7 @@
  * @date      2022-12-09
  *
  */
-
+#pragma once
 
 #include "REG/PCF8563Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/SensorQMC6310.hpp b/src/SensorQMC6310.hpp
index 2506949..f044072 100644
--- a/src/SensorQMC6310.hpp
+++ b/src/SensorQMC6310.hpp
@@ -27,7 +27,7 @@
  * @date      2022-10-16
  *
  */
-
+#pragma once
 
 #include "REG/QMC6310Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/SensorQMI8658.hpp b/src/SensorQMI8658.hpp
index b04414f..99cc829 100644
--- a/src/SensorQMI8658.hpp
+++ b/src/SensorQMI8658.hpp
@@ -27,6 +27,7 @@
  * @date      2022-10-16
  *
  */
+#pragma once
 
 #include "REG/QMI8658Constants.h"
 #include "SensorCommon.tpp"
diff --git a/src/SensorRTC.h b/src/SensorRTC.h
index 1f3a72c..915748e 100644
--- a/src/SensorRTC.h
+++ b/src/SensorRTC.h
@@ -27,6 +27,8 @@
  * @date      2023-09-07
  *
  */
+#pragma once
+
 #ifdef ARDUINO
 #include <Arduino.h>
 #else
diff --git a/src/SensorWireHelper.h b/src/SensorWireHelper.h
index 1f94d04..bfd1131 100644
--- a/src/SensorWireHelper.h
+++ b/src/SensorWireHelper.h
@@ -27,6 +27,7 @@
  * @date      2023-09-10
  *
  */
+#pragma once
 
 #if defined(ARDUINO)
 #include <Arduino.h>
diff --git a/src/TouchDrvCHSC5816.hpp b/src/TouchDrvCHSC5816.hpp
index 78062b9..31efa43 100644
--- a/src/TouchDrvCHSC5816.hpp
+++ b/src/TouchDrvCHSC5816.hpp
@@ -27,7 +27,7 @@
  * @date      2023-04-12
  *
  */
-
+#pragma once
 
 #include "REG/CHSC5816Constants.h"
 #include "TouchDrvInterface.hpp"
diff --git a/src/TouchDrvCSTXXX.hpp b/src/TouchDrvCSTXXX.hpp
index 96543d8..bb54164 100644
--- a/src/TouchDrvCSTXXX.hpp
+++ b/src/TouchDrvCSTXXX.hpp
@@ -28,6 +28,8 @@
  * @date      last 2023-10-05
  *
  */
+#pragma once
+
 #include "REG/CSTxxxConstants.h"
 #include "touch/TouchClassCST226.h"
 #include "touch/TouchClassCST816.h"
diff --git a/src/TouchDrvFT6X36.hpp b/src/TouchDrvFT6X36.hpp
index 71b7065..e8fed40 100644
--- a/src/TouchDrvFT6X36.hpp
+++ b/src/TouchDrvFT6X36.hpp
@@ -27,7 +27,7 @@
  * @date      2023-04-01
  *
  */
-
+#pragma once
 
 #include "REG/FT6X36Constants.h"
 #include "TouchDrvInterface.hpp"
diff --git a/src/TouchDrvGT911.hpp b/src/TouchDrvGT911.hpp
index 87ce768..f3cc801 100644
--- a/src/TouchDrvGT911.hpp
+++ b/src/TouchDrvGT911.hpp
@@ -27,7 +27,7 @@
  * @date      2023-04-12
  *
  */
-
+#pragma once
 
 #include "REG/GT911Constants.h"
 #include "TouchDrvInterface.hpp"
diff --git a/src/touch/TouchClassCST226.h b/src/touch/TouchClassCST226.h
index 31a0e8b..7d1ceaa 100644
--- a/src/touch/TouchClassCST226.h
+++ b/src/touch/TouchClassCST226.h
@@ -26,6 +26,7 @@
  * @author    Lewis He (lewishe@outlook.com)
  * @date      2023-10-06
  */
+#pragma once
 
 #include "../TouchDrvInterface.hpp"
 #include "../SensorCommon.tpp"
diff --git a/src/touch/TouchClassCST816.h b/src/touch/TouchClassCST816.h
index d0ea044..e261a1a 100644
--- a/src/touch/TouchClassCST816.h
+++ b/src/touch/TouchClassCST816.h
@@ -26,6 +26,8 @@
  * @author    Lewis He (lewishe@outlook.com)
  * @date      2023-10-06
  */
+#pragma once
+
 #include "../TouchDrvInterface.hpp"
 #include "../SensorCommon.tpp"
 #include "../SensorLib.h"