diff --git a/src/SparkFun_SHTC3.cpp b/src/SparkFun_SHTC3.cpp
index faf6bf9..9030aca 100644
--- a/src/SparkFun_SHTC3.cpp
+++ b/src/SparkFun_SHTC3.cpp
@@ -28,7 +28,7 @@ SHTC3_Status_TypeDef SHTC3::sendCommand(SHTC3_MeasurementModes_TypeDef cmd)
 	return sendCommand((SHTC3_Commands_TypeDef)cmd);
 }
 
-SHTC3_Status_TypeDef SHTC3::abortUpdate(SHTC3_Status_TypeDef status, char *file, uint16_t line) // Sets the values to a known error state
+SHTC3_Status_TypeDef SHTC3::abortUpdate(SHTC3_Status_TypeDef status, const char *file, uint16_t line) // Sets the values to a known error state
 {
 	passRHcrc = false;
 	passTcrc = false;
@@ -41,7 +41,7 @@ SHTC3_Status_TypeDef SHTC3::abortUpdate(SHTC3_Status_TypeDef status, char *file,
 	return exitOp(status, file, line);
 }
 
-SHTC3_Status_TypeDef SHTC3::exitOp(SHTC3_Status_TypeDef status, char *file, uint16_t line)
+SHTC3_Status_TypeDef SHTC3::exitOp(SHTC3_Status_TypeDef status, const char *file, uint16_t line)
 {
 	lastStatus = status;
 	SHTC3_exitOp_Callback(status, _inProcess, file, line);
@@ -403,7 +403,9 @@ SHTC3_Status_TypeDef SHTC3::update()
 
 SHTC3_Status_TypeDef SHTC3::checkCRC(uint16_t packet, uint8_t cs)
 {
-	uint8_t data[2] = {((packet & 0xFF00) >> 8), ((packet & 0x00FF) >> 0)};
+	uint8_t upper = packet >> 8;
+	uint8_t lower = packet & 0x00FF;
+	uint8_t data[2] = {upper, lower};
 	uint8_t crc = 0xFF;
 	uint8_t poly = 0x31;
 
@@ -446,4 +448,4 @@ float SHTC3_raw2Percent(uint16_t RH)
 	return 100 * ((float)RH / 65535);
 }
 
-void SHTC3_exitOp_Callback(SHTC3_Status_TypeDef status, bool inProcess, char *file, uint16_t line) {} // Empty implementation. You can make your own implementation
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+void SHTC3_exitOp_Callback(SHTC3_Status_TypeDef status, bool inProcess, const char *file, uint16_t line) {} // Empty implementation. You can make your own implementation
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diff --git a/src/SparkFun_SHTC3.h b/src/SparkFun_SHTC3.h
index aa031fd..ebf66b2 100644
--- a/src/SparkFun_SHTC3.h
+++ b/src/SparkFun_SHTC3.h
@@ -60,9 +60,9 @@ class SHTC3
 	bool _isAsleep;		// Used to indicate if a wake() command is needed before talking
 
 	SHTC3_Status_TypeDef sendCommand(SHTC3_Commands_TypeDef cmd);
-	SHTC3_Status_TypeDef sendCommand(SHTC3_MeasurementModes_TypeDef cmd);					  // Overloaded version of send command to support the "measurement type" commands
-	SHTC3_Status_TypeDef abortUpdate(SHTC3_Status_TypeDef status, char *file, uint16_t line); // Used to bail from an update. Sets reading values to known fail state
-	SHTC3_Status_TypeDef exitOp(SHTC3_Status_TypeDef status, char *file, uint16_t line);	  // Used to bail from any other operation - puts the sensor back to sleep
+	SHTC3_Status_TypeDef sendCommand(SHTC3_MeasurementModes_TypeDef cmd);							// Overloaded version of send command to support the "measurement type" commands
+	SHTC3_Status_TypeDef abortUpdate(SHTC3_Status_TypeDef status, const char *file, uint16_t line); // Used to bail from an update. Sets reading values to known fail state
+	SHTC3_Status_TypeDef exitOp(SHTC3_Status_TypeDef status, const char *file, uint16_t line);		// Used to bail from any other operation - puts the sensor back to sleep
 
 	SHTC3_Status_TypeDef startProcess(void); // Used to wake up the sensor and set the _inProcess variable to true
 	SHTC3_Status_TypeDef endProcess(void);	 // Used to end processes as the user desires
@@ -101,6 +101,6 @@ float SHTC3_raw2DegC(uint16_t T);	  // Converts SHTC3 T data to deg C
 float SHTC3_raw2DegF(uint16_t T);	  // Converts SHTC3 T data to deg F
 float SHTC3_raw2Percent(uint16_t RH); // Converts SHTC3 RH data to % RH
 
-void SHTC3_exitOp_Callback(SHTC3_Status_TypeDef status, bool inProcess, char *file, uint16_t line) __attribute__((weak)); // Called whenever exitOp is called, which is on most return statements
+void SHTC3_exitOp_Callback(SHTC3_Status_TypeDef status, bool inProcess, const char *file, uint16_t line) __attribute__((weak)); // Called whenever exitOp is called, which is on most return statements
 
 #endif /* SF_SHTC3 */
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