Fixed compilation warnings

fw/Core/Inc/main.h

@@ -50,6 +50,7 @@ extern "C" {
 /* USER CODE BEGIN Includes */
 #include "i2c.h"
 #include "scd4x.h"
+#include "sht4x.h"
 /* USER CODE END Includes */
 
 /* Exported types ------------------------------------------------------------*/

fw/Core/Inc/scd4x.h

@@ -5,8 +5,8 @@
  *      Author: user
  */
 
-#ifndef INC_SHT4X_H_
-#define INC_SHT4X_H_
+#ifndef INC_SCD4X_H_
+#define INC_SCD4X_H_
 
 #include "stdint.h"
 #include "stm32l0xx_ll_i2c.h"
@@ -54,4 +54,4 @@ int8_t scd4x_perform_factory_reset( void );
 
 int8_t scd4x_read_measurement(int * co2, int *temperature, int *relative_humidity);
 
-#endif /* INC_SHT4X_H_ */
+#endif /* INC_SCD4X_H_ */

fw/Core/Src/scd4x.c

@@ -25,7 +25,7 @@ int8_t scd4x_send_cmd(scd4x_cmd_t cmd)
 
 int8_t scd4x_read_data(uint8_t *buffer, int len)
 {
-
+	return SCD4X_OK;
 }
 
 int8_t scd4x_start_periodic_measurement( void )

fw/Core/Src/sht4x.c

@@ -9,12 +9,12 @@
 
 int8_t sht4x_send_cmd(sht4x_cmd_t cmd)
 {
-
+	return SHT4X_OK;
 }
 
 int8_t sht4x_read_data(uint8_t *buffer, int len)
 {
-
+	return SHT4X_OK;
 }
 
 int8_t sht4x_measure(int *temperature, int *relative_humidity)