diff --git a/fw/Core/Inc/config.h b/fw/Core/Inc/config.h
new file mode 100644
index 0000000..e77cd41
--- /dev/null
+++ b/fw/Core/Inc/config.h
@@ -0,0 +1,43 @@
+/*
+ * config.h
+ *
+ *  Created on: Sep 5, 2021
+ *      Author: dukenuc
+ */
+
+#ifndef INC_CONFIG_H_
+#define INC_CONFIG_H_
+
+/* TODO: add comments to everything */
+
+#define VENDOR_NAME_LENGTH			64
+#define	PRODUCT_CODE_LENGTH			64
+#define	PRODUCT_NAME_LENGTH			64
+#define REVISION_LENGTH				16
+#define SERIAL_NUMBER_LENGTH		64
+
+#define CONFIG_OK					0
+#define CONFIG_ERROR				-1
+
+
+typedef struct
+{
+	/* DEVICE ID */
+	uint8_t vendor_name[VENDOR_NAME_LENGTH];
+	uint8_t product_code[PRODUCT_CODE_LENGTH];
+	uint8_t product_name[PRODUCT_NAME_LENGTH];
+	uint8_t revision[REVISION_LENGTH];
+	uint8_t serial_number[SERIAL_NUMBER_LENGTH];
+
+	/* DEVICE SPECIFIC CONFIG */
+	uint8_t led_on;
+	uint16_t led_co2_alert_limit1;
+	uint16_t led_co2_alert_limit2;
+} config_t;
+
+int8_t read_config(config_t *config);
+
+int8_t write_config(config_t *config);
+
+#endif /* INC_CONFIG_H_ */
+
diff --git a/fw/Core/Inc/scd4x.h b/fw/Core/Inc/scd4x.h
index e76a6ca..921f9ee 100644
--- a/fw/Core/Inc/scd4x.h
+++ b/fw/Core/Inc/scd4x.h
@@ -52,6 +52,6 @@ int8_t scd4x_stop_periodic_measurement( void );
 
 int8_t scd4x_perform_factory_reset( void );
 
-int8_t scd4x_read_measurement(int * co2, int *temperature, int *relative_humidity);
+int8_t scd4x_read_measurement(uint16_t * co2, int16_t *temperature, uint16_t *relative_humidity);
 
 #endif /* INC_SCD4X_H_ */
diff --git a/fw/Core/Inc/sht4x.h b/fw/Core/Inc/sht4x.h
index 8389107..36c4351 100644
--- a/fw/Core/Inc/sht4x.h
+++ b/fw/Core/Inc/sht4x.h
@@ -52,6 +52,6 @@ typedef enum {
 
 int8_t sht4x_send_cmd(sht4x_cmd_t cmd);
 int8_t sht4x_read_data(uint8_t *buffer, int len);
-int8_t sht4x_measure(int *temperature, int *relative_humidity);
+int8_t sht4x_measure(int16_t *temperature, uint16_t *relative_humidity);
 
 #endif /* INC_SHT4X_H_ */
diff --git a/fw/Core/Src/config.c b/fw/Core/Src/config.c
new file mode 100644
index 0000000..f049680
--- /dev/null
+++ b/fw/Core/Src/config.c
@@ -0,0 +1,18 @@
+/*
+ * config.c
+ *
+ *  Created on: Sep 5, 2021
+ *      Author: dukenuc
+ */
+
+
+
+int8_t read_config(config_t *config)
+{
+	return CONFIG_OK;
+}
+
+int8_t write_config(config_t *config)
+{
+	return CONFIG_OK;
+}
diff --git a/fw/Core/Src/main.c b/fw/Core/Src/main.c
index 5cd0751..82e98f4 100644
--- a/fw/Core/Src/main.c
+++ b/fw/Core/Src/main.c
@@ -263,7 +263,9 @@ int main(void)
 		  /* Read SCD4x data (if connected) */
 		  if (scd4x_is_connected == 1)
 		  {
-			  scd4x_read_measurement(&CO2, &T_SCD4x, &RH_SCD4x);
+			  scd4x_read_measurement(&CO2,
+					  	  	  	  	 &T_SCD4x,
+									 &RH_SCD4x);
 		  }
 
 		  /* Read SPS30 data (if connected) */
diff --git a/fw/Core/Src/scd4x.c b/fw/Core/Src/scd4x.c
index 56f1d9a..450cea0 100644
--- a/fw/Core/Src/scd4x.c
+++ b/fw/Core/Src/scd4x.c
@@ -43,7 +43,7 @@ int8_t scd4x_perform_factory_reset( void )
 	return scd4x_send_cmd(SCD4X_PERFORM_FACTORY_RESET);
 }
 
-int8_t scd4x_read_measurement(int * co2, int *temperature, int *relative_humidity)
+int8_t scd4x_read_measurement(uint16_t * co2, int16_t *temperature, uint16_t *relative_humidity)
 {
 	uint8_t buffer[32];
 	int result;
diff --git a/fw/Core/Src/sht4x.c b/fw/Core/Src/sht4x.c
index 63221fa..fd5bdd5 100644
--- a/fw/Core/Src/sht4x.c
+++ b/fw/Core/Src/sht4x.c
@@ -17,7 +17,7 @@ int8_t sht4x_read_data(uint8_t *buffer, int len)
 	return SHT4X_OK;
 }
 
-int8_t sht4x_measure(int *temperature, int *relative_humidity)
+int8_t sht4x_measure(int16_t *temperature, uint16_t *relative_humidity)
 {
 	uint8_t buffer[32];
 	int result;