diff --git a/fw/lib_i2c.h b/fw/lib_i2c.h
index c3bf8fd..e6780f4 100644
--- a/fw/lib_i2c.h
+++ b/fw/lib_i2c.h
@@ -10,6 +10,16 @@
 
 #define I2C_DEFAULT_TIMEOUT 50000
 
+
+#if defined(FUNCONF_USE_DEBUGPRINTF) || defined(FUNCONF_USE_USBPRINTF) || defined(FUNCONF_USE_UARTPRINTF)
+#include <stdio.h>
+static inline void print_i2c_device(uint8_t addr)
+{
+	printf("Device found at 0x%02X\n", addr);
+}
+#endif
+
+
 //! ####################################
 //! I2C INIT FUNCTIONS
 //! ####################################
diff --git a/fw/main.c b/fw/main.c
index e46f25f..63053e4 100644
--- a/fw/main.c
+++ b/fw/main.c
@@ -9,42 +9,18 @@
 #include "filter.h"
 #include "sc7a20.h"
 #include "pd.h"
+#include "ntc.h"
 #include "fpmath.h"
 #include "coroutine.h"
 
 
 // constants
-// LUT for converting NTC readings to degrees celsius
-// Nominal: 10kOhm, Beta: 3380, Step: 64
-// TODO: Add a fixed offset to account for toollerances
-const uint8_t ntc_step_size = 64;
-const int16_t ntc_lut[] = {
-	1316, 197, 155, 133, 119, 108, 100, 93, 87, 82, 77, 73, 69, 66, 63, 60,
-	57, 54, 52, 50, 47, 45, 43, 41, 39, 37, 35, 34, 32, 30, 28, 27,
-	25, 23, 22, 20, 19, 17, 15, 14, 12, 11, 9, 7, 6, 4, 2, 0,
-	-1, -3, -5, -7, -9, -11, -14, -16, -19, -22, -25, -28, -32, -38, -44, -55,
-	-55 // extra value to not have an extra if statement
-};
-
-
 u8g2_t *u8g2;
 int16_t encoder = 0; // rotary encoder counter
 uint32_t last_interrupt = 0; // last time the encoder interrupt was triggered
 struct pd_profile_t pd_profile;
 uint16_t vcc_mv = 3300;
 
-// Convert the raw adc reading to a temperature in celsius with the ntc lut,
-// linearly interpolating between positions
-static inline int16_t get_temp_c(uint16_t adc_reading)
-{
-	if (adc_reading > 4095) return 0;
-	uint8_t index = adc_reading / ntc_step_size;
-	uint8_t remainder = adc_reading % ntc_step_size;
-	int16_t temp_base = index < 64 ? ntc_lut[index] : 0;
-	int16_t temp_next = ntc_lut[index + 1];
-	return temp_base + ((temp_next - temp_base) * remainder)/ntc_step_size;
-}
-
 
 // convert the raw TPA191 adc reading to a current in milliamps
 static inline int16_t get_current_ma(uint16_t adc_reading)
@@ -56,12 +32,6 @@ static inline int16_t get_current_ma(uint16_t adc_reading)
 }
 
 
-void print_i2c_device(uint8_t addr)
-{
-	printf("Device found at 0x%02X\n", addr);
-}
-
-
 // this callback is mandatory when FUNCONF_USE_USBPRINTF is defined,
 // can be empty though
 void handle_usbfs_input(int numbytes, uint8_t *data)
diff --git a/fw/ntc.h b/fw/ntc.h
new file mode 100644
index 0000000..8b18acd
--- /dev/null
+++ b/fw/ntc.h
@@ -0,0 +1,31 @@
+#ifndef _NTC_H
+#define _NTC_H
+
+#include <stdint.h>
+
+// LUT for converting NTC readings to degrees celsius
+// Nominal: 10kOhm, Beta: 3380, Step: 64
+// TODO: Add a fixed offset to account for toollerances
+const uint8_t ntc_step_size = 64;
+const int16_t ntc_lut[] = {
+	1316, 197, 155, 133, 119, 108, 100, 93, 87, 82, 77, 73, 69, 66, 63, 60,
+	57, 54, 52, 50, 47, 45, 43, 41, 39, 37, 35, 34, 32, 30, 28, 27,
+	25, 23, 22, 20, 19, 17, 15, 14, 12, 11, 9, 7, 6, 4, 2, 0,
+	-1, -3, -5, -7, -9, -11, -14, -16, -19, -22, -25, -28, -32, -38, -44, -55,
+	-55 // extra value to not have an extra if statement
+};
+
+// Convert the raw adc reading to a temperature in celsius with the ntc lut,
+// linearly interpolating between positions
+static inline int16_t get_temp_c(uint16_t adc_reading)
+{
+	if (adc_reading > 4095) return 0;
+	uint8_t index = adc_reading / ntc_step_size;
+	uint8_t remainder = adc_reading % ntc_step_size;
+	int16_t temp_base = index < ntc_step_size ? ntc_lut[index] : 0;
+	int16_t temp_next = ntc_lut[index + 1];
+	return temp_base + ((temp_next - temp_base) * remainder)/ntc_step_size;
+}
+
+
+#endif