diff --git a/slave/slave/lib/inputOutput.c b/slave/slave/lib/inputOutput.c
--- a/slave/slave/lib/inputOutput.c
+++ b/slave/slave/lib/inputOutput.c
@@ -33,7 +33,7 @@ int8_t	moduleID;	// Slave Module ID from
 	ADCSRA |= (1 << ADATE);									// Enables auto trigger, determined in ADCSRB bits ADTS
 	//ADCSRA |= (1 << ADIF);									// 
 //ADCSRA |= (1 << ADIE);									// ADC interrupt enable set
-	ADCSRB &= ~(1 << ADTS2) | (1 << ADTS1) | (1 << ADTS0);	// Set ADC auto trigger source to free running mode
+	ADCSRB &= ~((1 << ADTS2) | (1 << ADTS1) | (1 << ADTS0));	// Set ADC auto trigger source to free running mode
 	ADCSRA |= (1 << ADEN);									// Enable ADC
 	ADCSRA |= (1 << ADSC);									// Start ADC measurements.  ADC should now continuously run conversions, which are stored in ADCH 0x79
 	
diff --git a/slave/slave/lib/sensors.c b/slave/slave/lib/sensors.c
--- a/slave/slave/lib/sensors.c
+++ b/slave/slave/lib/sensors.c
@@ -254,7 +254,7 @@ uint32_t sensors_getLux(void)		// Gets l
 }
 
 //possibly uint8_t
-int8_t sensors_getBatt(void)		// Gets battery voltage from variable
+uint8_t sensors_getBatt(void)		// Gets battery voltage from variable
 {
 	return batt;
 }
diff --git a/slave/slave/lib/sensors.h b/slave/slave/lib/sensors.h
--- a/slave/slave/lib/sensors.h
+++ b/slave/slave/lib/sensors.h
@@ -15,7 +15,7 @@ void sensors_readSpiTemp(void);		// Read
 void sensors_readBoardTemp(void);	// Reads board temperature
 void sensors_readPressure(void);	// Reads pressure
 void sensors_readHumid(void);		// Reads humidity
-void sensors_readLux(void);		// Reads lux
+void sensors_readLux(void);			// Reads lux
 void sensors_readBatt(void);
 
 int16_t sensors_getSpiTemp(void);	// Gets spi temperature from variable
@@ -24,6 +24,6 @@ int32_t sensors_getPressure(void);	// Ge
 uint16_t sensors_getHumid(void);	// Gets humidity from variable
 uint32_t sensors_getLux(void);		// Gets lux from variable
 int8_t sensors_getBatt(void);		// Gets battery voltage from variable
-uint32_t sensors_getAltitude(void);		// Gets altitude from variable
+uint32_t sensors_getAltitude(void);	// Gets altitude from variable
 
 #endif /* SENSORS_H_ */
\ No newline at end of file