diff --git a/slave/slave/config.h b/slave/slave/config.h
--- a/slave/slave/config.h
+++ b/slave/slave/config.h
@@ -23,7 +23,7 @@
 
 // Number of datatypes to transmit per module type
 #define DATATYPES_GENERIC 1
-#define DATATYPES_SENSOR 6
+#define DATATYPES_SENSOR 3 //Should be set to more
 #define DATATYPES_GEIGER 2
 #define DATATYPES_CAMERA 1
 
diff --git a/slave/slave/lib/masterComm.c b/slave/slave/lib/masterComm.c
--- a/slave/slave/lib/masterComm.c
+++ b/slave/slave/lib/masterComm.c
@@ -67,11 +67,11 @@ void masterComm_types()
 void masterComm_modules()
 {
 	// Send BoardTemperature (Common for all modules)
-	serial0_sendString("[");
-	snprintf(buff2,64,"1%u",sensors_getBoardTemp());
+	serial0_sendChar('[');
+	snprintf(buff2,64,"0%u",sensors_getBoardTemp());
 	serial0_sendString(buff2);
-	serial0_sendString("]");	
-	serial0_sendString(masterComm_checksum(buff2));	
+	serial0_sendChar(']');	
+	serial0_sendChar(masterComm_checksum(buff2));	
 	
 	// Send module specific sensor readings
 	switch(io_getModuleId())
@@ -85,40 +85,40 @@ void masterComm_modules()
 			// Sensors
 			
 			// Send SPI Temperature (Air)
-			serial0_sendString("[");
+			serial0_sendChar('[');
 			snprintf(buff2,64,"2%u",sensors_getSpiTemp());
 			serial0_sendString(buff2);
-			serial0_sendString("]");
-			serial0_sendString(masterComm_checksum(buff2));
+			serial0_sendChar(']');
+			serial0_sendChar(masterComm_checksum(buff2));
 			
 			// Send Ambient Light (Needs to be formatted)
-			serial0_sendString("[");
+			serial0_sendChar('[');
 			snprintf(buff2,64,"3%u",geiger_getCpm());		//FIX
 			serial0_sendString(buff2);
-			serial0_sendString("]");
-			serial0_sendString(masterComm_checksum(buff2));
+			serial0_sendChar(']');
+			serial0_sendChar(masterComm_checksum(buff2));
 			
 /*			
 			// Send CPM (radiation)
-			serial0_sendString("[");
+			serial0_sendChar('[');
 			snprintf(buff2,64,"7%u",geiger_getCpm());
 			serial0_sendString(buff2);
-			serial0_sendString("]");
-			serial0_sendString(masterComm_checksum(buff2));
+			serial0_sendChar(']');
+			serial0_sendChar(masterComm_checksum(buff2));
 		
 			// Send CPM (radiation)
-			serial0_sendString("[");
+			serial0_sendChar('[');
 			snprintf(buff2,64,"7%u",geiger_getCpm());
 			serial0_sendString(buff2);
-			serial0_sendString("]");
-			serial0_sendString(masterComm_checksum(buff2));
+			serial0_sendChar(']');
+			serial0_sendChar(masterComm_checksum(buff2));
 		
 			// Send CPM (radiation)
-			serial0_sendString("[");
+			serial0_sendChar('[');
 			snprintf(buff2,64,"7%u",geiger_getCpm());
 			serial0_sendString(buff2);
-			serial0_sendString("]");
-			serial0_sendString(masterComm_checksum(buff2));
+			serial0_sendChar(']');
+			serial0_sendChar(masterComm_checksum(buff2));
 */
 			
 			break;
@@ -127,11 +127,11 @@ void masterComm_modules()
 			// Geiger
 			
 			// Send CPM (radiation)
-			serial0_sendString("[");
+			serial0_sendChar('[');
 			snprintf(buff2,64,"7%u",geiger_getCpm());
 			serial0_sendString(buff2);
-			serial0_sendString("]");
-			serial0_sendString(masterComm_checksum(buff2));
+			serial0_sendChar(']');
+			serial0_sendChar(masterComm_checksum(buff2));
 			
 			break;
 		
@@ -151,12 +151,12 @@ void masterComm_send()
 {
 	masterComm_types();		// Calculates how many data types to send
 	
-	// Return resquest with number of data types to be sent
-	serial0_sendString("[");						// Send opening bracket
+	// Return request with number of data types to be sent
+	serial0_sendChar('[');						// Send opening bracket
 	snprintf(buff2,64,"@%u",dataTypes);				// Send package (@ reply and number of data types)
 	serial0_sendString(buff2);
-	serial0_sendString("]");						// Send closing bracket
-	serial0_sendString(masterComm_checksum(buff2));	// Calculate and send checksum
+	serial0_sendChar(']');						// Send closing bracket
+	serial0_sendChar(masterComm_checksum(buff2));	// Calculate and send checksum
 	
 	masterComm_modules();	// Send sensor data
 }
@@ -171,7 +171,7 @@ void masterComm_checkParser()
 			led_on(2);
 			// Send all data
 			masterComm_send();
-			led_off(2);
+			//led_off(2);
 		}	
 	}
 }
diff --git a/slave/slave/modules.c b/slave/slave/modules.c
--- a/slave/slave/modules.c
+++ b/slave/slave/modules.c
@@ -12,7 +12,8 @@
  #include <util/delay.h>
  #include "modules.h"
  #include "lib/spi.h"
- 
+ #include "lib/i2c.h"
+ #include "lib/sensors.h"
  
  void modules_setup(uint8_t id)
  {
@@ -122,9 +123,9 @@
 	// Gathers data and performs functions for sensor daughter board
 	sensors_readBoardTemp();		//Data Read
 	sensors_readSpiTemp();			//Data Read
-	sensors_readPressure();			//Data Read
-	sensors_readHumid();			//Data Read
-	sensors_readLight();			//Data Read
+	//sensors_readPressure();			//Data Read
+	//sensors_readHumid();			//Data Read
+	//sensors_readLight();			//Data Read
 	 
  }
   
diff --git a/slave/slave/slave.c b/slave/slave/slave.c
--- a/slave/slave/slave.c
+++ b/slave/slave/slave.c
@@ -89,6 +89,7 @@ int main(void)
 			//led_toggle(0);		// Toggle LED0(Blue) to show loop running
 			_delay_ms(2);		// Delay to prevent the sensor loop from running again before time_millis changes
 			led_off(0);
+			led_off(2);
 		}
 
     }