diff --git a/master/master/config.h b/master/master/config.h
--- a/master/master/config.h
+++ b/master/master/config.h
@@ -15,6 +15,8 @@
 
 #include <avr/pgmspace.h>
 
+// NOTE: Some settings may be overridden by SD card config.ini parameters
+
 // --------------------------------------------------------------------------
 // Hardware settings
 // --------------------------------------------------------------------------
@@ -38,7 +40,7 @@
 #define HEATER_THRESHOLD 5 // Regulate to 5 degrees Celsius
 
 // Touchdown buzzer
-#define BUZZER_RATE 5000
+#define BUZZER_RATE 7000
 #define BUZZER_DURATION 1000
 #define BUZZER_FAILSAFE_DURATION  9600000 // 160min
 #define BUZZER_TRIGGER_MINDURATION 2700000 // 45min
@@ -53,12 +55,13 @@
 #define ERROR_SD_INIT 1
 #define ERROR_SD_PARTITION 2
 #define ERROR_SD_FILE 3
-#define ERROR_XBEETIMEOUT 4
-#define ERROR_FATAL 5
-#define ERROR_ATFAIL 6
-#define ERROR_EXITAT 7
-#define ERROR_INFOTEXT 8
-#define ERROR_WATCHDOG 9
+#define ERROR_CONFIGPARSE 4
+#define ERROR_XBEETIMEOUT 5
+#define ERROR_FATAL 6
+#define ERROR_ATFAIL 7
+#define ERROR_EXITAT 8
+#define ERROR_INFOTEXT 9
+#define ERROR_WATCHDOG 10
 // !!! Please specify/update detailed messages for these error codes in logger.c
 
 // --------------------------------------------------------------------------
@@ -164,7 +167,7 @@
 #define WATCHDOG_PROGTIMER_EEPROM_ADDR 0x20
 
 // Written to the beginning of every log file
-#define LOGGER_HEADERTEXT "HAB Control Master - 1.1\n"
+#define LOGGER_HEADERTEXT "HAB Master v1.2\n"
 
 // Log to SD card every X milliseconds
 #define LOGGER_RATE 1000 
@@ -173,4 +176,25 @@
 #define LEDCYCLE_RATE 100 
 
 
+
+// --------------------------------------------------------------------------
+// Dynamic Configuration (iniparse.c) - You probably don't want to change this
+// --------------------------------------------------------------------------
+#include <stdbool.h>
+typedef struct
+{
+	bool blackout_enable;
+	uint32_t blackout_timeout;
+	int8_t heater_threshold;
+	uint32_t buzzer_failsafe_duration;
+	uint32_t buzzer_trigger_minduration;
+	uint32_t buzzer_trigger_maxaltitude;
+	uint32_t datarequest_rate;
+	char s_callsign[10];
+	uint8_t s_callsign_id;
+	uint32_t aprs_transmit_period;
+} configuration;
+
+configuration* sysconfig;
+
 #endif /* CONFIG_H_ */
\ No newline at end of file
diff --git a/master/master/lib/aprs.c b/master/master/lib/aprs.c
--- a/master/master/lib/aprs.c
+++ b/master/master/lib/aprs.c
@@ -27,7 +27,7 @@ void aprs_send()
 {
   const struct s_address addresses[] = { 
     {D_CALLSIGN, D_CALLSIGN_ID},  // Destination callsign
-    {S_CALLSIGN, S_CALLSIGN_ID},  // Source callsign (-11 = balloon, -9 = car)
+    {sysconfig->s_callsign, sysconfig->s_callsign_id},  // Source callsign (-11 = balloon, -9 = car)
 #ifdef DIGI_PATH1
     {DIGI_PATH1, DIGI_PATH1_TTL}, // Digi1 (first digi in the chain)
 #endif
diff --git a/master/master/lib/gps.c b/master/master/lib/gps.c
--- a/master/master/lib/gps.c
+++ b/master/master/lib/gps.c
@@ -97,6 +97,11 @@ char* get_hdop()
 }
 
 char altitude[10];	//xxxxxx.x
+char* get_gpsaltitude()
+{
+	return altitude;
+}
+
 char wgs84Height[8];	//sxxx.x
 char lastUpdated[8];	//blank - included for testing
 char stationID[8];	//blank - included for testing
diff --git a/master/master/lib/gps.h b/master/master/lib/gps.h
--- a/master/master/lib/gps.h
+++ b/master/master/lib/gps.h
@@ -26,6 +26,7 @@ char* get_longitudeLSBs();
 char* get_latitudeTrimmed();
 char* get_latitudeLSBs();
 char* get_timestamp();
+char* get_gpsaltitude();
 char* get_speedKnots();
 char* get_course();
 char* get_hdop();
diff --git a/master/master/lib/heater.c b/master/master/lib/heater.c
--- a/master/master/lib/heater.c
+++ b/master/master/lib/heater.c
@@ -17,12 +17,12 @@
  void heater_regulateTemp()
  {
 	 // Gets board temperature and enables heater if below threshold
-	 if (sensors_getBoardTemp() <= HEATER_THRESHOLD)
+	 if (sensors_getBoardTemp() <= sysconfig->heater_threshold)
 	 {
 		 led_on(LED_HEAT);
 		 led_on(LED_STATUS);
 	 }
-	 else if (sensors_getBoardTemp() > (HEATER_THRESHOLD + 5))
+	 else if (sensors_getBoardTemp() > (sysconfig->heater_threshold + 5))
 	 {
 		 led_off(LED_HEAT);
 		 led_off(LED_STATUS);
diff --git a/master/master/lib/logger.c b/master/master/lib/logger.c
--- a/master/master/lib/logger.c
+++ b/master/master/lib/logger.c
@@ -36,12 +36,13 @@ const char err_0[] PROGMEM = "slave time
 const char err_1[] PROGMEM = "initializing SD card failed";
 const char err_2[] PROGMEM = "opening SD partition failed";
 const char err_3[] PROGMEM = "opening SD file failed";
-const char err_4[] PROGMEM = "XBee timeout";
-const char err_5[] PROGMEM = "FATAL UNHANDLED ERROR";
-const char err_6[] PROGMEM = "enter AT mode failed";
-const char err_7[] PROGMEM = "exit AT mode failed";
-const char err_8[] PROGMEM = "infotext";
-const char err_9[] PROGMEM = "watchdog";
+const char err_4[] PROGMEM = "error parsing config file";
+const char err_5[] PROGMEM = "XBee timeout";
+const char err_6[] PROGMEM = "FATAL UNHANDLED ERROR";
+const char err_7[] PROGMEM = "enter AT mode failed";
+const char err_8[] PROGMEM = "exit AT mode failed";
+const char err_9[] PROGMEM = "infotext";
+const char err_10[] PROGMEM = "watchdog";
 
 const char *const errorMessageLookup[] PROGMEM =
 {
@@ -54,7 +55,8 @@ const char *const errorMessageLookup[] P
 	err_6,
 	err_7,
 	err_8,
-	err_9
+	err_9,
+	err_10
 };
 
 
@@ -62,8 +64,10 @@ const char *const errorMessageLookup[] P
 struct partition_struct* partition;
 struct fat_fs_struct* fs;
 struct fat_dir_struct* dd;
+
 struct fat_file_struct* fd_datalog;
 struct fat_file_struct* fd_errorlog;
+struct fat_file_struct* fd_config;
 
 void logger_setup()
 {
@@ -122,14 +126,12 @@ void logger_setup()
 	struct fat_dir_entry_struct errorDirEntry;
 	if(fat_create_file(dd, errorFilename, &errorDirEntry) == 0)
 	{
-		serial0_sendString("Error create errorlog\r\n");
 		error_log(ERROR_SD_FILE, true);
 	}
 	// Search for file in current directory and open it
 	fd_errorlog = open_file_in_dir(fs, dd, errorFilename);
 	if(!fd_errorlog)
 	{
-		serial0_sendString("Error open errorlog!\r\n");
 		error_log(ERROR_SD_FILE, true);
 		return;
 	}
@@ -137,7 +139,6 @@ void logger_setup()
 	if(!fat_seek_file(fd_errorlog, &errorOffset, FAT_SEEK_SET))
 	{
 		// Error seeking to file
-		serial0_sendString("Error seek errorlog!\r\n");
 		error_log(ERROR_SD_FILE, true);
 		fat_close_file(fd_errorlog);
 		return;
@@ -153,14 +154,12 @@ void logger_setup()
 	// Create new data log file
 	if(fat_create_file(dd, dataFilename, &dataDirEntry) == 0) 
 	{
-		serial0_sendString("Error create datalog\r\n");
 		error_log(ERROR_SD_FILE, true);
 	}
 	// Search for file in current directory and open it
 	fd_datalog = open_file_in_dir(fs, dd, dataFilename);
 	if(!fd_datalog)
 	{
-		serial0_sendString("Error open datalog!\r\n");
 		error_log(ERROR_SD_FILE, true);
 		return;
 	}
@@ -168,22 +167,50 @@ void logger_setup()
 	if(!fat_seek_file(fd_datalog, &dataOffset, FAT_SEEK_SET))
 	{
 		// Error seeking to file
-		serial0_sendString("Error seek datalog!\r\n");
 		error_log(ERROR_SD_FILE, true);
 		fat_close_file(fd_datalog);
 		return;
 	}
 	
+	
+	
+	int32_t configOffset = 0;
+	
+	// Search for file in current directory and open it
+	fd_config = open_file_in_dir(fs, dd, "config.ini");
+	if(!fd_config)
+	{
+		error_log_msg(ERROR_CONFIGPARSE, true, "opening");
+		return;
+	}
+	configOffset=0;
+	if(!fat_seek_file(fd_config, &configOffset, FAT_SEEK_SET))
+	{
+		// Error seeking to file
+		error_log_msg(ERROR_CONFIGPARSE, true, "seeking");
+		fat_close_file(fd_config);
+		//Don't return, just continue
+	}
+	
+	
 	
 	// Write header information
 	logger_log(LOGGER_HEADERTEXT);
-	logger_log("\n-- BEGIN DATA --\n");
 	
 	error_log_rawwrite(LOGGER_HEADERTEXT);
-	error_log_rawwrite("\n-- BEGIN ERROR --\n");
-	error_log_rawwrite("\nErrorNo,ErrorMsg,ErrorInfo,\r\n");
+	error_log_rawwrite("\nErrNo,ErrMsg,ErrInfo,\r\n");
 }	
 
+struct fat_file_struct* logger_getconfigfd() 
+{
+	return fd_config;	
+}
+
+void logger_closeconffd()
+{
+	fat_close_file(fd_config);
+}
+
 void logger_log(char *buffer) 
 {
 	uint8_t len = strlen(buffer);
@@ -285,6 +312,45 @@ void logger_closeLog()
 	partition_close(partition);
 }
 
+char* logger_config_fgets(char* line, uint8_t max) {
+	int len = 0;
+    //char line[50];
+	while(len<max) {
+		if(fat_read_file(fd_config, (uint8_t*)line+len, 1)) {
+			// lf
+			if(len == 0 && line[len] == 0x0a)
+			{
+				// skip lf, keep going
+				len = 0;
+			}
+			// cr
+			else if(line[len] == 0x0d)
+			{
+				break;
+			}
+			else {
+				len++;
+			}			
+		}
+		else 
+		{
+			return NULL; // End of file
+		}			
+	}
+
+	if(len >= max) // too long line
+	{
+		// Null-terminate and hope that the comment was the long part
+		line[len] = 0x00;
+	}	
+	else
+	{
+		line[len] = 0x00; // terminate string
+	}	
+	
+	return line;
+}
+
 
 // INTERNAL FUNCTIONS
 
diff --git a/master/master/lib/logger.h b/master/master/lib/logger.h
--- a/master/master/lib/logger.h
+++ b/master/master/lib/logger.h
@@ -17,6 +17,9 @@
 #include <stdbool.h>
 
 void logger_setup();
+struct fat_file_struct* logger_getconfigfd();
+char* logger_config_fgets(char* line, uint8_t max);
+void logger_closeconffd();
 uint8_t logger_writeLine(char* dateLine, uint8_t length);
 struct fat_file_struct* open_file_in_dir(struct fat_fs_struct* fs, struct fat_dir_struct* dd, const char* name);
 uint8_t find_file_in_dir(struct fat_fs_struct* fs, struct fat_dir_struct* dd, const char* name, struct fat_dir_entry_struct* dir_entry);
diff --git a/master/master/lib/sdcard/fat_config.h b/master/master/lib/sdcard/fat_config.h
--- a/master/master/lib/sdcard/fat_config.h
+++ b/master/master/lib/sdcard/fat_config.h
@@ -102,7 +102,7 @@ void get_datetime(uint16_t* year, uint8_
  * \ingroup fat_config
  * Maximum number of file handles.
  */
-#define FAT_FILE_COUNT 2
+#define FAT_FILE_COUNT 3
 
 /**
  * \ingroup fat_config
diff --git a/master/master/lib/sensordata.c b/master/master/lib/sensordata.c
--- a/master/master/lib/sensordata.c
+++ b/master/master/lib/sensordata.c
@@ -164,7 +164,7 @@ void sensordata_logvalues()
 			csvHeader[0] = 0x00;
 			
 			// Add master data headers
-			logger_log("Time,BoardTemp,VBatt,GPSTime,GPSLat,GPSLon,GPSSpeed,GPSHDOP,GPSCourse,GPSSV,");
+			logger_log("Time,BoardTemp,VBatt,GPSTime,GPSLat,GPSLon,GPSAlt,GPSSpeed,GPSHDOP,GPSCourse,GPSSV,");
 			
 			// Add slave data headers
 			for(uint8_t i=0; i<MAX_NUM_SLAVES; i++) 
@@ -195,7 +195,7 @@ void sensordata_logvalues()
 		logbuf[0] = 0x00;
 		
 		// Write master sensor values
-		snprintf(logbuf, CSV_LOGLINE_SIZE, "%lu,%d,%u,%s,%s,%s,%s,%s,%s,%s,", time_millis(), sensors_getBoardTemp(), sensors_getBatt(), get_timestamp(),get_latitudeTrimmed(),get_longitudeTrimmed(),get_speedKnots(),get_hdop(), get_course(), get_sv());
+		snprintf(logbuf, CSV_LOGLINE_SIZE, "%lu,%d,%u,%s,%s%s,%s%s,%s,%s,%s,%s,%s,", time_millis(), sensors_getBoardTemp(), sensors_getBatt(), get_timestamp(), get_latitudeTrimmed(), get_latitudeLSBs(), get_longitudeTrimmed(), get_longitudeLSBs(),get_gpsaltitude(), get_speedKnots(), get_hdop(), get_course(), get_sv());
 		
 		// Write slave sensor values
 		for(int i=0; i<MAX_NUM_SLAVES; i++) 
@@ -246,14 +246,14 @@ void sensordata_checkTouchdown()
 		return;
 	}
 	
-	if(time_millis() > BUZZER_FAILSAFE_DURATION)
+	if(time_millis() > sysconfig->buzzer_failsafe_duration)
 	{
 		isTouchdown = true;
 	}
 	else
 	{
 		int32_t altitude = sensordata_getSensorValue(SENSOR_ALTITUDE);
-		if(altitude != -2111111111 && altitude < BUZZER_TRIGGER_MAXALTITUDE && time_millis() > BUZZER_TRIGGER_MINDURATION)
+		if(altitude != -2111111111 && altitude < sysconfig->buzzer_trigger_maxaltitude && time_millis() > sysconfig->buzzer_trigger_minduration)
 		{
 			isTouchdown = true;
 		}			
diff --git a/master/master/master.c b/master/master/master.c
--- a/master/master/master.c
+++ b/master/master/master.c
@@ -35,6 +35,7 @@
 #include "lib/slavesensors.h"
 #include "lib/serparser.h"
 #include "lib/sensordata.h"
+#include "lib/iniparse.h"
 
 int main(void)
 {
@@ -55,8 +56,9 @@ int main(void)
 	sensors_setup();
 	logger_setup();
 	watchdog_checkreset();
+	iniparse_getconfig();
 	afsk_setup();
-	serial0_sendString("\r\nHello.\r\n\r\n");
+	serial0_sendString("Hello.\n\n");
 	
 	// Blocking ZigBee node discovery
 	slavesensors_network_scan();
@@ -108,10 +110,6 @@ int main(void)
 			
 			sensors_readBoardTemp();
 			sensors_readBatt();
-			
-			//char buftmp[15];
-			//snprintf(buftmp, 15, "vbatt: %u\r\n", sensors_getBatt());
-			//serial0_sendString(buftmp);
 		
 			// Write CSV header and log data values
 			sensordata_logvalues();			
@@ -137,7 +135,7 @@ int main(void)
 		}
 		
 		// Periodic: Data Request
-		if(time_millis() - lastDataReq > DATAREQUEST_RATE)  
+		if(time_millis() - lastDataReq > sysconfig->datarequest_rate)  
 		{
 			// Start getting values for next transmission
 			if(slavesensors_isrequesting())
@@ -155,7 +153,7 @@ int main(void)
 		
 		
 		// Periodic: APRS transmission
-		if(time_millis() - lastAprsBroadcast > APRS_TRANSMIT_PERIOD) 
+		if(time_millis() - lastAprsBroadcast > sysconfig->aprs_transmit_period) 
 		{
 			// Check for touchdown
 			sensordata_checkTouchdown();
@@ -170,15 +168,14 @@ int main(void)
 			lastAprsBroadcast = time_millis();
 		}			
 		
-		#ifdef BLACKOUT_ENABLE
+		// Periodic: Blackout timer check
 		bool black = false;
-		if(!black && time_millis() > BLACKOUT_TIMEOUT) 
+		if(sysconfig->blackout_enable && !black && time_millis() > sysconfig->blackout_timeout) 
 		{
 			// LED blackout
 			led_blackout();
 			black = true;
 		}
-		#endif
 		
 		// Parse any serial data in the XBee software buffer
 		parseResult = serparser_parse();
diff --git a/master/master/master.cproj b/master/master/master.cproj
--- a/master/master/master.cproj
+++ b/master/master/master.cproj
@@ -132,6 +132,18 @@
     <Compile Include="lib\ax25.h">
       <SubType>compile</SubType>
     </Compile>
+    <Compile Include="lib\iniparse.c">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="lib\iniparse.h">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="lib\ini\ini.c">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="lib\ini\ini.h">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="lib\sensors.c">
       <SubType>compile</SubType>
     </Compile>
@@ -246,6 +258,7 @@
   </ItemGroup>
   <ItemGroup>
     <Folder Include="lib" />
+    <Folder Include="lib\ini" />
     <Folder Include="lib\sdcard" />
   </ItemGroup>
   <Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />