diff --git a/Libraries/Si446x/si446x.c b/Libraries/Si446x/si446x.c
--- a/Libraries/Si446x/si446x.c
+++ b/Libraries/Si446x/si446x.c
@@ -1,6 +1,24 @@
-//
-// Si446x: Initializes and configures a Si446x transceiver over SPI
-//
+/*
+ * FeatherHAB
+ *
+ * This file is part of FeatherHAB.
+ *
+ * FeatherHab is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * FeatherHab is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with FeatherHAB. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Ethan Zonca
+ *
+ */
 
 #include "stm32f0xx_hal.h"
 
diff --git a/Source/main.c b/Source/main.c
--- a/Source/main.c
+++ b/Source/main.c
@@ -1,21 +1,41 @@
-//
-// mBuoy Depth Select Firmware
-// Copyright 2015 SeaLandAire Technologies
-//
+/*
+ * FeatherHAB
+ *
+ * This file is part of FeatherHAB.
+ *
+ * FeatherHab is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * FeatherHab is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with FeatherHAB. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Ethan Zonca
+ *
+ */
+
+#include "stm32f0xx_hal.h"
 
 #include "config.h"
 #include "error.h"
+#include "pressure.h"
+#include "gps.h"
+
 #include "system/gpio.h"
 #include "system/sysclk.h"
 #include "system/watchdog.h"
 #include "system/uart.h"
 #include "system/adc.h"
-#include "stm32f0xx_hal.h"
+
 #include "si446x/si446x.h"
 #include "aprs/aprs.h"
 #include "aprs/afsk.h"
-#include "pressure.h"
-#include "gps.h"
 
 
 int main(void)
@@ -24,18 +44,13 @@ int main(void)
   sysclock_init();
   gpio_init();
 
-  HAL_Delay(100);
-
   adc_init();
 
   afsk_init();
   si446x_init();
   si446x_init();
 
-  HAL_Delay(100);
-
   gps_poweron();
-  HAL_Delay(100);
 
   pressure_init();
 
diff --git a/Source/system/gpio.c b/Source/system/gpio.c
--- a/Source/system/gpio.c
+++ b/Source/system/gpio.c
@@ -1,6 +1,24 @@
-//
-// GPIO: Configure and initialize GPIOs
-//
+/*
+ * FeatherHAB
+ *
+ * This file is part of FeatherHAB.
+ *
+ * FeatherHab is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * FeatherHab is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with FeatherHAB. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Ethan Zonca
+ *
+ */
 
 #include "config.h"
 #include "system/gpio.h"
diff --git a/Source/system/uart.c b/Source/system/uart.c
--- a/Source/system/uart.c
+++ b/Source/system/uart.c
@@ -1,3 +1,7 @@
+//
+// uart: configure and initialize GPS uart
+//
+
 #include "stm32f0xx_hal.h"
 
 #include "system/uart.h"