diff --git a/Source/main.c b/Source/main.c
--- a/Source/main.c
+++ b/Source/main.c
@@ -28,17 +28,24 @@ int main(void)
   gps_poweron();
 
   // Software timers
+  uint32_t last_transmission = HAL_GetTick();
   uint32_t last_led = HAL_GetTick();
 
   while (1)
   {
 	  // Blink LEDs
-	  if(HAL_GetTick() - last_led > 50)
+	  if(HAL_GetTick() - last_transmission > 700)
 	  {
-		  gps_update_data();
+		  gps_update_data(); // Will always return at 1hz rate (default measurement rate)
 		  aprs_send();
-		  while(afsk_busy());
+		  //while(afsk_busy());
 
+		  last_transmission = HAL_GetTick();
+	  }
+
+	  if(HAL_GetTick() - last_led > 100)
+	  {
+		  HAL_GPIO_TogglePin(LED_POWER);
 		  last_led = HAL_GetTick();
 	  }
 
@@ -46,7 +53,6 @@ int main(void)
 		  si446x_cw_off();
 
 	  // High-frequency function calls
-//	  gpio_process_shutdown();
 //	  watchdog_feed();
   }
 }