diff -r b74b0e4902c3 -r ad2c8b13eb88 main/automation.c
--- a/main/automation.c	Sat Oct 20 13:23:15 2018 +0200
+++ b/main/automation.c	Sat Oct 20 17:09:48 2018 +0200
@@ -5,48 +5,48 @@
 
 #include "config.h"
 
-int	    			BoilPower = 100;
-int				LastMashStep = 0;
-char        			temp_buf[64];
-char				logline[128];
-char				strftime_buf[64];
-bool        			loop;
-bool				CoolBeep = false;
-bool				Resume = false;
-bool				pumpRest = false;
-bool				updateRuntime = false;
-bool        			NewMinute = false;
-bool				TempReached = false;
-uint8_t     			MashState = MASH_NONE;
-float       			temp_MLT;
-float				MinMash = 38.0;
-float				MaxMash = 80.0;
-uint32_t    			power_MLT = 0;
-uint32_t			power_HLT = 0;
-uint32_t			counts = 0;
-float                           stageTemp = 0.0;
-uint16_t                        stageTime = 0;
-uint16_t                        TimeWhirlPool = 0;
-uint32_t                        TimeLeft = 0;
-uint32_t                        TimeSpent = 0;
-uint32_t                        SecsCount = 0;
-uint32_t                        pumpTime = 0;
-uint32_t                        TimeBrewing = 0;
-uint16_t                        Steady = 0;
-bool                            _NewMinute = false;
-bool                            _UseHLT = false;
-bool				_Prompt = false;
+int	    			BoilPower = 100;		///< Boil power 0..100%
+int				LastMashStep = 0;		///< Last valid mash step
+char        			temp_buf[64];			///< Temporary buffer
+char				logline[128];			///< Log line buffer
+char				strftime_buf[64];		///< Time buffer
+bool        			loop;				///< Loop flag
+bool				CoolBeep = false;		///< Did beep during cooling
+bool				Resume = false;			///< Resume brew flag
+bool				pumpRest = false;		///< Pump is resting
+bool				updateRuntime = false;		///< Update runtime record
+bool        			NewMinute = false;		///< We have a new minute
+bool				TempReached = false;		///< Temperature is reached
+uint8_t     			MashState = MASH_NONE;		///< Mash states
+float       			temp_MLT;			///< MLT temperature
+float				MinMash = 38.0;			///< Minimum edit value
+float				MaxMash = 80.0;			///< Maximum edit value
+uint32_t    			power_MLT = 0;			///< MLT power
+uint32_t			power_HLT = 0;			///< HLT power
+uint32_t			counts = 0;			///< Counter for power average
+float                           stageTemp = 0.0;		///< Current stage temperature
+uint16_t                        stageTime = 0;			///< Current stage timer
+uint16_t                        TimeWhirlPool = 0;		///< Whirlpool timer
+uint32_t                        TimeLeft = 0;			///< Tie left in this stage
+uint32_t                        TimeSpent = 0;			///< Tota time spent
+uint32_t                        SecsCount = 0;			///< Seconds counter
+uint32_t                        pumpTime = 0;			///< Pump running time
+uint32_t                        TimeBrewing = 0;		///< Brewing time elapsed
+uint16_t                        Steady = 0;			///< Temperature is steady
+bool                            _NewMinute = false;		///< New minute slave flag
+bool                            _UseHLT = false;		///< Use HLT slave flag
+bool				_Prompt = false;		///< Prompt display flag
 
-extern bool			System_TimeOk;
-extern sButton			Buttons[MAXBUTTONS];
-extern int			Main_Screen;
-extern DS18B20_State            *ds18b20_state;
-extern DRIVER_State             *driver_state;
-extern SemaphoreHandle_t        xSemaphoreDS18B20;
-extern SemaphoreHandle_t        xSemaphoreDriver;
-extern double                   Output;
-extern time_t			now;
-extern struct tm		timeinfo;
+extern bool			System_TimeOk;			///< System time is valid
+extern sButton			Buttons[MAXBUTTONS];		///< Buttons definitions
+extern int			Main_Screen;			///< Current screen
+extern DS18B20_State            *ds18b20_state;			///< DS18B20 state
+extern DRIVER_State             *driver_state;			///< Relays driver state
+extern SemaphoreHandle_t        xSemaphoreDS18B20;		///< DS18B20 lock semaphore
+extern SemaphoreHandle_t        xSemaphoreDriver;		///< Relays driver lock semaphore
+extern double                   Output;				///< Cakculated outpout power
+extern time_t			now;				///< Current time
+extern struct tm		timeinfo;			///< Current time structure
 
 #ifdef CONFIG_TEMP_SENSORS_SIMULATOR
 extern float                    Fake_MLT;