Fix compiler warnings

- Patched up for most included configurations

Marlin/ConfigurationStore.cpp

@@ -263,8 +263,6 @@ void Config_StoreSettings()  {
     EEPROM_WRITE_VAR(i, dummy);
   }
 
-  int storageSize = i;
-
   char ver2[4] = EEPROM_VERSION;
   int j = EEPROM_OFFSET;
   EEPROM_WRITE_VAR(j, ver2); // validate data
@@ -446,7 +444,7 @@ void Config_ResetDefault() {
   float tmp1[] = DEFAULT_AXIS_STEPS_PER_UNIT;
   float tmp2[] = DEFAULT_MAX_FEEDRATE;
   long tmp3[] = DEFAULT_MAX_ACCELERATION;
-  for (int i = 0; i < NUM_AXIS; i++) {
+  for (uint16_t i = 0; i < NUM_AXIS; i++) {
     axis_steps_per_unit[i] = tmp1[i];
     max_feedrate[i] = tmp2[i];
     max_acceleration_units_per_sq_second[i] = tmp3[i];

Marlin/Marlin_main.cpp

@@ -937,19 +937,22 @@ void get_command()
 
 }
 
-
+float code_value() {
-float code_value()
+  float ret;
-{
+  char *e = strchr(strchr_pointer, 'E');
-  return (strtod(strchr_pointer + 1, NULL));
+  if (e) {
+    *e = 0;
+    ret = strtod(strchr_pointer+1, NULL);
+    *e = 'E';
   }
-
+  else
-long code_value_long()
+    ret = strtod(strchr_pointer+1, NULL);
-{
+  return ret;
-  return (strtol(strchr_pointer + 1, NULL, 10));
 }
 
-bool code_seen(char code)
+long code_value_long() { return (strtol(strchr_pointer + 1, NULL, 10)); }
-{
+
+bool code_seen(char code) {
   strchr_pointer = strchr(cmdbuffer[bufindr], code);
   return (strchr_pointer != NULL);  //Return True if a character was found
 }
@@ -1008,6 +1011,7 @@ XYZ_CONSTS_FROM_CONFIG(signed char, home_dir,  HOME_DIR);
 #endif //DUAL_X_CARRIAGE
 
 static void axis_is_at_home(int axis) {
+
   #ifdef DUAL_X_CARRIAGE
     if (axis == X_AXIS) {
       if (active_extruder != 0) {
@@ -1016,7 +1020,7 @@ static void axis_is_at_home(int axis) {
         max_pos[X_AXIS] = max(extruder_offset[X_AXIS][1], X2_MAX_POS);
         return;
       }
-    else if (dual_x_carriage_mode == DXC_DUPLICATION_MODE && active_extruder == 0) {
+      else if (dual_x_carriage_mode == DXC_DUPLICATION_MODE) {
         current_position[X_AXIS] = base_home_pos(X_AXIS) + home_offset[X_AXIS];
         min_pos[X_AXIS] = base_min_pos(X_AXIS) + home_offset[X_AXIS];
         max_pos[X_AXIS] = min(base_max_pos(X_AXIS) + home_offset[X_AXIS],
@@ -1025,17 +1029,14 @@ static void axis_is_at_home(int axis) {
       }
     }
   #endif
+
   #ifdef SCARA
     float homeposition[3];
-   char i;
    
-   if (axis < 2)
+    if (axis < 2) {
-   {
+
+      for (int i = 0; i < 3; i++) homeposition[i] = base_home_pos(i);
 
-     for (i=0; i<3; i++)
-     {
-        homeposition[i] = base_home_pos(i); 
-     }  
       // SERIAL_ECHOPGM("homeposition[x]= "); SERIAL_ECHO(homeposition[0]);
       // SERIAL_ECHOPGM("homeposition[y]= "); SERIAL_ECHOLN(homeposition[1]);
       // Works out real Homeposition angles using inverse kinematics, 
@@ -1045,10 +1046,7 @@ static void axis_is_at_home(int axis) {
       // SERIAL_ECHOPGM("base Theta= "); SERIAL_ECHO(delta[X_AXIS]);
       // SERIAL_ECHOPGM(" base Psi+Theta="); SERIAL_ECHOLN(delta[Y_AXIS]);
      
-     for (i=0; i<2; i++)
+      for (int i = 0; i < 2; i++) delta[i] -= home_offset[i];
-     {
-        delta[i] -= home_offset[i];
-     } 
      
       // SERIAL_ECHOPGM("addhome X="); SERIAL_ECHO(home_offset[X_AXIS]);
       // SERIAL_ECHOPGM(" addhome Y="); SERIAL_ECHO(home_offset[Y_AXIS]);
@@ -1067,8 +1065,7 @@ static void axis_is_at_home(int axis) {
       min_pos[axis] = base_min_pos(axis); // + (delta[axis] - base_home_pos(axis));
       max_pos[axis] = base_max_pos(axis); // + (delta[axis] - base_home_pos(axis));
     } 
-   else
+    else {
-   {
       current_position[axis] = base_home_pos(axis) + home_offset[axis];
       min_pos[axis] = base_min_pos(axis) + home_offset[axis];
       max_pos[axis] = base_max_pos(axis) + home_offset[axis];

Marlin/configurator/config/language.h

@@ -34,7 +34,6 @@
 #endif
 
 #define PROTOCOL_VERSION "1.0"
-#define FIRMWARE_URL "https://github.com/MarlinFirmware/Marlin"
 
 #if MB(ULTIMAKER)|| MB(ULTIMAKER_OLD)|| MB(ULTIMAIN_2)
   #define MACHINE_NAME "Ultimaker"
@@ -59,6 +58,7 @@
   #define FIRMWARE_URL "http://www.bq.com/gb/downloads-prusa-i3-hephestos.html"
 #else // Default firmware set to Mendel
   #define MACHINE_NAME "Mendel"
+  #define FIRMWARE_URL "https://github.com/MarlinFirmware/Marlin"
 #endif
 
 #ifdef CUSTOM_MENDEL_NAME

Marlin/example_configurations/SCARA/Configuration_adv.h

@@ -275,13 +275,9 @@
 
 #ifdef ADVANCE
   #define EXTRUDER_ADVANCE_K .0
-
   #define D_FILAMENT 1.75
   #define STEPS_MM_E 1000
-  #define EXTRUSION_AREA (0.25 * D_FILAMENT * D_FILAMENT * 3.14159)
+#endif
-  #define STEPS_PER_CUBIC_MM_E (axis_steps_per_unit[E_AXIS]/ EXTRUSION_AREA)
-
-#endif // ADVANCE
 
 // Arc interpretation settings:
 #define MM_PER_ARC_SEGMENT 1

Marlin/language.h

@@ -40,12 +40,14 @@
 #define FIRMWARE_URL "https://github.com/MarlinFirmware/Marlin"
 
 #if MB(ULTIMAKER)|| MB(ULTIMAKER_OLD)|| MB(ULTIMAIN_2)
+  #undef FIRMWARE_URL
   #define MACHINE_NAME "Ultimaker"
   #define FIRMWARE_URL "http://firmware.ultimaker.com"
 #elif MB(RUMBA)
   #define MACHINE_NAME "Rumba"
 #elif MB(3DRAG)
   #define MACHINE_NAME "3Drag"
+  #undef FIRMWARE_URL
   #define FIRMWARE_URL "http://3dprint.elettronicain.it/"
 #elif MB(K8200)
   #define MACHINE_NAME "K8200"
@@ -53,12 +55,15 @@
   #define MACHINE_NAME "Makibox"
 #elif MB(SAV_MKI)
   #define MACHINE_NAME "SAV MkI"
+  #undef FIRMWARE_URL
   #define FIRMWARE_URL "https://github.com/fmalpartida/Marlin/tree/SAV-MkI-config"
 #elif MB(WITBOX)
   #define MACHINE_NAME "WITBOX"
+  #undef FIRMWARE_URL
   #define FIRMWARE_URL "http://www.bq.com/gb/downloads-witbox.html"
 #elif MB(HEPHESTOS)
   #define MACHINE_NAME "HEPHESTOS"
+  #undef FIRMWARE_URL
   #define FIRMWARE_URL "http://www.bq.com/gb/downloads-prusa-i3-hephestos.html"
 #else // Default firmware set to Mendel
   #define MACHINE_NAME "Mendel"

Marlin/pins.h

@@ -127,10 +127,13 @@
 #define _E3_PINS
 
 #if EXTRUDERS > 1
+  #undef _E1_PINS
   #define _E1_PINS E1_STEP_PIN, E1_DIR_PIN, E1_ENABLE_PIN, HEATER_1_PIN, analogInputToDigitalPin(TEMP_1_PIN),
   #if EXTRUDERS > 2
+    #undef _E2_PINS
     #define _E2_PINS E2_STEP_PIN, E2_DIR_PIN, E2_ENABLE_PIN, HEATER_2_PIN, analogInputToDigitalPin(TEMP_2_PIN),
     #if EXTRUDERS > 3
+      #undef _E3_PINS
       #define _E3_PINS E3_STEP_PIN, E3_DIR_PIN, E3_ENABLE_PIN, HEATER_3_PIN, analogInputToDigitalPin(TEMP_3_PIN),
     #endif
   #endif

Marlin/pins_3DRAG.h

@@ -4,18 +4,25 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef Z_ENABLE_PIN
 #define Z_ENABLE_PIN       63
 
+#undef X_MAX_PIN
+#undef Y_MAX_PIN
+#undef Z_MAX_PIN
 #define X_MAX_PIN          2
 #define Y_MAX_PIN          15
 #define Z_MAX_PIN          -1
 
+#undef SDSS
 #define SDSS               25//53
 
-#define BEEPER             33
+#undef FAN_PIN
-
 #define FAN_PIN            8
 
+#undef HEATER_1_PIN
+#undef HEATER_2_PIN
+#undef HEATER_BED_PIN
 #define HEATER_0_PIN       10
 #define HEATER_1_PIN       12
 #define HEATER_2_PIN       6
@@ -23,8 +30,15 @@
 #define HEATER_BED_PIN     9    // BED
 
 #if defined(ULTRA_LCD) && defined(NEWPANEL)
+  #undef BEEPER
   #define BEEPER -1
 
+  #undef LCD_PINS_RS
+  #undef LCD_PINS_ENABLE
+  #undef LCD_PINS_D4
+  #undef LCD_PINS_D5
+  #undef LCD_PINS_D6
+  #undef LCD_PINS_D7
   #define LCD_PINS_RS 27
   #define LCD_PINS_ENABLE 29
   #define LCD_PINS_D4 37
@@ -33,7 +47,15 @@
   #define LCD_PINS_D7 31
 
   // Buttons
+  #undef BTN_EN1
+  #undef BTN_EN2
+  #undef BTN_ENC
   #define BTN_EN1 16
   #define BTN_EN2 17
   #define BTN_ENC 23 //the click
+
+#else
+
+  #define BEEPER 33
+
 #endif // ULTRA_LCD && NEWPANEL

Marlin/pins_5DPRINT.h

@@ -64,6 +64,15 @@
 // Microstepping pins
 // Note that the pin mapping is not from fastio.h
 // See Sd2PinMap.h for the pin configurations
+
+#undef X_MS1_PIN
+#undef X_MS2_PIN
+#undef Y_MS1_PIN
+#undef Y_MS2_PIN
+#undef Z_MS1_PIN
+#undef Z_MS2_PIN
+#undef E0_MS1_PIN
+#undef E0_MS2_PIN
 #define X_MS1_PIN 25
 #define X_MS2_PIN 26
 #define Y_MS1_PIN 9

Marlin/pins_AZTEEG_X3.h

@@ -4,7 +4,10 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef FAN_PIN
 #define FAN_PIN            9 // (Sprinter config)
+
+#undef HEATER_1_PIN
 #define HEATER_1_PIN       -1
 
 #ifdef TEMP_STAT_LEDS

Marlin/pins_AZTEEG_X3_PRO.h

@@ -4,7 +4,9 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef FAN_PIN
 #define FAN_PIN             9 // (Sprinter config)
+
 #define BEEPER             33
 
 #define E2_STEP_PIN        23
@@ -19,6 +21,9 @@
 #define E4_DIR_PIN         37
 #define E4_ENABLE_PIN      42
 
+#undef HEATER_1_PIN
+#undef HEATER_2_PIN
+#undef HEATER_3_PIN
 #define HEATER_1_PIN       -1
 #define HEATER_2_PIN       16
 #define HEATER_3_PIN       17
@@ -27,6 +32,8 @@
 #define HEATER_6_PIN        6
 #define HEATER_7_PIN       11
 
+#undef TEMP_2_PIN
+#undef TEMP_3_PIN
 #define TEMP_2_PIN         12   // ANALOG NUMBERING
 #define TEMP_3_PIN         11   // ANALOG NUMBERING
 #define TEMP_4_PIN         10   // ANALOG NUMBERING

Marlin/pins_BAM_DICE_DUE.h

@@ -4,8 +4,13 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef FAN_PIN
 #define FAN_PIN             9 // (Sprinter config)
+
+#undef HEATER_1_PIN
 #define HEATER_1_PIN       -1
 
+#undef TEMP_0_PIN
+#undef TEMP_1_PIN
 #define TEMP_0_PIN          9 // ANALOG NUMBERING
 #define TEMP_1_PIN         11 // ANALOG NUMBERING

Marlin/pins_FELIX2.h

@@ -4,13 +4,23 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef X_MAX_PIN
+#undef Y_MAX_PIN
+#undef Z_MAX_PIN
 #define X_MAX_PIN          -1
 #define Y_MAX_PIN          -1
 #define Z_MAX_PIN          -1
 
+#undef Y2_STEP_PIN
+#undef Y2_DIR_PIN
+#undef Y2_ENABLE_PIN
 #define Y2_STEP_PIN        -1
 #define Y2_DIR_PIN         -1
 #define Y2_ENABLE_PIN      -1
+
+#undef Z2_STEP_PIN
+#undef Z2_DIR_PIN
+#undef Z2_ENABLE_PIN
 #define Z2_STEP_PIN        -1
 #define Z2_DIR_PIN         -1
 #define Z2_ENABLE_PIN      -1
@@ -19,11 +29,14 @@
 #define E1_DIR_PIN         34
 #define E1_ENABLE_PIN      30
 
+#undef SDPOWER
 #define SDPOWER             1
 
+#undef FAN_PIN
 #define FAN_PIN             9 // (Sprinter config)
 #define PS_ON_PIN          12
 
+#undef HEATER_1_PIN
 #define HEATER_1_PIN        7 // EXTRUDER 2
 
 #if defined(ULTRA_LCD) && defined(NEWPANEL)

Marlin/pins_HEPHESTOS.h

@@ -4,5 +4,8 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef FAN_PIN
 #define FAN_PIN             9 // (Sprinter config)
+
+#undef HEATER_1_PIN
 #define HEATER_1_PIN       -1

Marlin/pins_WITBOX.h

@@ -4,5 +4,8 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef FAN_PIN
 #define FAN_PIN             9 // (Sprinter config)
+
+#undef HEATER_1_PIN
 #define HEATER_1_PIN       -1

Marlin/stepper.cpp

@@ -97,11 +97,19 @@ static volatile bool endstop_z_hit = false;
 #if defined(Y_MAX_PIN) && Y_MAX_PIN >= 0
   static bool old_y_max_endstop = false;
 #endif
-
+#if defined(Z_MIN_PIN) && Z_MIN_PIN >= 0
-static bool old_z_min_endstop = false, old_z_max_endstop = false;
+  static bool old_z_min_endstop = false;
-
+#endif
+#if defined(Z_MAX_PIN) && Z_MAX_PIN >= 0
+  static bool old_z_max_endstop = false;
+#endif
 #ifdef Z_DUAL_ENDSTOPS
-  static bool old_z2_min_endstop = false, old_z2_max_endstop = false;
+  #if defined(Z2_MIN_PIN) && Z2_MIN_PIN >= 0
+    static bool old_z2_min_endstop = false;
+  #endif
+  #if defined(Z2_MAX_PIN) && Z2_MAX_PIN >= 0
+    static bool old_z2_max_endstop = false;
+  #endif
 #endif
 
 static bool check_endstops = true;

Marlin/temperature.cpp

@@ -586,7 +586,9 @@ void manage_heater() {
     if (ct < max(HEATER_0_MINTEMP, 0.01)) min_temp_error(0);
   #endif //HEATER_0_USES_MAX6675
 
+  #if defined(WATCH_TEMP_PERIOD) || !defined(PIDTEMPBED) || HAS_AUTO_FAN
     unsigned long ms = millis();
+  #endif
 
   // Loop through all extruders
   for (int e = 0; e < EXTRUDERS; e++) {

Marlin/ultralcd.cpp

@@ -25,10 +25,6 @@ int absPreheatFanSpeed;
   unsigned long message_millis = 0;
 #endif
 
-#ifdef ULTIPANEL
-  static float manual_feedrate[] = MANUAL_FEEDRATE;
-#endif // ULTIPANEL
-
 /* !Configuration settings */
 
 //Function pointer to menu functions.
@@ -43,10 +39,13 @@ char lcd_status_message[LCD_WIDTH+1] = WELCOME_MSG;
   #include "ultralcd_implementation_hitachi_HD44780.h"
 #endif
 
-/* Different menus */
+// The main status screen
 static void lcd_status_screen();
+
 #ifdef ULTIPANEL
+
   extern bool powersupply;
+  static float manual_feedrate[] = MANUAL_FEEDRATE;
   static void lcd_main_menu();
   static void lcd_tune_menu();
   static void lcd_prepare_menu();
@@ -67,14 +66,14 @@ static void lcd_sdcard_menu();
 
   #ifdef DELTA_CALIBRATION_MENU
     static void lcd_delta_calibrate_menu();
-#endif // DELTA_CALIBRATION_MENU
+  #endif
 
   #if defined(MANUAL_BED_LEVELING)
     #include "mesh_bed_leveling.h"
     static void _lcd_level_bed();
     static void _lcd_level_bed_homing();
     static void lcd_level_bed();
-#endif  // MANUAL_BED_LEVELING
+  #endif
 
   static void lcd_quick_feedback();//Cause an LCD refresh, and give the user visual or audible feedback that something has happened
 
@@ -210,12 +209,12 @@ static void menu_action_setting_edit_callback_long5(const char* pstr, unsigned l
 
   /** Used variables to keep track of the menu */
   #ifndef REPRAPWORLD_KEYPAD
-volatile uint8_t buttons;//Contains the bits of the currently pressed buttons.
+    volatile uint8_t buttons; // Bits of the pressed buttons.
   #else
-volatile uint8_t buttons_reprapworld_keypad; // to store the reprapworld_keypad shift register values
+    volatile uint8_t buttons_reprapworld_keypad; // The reprapworld_keypad shift register values
   #endif
   #ifdef LCD_HAS_SLOW_BUTTONS
-volatile uint8_t slow_buttons;//Contains the bits of the currently pressed buttons.
+    volatile uint8_t slow_buttons; // Bits of the pressed buttons.
   #endif
   uint8_t currentMenuViewOffset;              /* scroll offset in the current menu */
   uint32_t blocking_enc;
@@ -224,6 +223,7 @@ uint32_t encoderPosition;
   #if (SDCARDDETECT > 0)
     bool lcd_oldcardstatus;
   #endif
+
 #endif // ULTIPANEL
 
 menuFunc_t currentMenu = lcd_status_screen; /* function pointer to the currently active menu */
@@ -520,22 +520,21 @@ void _lcd_preheat(int endnum, const float temph, const float tempb, const int fa
 void lcd_preheat_pla0() { _lcd_preheat(0, plaPreheatHotendTemp, plaPreheatHPBTemp, plaPreheatFanSpeed); }
 void lcd_preheat_abs0() { _lcd_preheat(0, absPreheatHotendTemp, absPreheatHPBTemp, absPreheatFanSpeed); }
 
-#if TEMP_SENSOR_1 != 0 //2nd extruder preheat
+#if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_3 != 0 || TEMP_SENSOR_BED != 0 //more than one extruder present
+
+  #if TEMP_SENSOR_1 != 0
     void lcd_preheat_pla1() { _lcd_preheat(1, plaPreheatHotendTemp, plaPreheatHPBTemp, plaPreheatFanSpeed); }
     void lcd_preheat_abs1() { _lcd_preheat(1, absPreheatHotendTemp, absPreheatHPBTemp, absPreheatFanSpeed); }
-#endif //2nd extruder preheat
+  #endif
-
+  #if TEMP_SENSOR_2 != 0
-#if TEMP_SENSOR_2 != 0 //3 extruder preheat
     void lcd_preheat_pla2() { _lcd_preheat(2, plaPreheatHotendTemp, plaPreheatHPBTemp, plaPreheatFanSpeed); }
     void lcd_preheat_abs2() { _lcd_preheat(2, absPreheatHotendTemp, absPreheatHPBTemp, absPreheatFanSpeed); }
-#endif //3 extruder preheat
+  #endif
-
+  #if TEMP_SENSOR_3 != 0
-#if TEMP_SENSOR_3 != 0 //4 extruder preheat
     void lcd_preheat_pla3() { _lcd_preheat(3, plaPreheatHotendTemp, plaPreheatHPBTemp, plaPreheatFanSpeed); }
     void lcd_preheat_abs3() { _lcd_preheat(3, absPreheatHotendTemp, absPreheatHPBTemp, absPreheatFanSpeed); }
-#endif //4 extruder preheat
+  #endif
 
-#if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_3 != 0 //more than one extruder present
   void lcd_preheat_pla0123() {
     setTargetHotend0(plaPreheatHotendTemp);
     setTargetHotend1(plaPreheatHotendTemp);
@@ -548,7 +547,8 @@ void lcd_preheat_abs0() { _lcd_preheat(0, absPreheatHotendTemp, absPreheatHPBTem
     setTargetHotend2(absPreheatHotendTemp);
     _lcd_preheat(3, absPreheatHotendTemp, absPreheatHPBTemp, absPreheatFanSpeed);
   }
-#endif //more than one extruder present
+
+  #if TEMP_SENSOR_0 != 0
 
     void lcd_preheat_pla_bedonly() { _lcd_preheat(0, 0, plaPreheatHPBTemp, plaPreheatFanSpeed); }
     void lcd_preheat_abs_bedonly() { _lcd_preheat(0, 0, absPreheatHPBTemp, absPreheatFanSpeed); }
@@ -557,18 +557,16 @@ static void lcd_preheat_pla_menu() {
       START_MENU();
       MENU_ITEM(back, MSG_PREPARE, lcd_prepare_menu);
       MENU_ITEM(function, MSG_PREHEAT_PLA_N MSG_H1, lcd_preheat_pla0);
-  #if TEMP_SENSOR_1 != 0 //2 extruder preheat
+      #if TEMP_SENSOR_1 != 0
         MENU_ITEM(function, MSG_PREHEAT_PLA_N MSG_H2, lcd_preheat_pla1);
-  #endif //2 extruder preheat
+      #endif
-  #if TEMP_SENSOR_2 != 0 //3 extruder preheat
+      #if TEMP_SENSOR_2 != 0
         MENU_ITEM(function, MSG_PREHEAT_PLA_N MSG_H3, lcd_preheat_pla2);
-  #endif //3 extruder preheat
+      #endif
-  #if TEMP_SENSOR_3 != 0 //4 extruder preheat
+      #if TEMP_SENSOR_3 != 0
         MENU_ITEM(function, MSG_PREHEAT_PLA_N MSG_H4, lcd_preheat_pla3);
-  #endif //4 extruder preheat
+      #endif
-  #if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_3 != 0 //all extruder preheat
       MENU_ITEM(function, MSG_PREHEAT_PLA_ALL, lcd_preheat_pla0123);
-  #endif //all extruder preheat
       #if TEMP_SENSOR_BED != 0
         MENU_ITEM(function, MSG_PREHEAT_PLA_BEDONLY, lcd_preheat_pla_bedonly);
       #endif
@@ -579,23 +577,24 @@ static void lcd_preheat_abs_menu() {
       START_MENU();
       MENU_ITEM(back, MSG_PREPARE, lcd_prepare_menu);
       MENU_ITEM(function, MSG_PREHEAT_ABS_N MSG_H1, lcd_preheat_abs0);
-  #if TEMP_SENSOR_1 != 0 //2 extruder preheat
+      #if TEMP_SENSOR_1 != 0
         MENU_ITEM(function, MSG_PREHEAT_ABS_N MSG_H2, lcd_preheat_abs1);
-  #endif //2 extruder preheat
+      #endif
-  #if TEMP_SENSOR_2 != 0 //3 extruder preheat
+      #if TEMP_SENSOR_2 != 0
         MENU_ITEM(function, MSG_PREHEAT_ABS_N MSG_H3, lcd_preheat_abs2);
-  #endif //3 extruder preheat
+      #endif
-  #if TEMP_SENSOR_3 != 0 //4 extruder preheat
+      #if TEMP_SENSOR_3 != 0
         MENU_ITEM(function, MSG_PREHEAT_ABS_N MSG_H4, lcd_preheat_abs3);
-  #endif //4 extruder preheat
+      #endif
-  #if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_3 != 0 //all extruder preheat
       MENU_ITEM(function, MSG_PREHEAT_ABS_ALL, lcd_preheat_abs0123);
-  #endif //all extruder preheat
       #if TEMP_SENSOR_BED != 0
         MENU_ITEM(function, MSG_PREHEAT_ABS_BEDONLY, lcd_preheat_abs_bedonly);
       #endif
       END_MENU();
     }
+  #endif
+
+#endif // more than one temperature sensor present
 
 void lcd_cooldown() {
   setTargetHotend0(0);
@@ -618,7 +617,7 @@ static void lcd_prepare_menu() {
   MENU_ITEM(function, MSG_SET_HOME_OFFSETS, lcd_set_home_offsets);
   //MENU_ITEM(gcode, MSG_SET_ORIGIN, PSTR("G92 X0 Y0 Z0"));
   #if TEMP_SENSOR_0 != 0
-    #if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_BED != 0
+    #if TEMP_SENSOR_1 != 0 || TEMP_SENSOR_2 != 0 || TEMP_SENSOR_3 != 0 || TEMP_SENSOR_BED != 0
       MENU_ITEM(submenu, MSG_PREHEAT_PLA, lcd_preheat_pla_menu);
       MENU_ITEM(submenu, MSG_PREHEAT_ABS, lcd_preheat_abs_menu);
     #else