LED Switch and minor config update

Marlin/Configuration.h

@@ -1162,7 +1162,7 @@
 
 // Travel limits (mm) after homing, corresponding to endstop positions.
 #define X_MIN_POS 0
-#define Y_MIN_POS -4
+#define Y_MIN_POS -2
 #define Z_MIN_POS 0
 #define X_MAX_POS X_BED_SIZE + X_MIN_POS
 #define Y_MAX_POS Y_BED_SIZE + Y_MIN_POS

Marlin/Configuration_adv.h

@@ -1612,9 +1612,9 @@
   #define BABYSTEP_ALWAYS_AVAILABLE       // Allow babystepping at all times (not just during movement).
   //#define BABYSTEP_XY                     // Also enable X/Y Babystepping. Not supported on DELTA!
   #define BABYSTEP_INVERT_Z false           // Change if Z babysteps should go the other way
-  //#define BABYSTEP_MILLIMETER_UNITS       // Specify BABYSTEP_MULTIPLICATOR_(XY|Z) in mm instead of micro-steps
-  #define BABYSTEP_MULTIPLICATOR_Z  10       // (steps or mm) Steps or millimeter distance for each Z babystep
-  #define BABYSTEP_MULTIPLICATOR_XY 10       // (steps or mm) Steps or millimeter distance for each XY babystep
+  #define BABYSTEP_MILLIMETER_UNITS       // Specify BABYSTEP_MULTIPLICATOR_(XY|Z) in mm instead of micro-steps
+  #define BABYSTEP_MULTIPLICATOR_Z   0.01       // (steps or mm) Steps or millimeter distance for each Z babystep
+  //#define BABYSTEP_MULTIPLICATOR_XY 10       // (steps or mm) Steps or millimeter distance for each XY babystep
 
   #define DOUBLECLICK_FOR_Z_BABYSTEPPING  // Double-click on the Status Screen for Z Babystepping.
   #if ENABLED(DOUBLECLICK_FOR_Z_BABYSTEPPING)

Marlin/src/MarlinCore.cpp

@@ -268,6 +268,11 @@ bool wait_for_heatup = true;
  * ******************************** FUNCTIONS ********************************
  * ***************************************************************************
  */
+#ifdef LED_SW_PIN
+  void setup_LED_SW_pin() {
+    SET_INPUT_PULLDOWN(LED_SW_PIN);
+  }
+#endif
 
 void setup_killpin() {
   #if HAS_KILL
@@ -559,6 +564,20 @@ inline void manage_inactivity(const bool ignore_stepper_queue=false) {
     }
   #endif
 
+  #ifdef LED_SW_PIN
+    static int LedSw_Count = 0;   // make the inactivity button a bit less responsive
+    const int LED_SW_DELAY = 100;
+    bool led_pin_status = !READ(LED_SW_PIN);
+    if (led_pin_status && LedSw_Count <= LED_SW_DELAY)
+      LedSw_Count++;
+    else if (!led_pin_status)
+      LedSw_Count = 0;
+    if (LedSw_Count == LED_SW_DELAY){
+      caselight.on = !caselight.on;
+      caselight.update(true);
+    }
+  #endif
+
   #if HAS_HOME
     // Handle a standalone HOME button
     constexpr millis_t HOME_DEBOUNCE_DELAY = 1000UL;
@@ -1001,6 +1020,10 @@ void setup() {
   #endif
 
   SETUP_RUN(setup_killpin());
+  
+  #ifdef LED_SW_PIN
+    SETUP_RUN(setup_LED_SW_pin());
+  #endif
 
   #if HAS_TMC220x
     SETUP_RUN(tmc_serial_begin());

Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO.h

@@ -168,7 +168,12 @@ BlTouch
   //#define POWER_LOSS_PIN                  PA2   // PW_DET
   //#define PS_ON_PIN                       PB2   // PW_OFF
   #define FIL_RUNOUT_PIN                    PA4
-  #define FIL_RUNOUT2_PIN                   PE6
+  #ifdef CASE_LED_INSTEAD_E1
+    //#define LED_SW_PIN                      PE6
+  #endif
+  #ifndef LED_SW_PIN
+    #define FIL_RUNOUT2_PIN                 PE6
+  #endif
 #endif
 
 //

Marlin/src/pins/stm32f1/pins_MKS_ROBIN_NANO_V2.h

@@ -236,7 +236,12 @@ https://easyeda.com/sst78rust/fb4s-led-control
   //#define POWER_LOSS_PIN                  PA2   // PW_DET
   //#define PS_ON_PIN                       PB2   // PW_OFF
   #define FIL_RUNOUT_PIN                    PA4
-  #define FIL_RUNOUT2_PIN                   PE6
+  #ifdef CASE_LED_INSTEAD_E1
+    #define LED_SW_PIN                      PE6
+  #endif
+  #ifndef LED_SW_PIN
+    #define FIL_RUNOUT2_PIN                 PE6
+  #endif
 #endif
 
 #define SERVO0_PIN                          PA8   // Enable BLTOUCH