Extend RGB LED support, adding Printer Events

Marlin/Conditionals_LCD.h

@@ -386,5 +386,6 @@
 
   #define HAS_SOFTWARE_ENDSTOPS (ENABLED(MIN_SOFTWARE_ENDSTOPS) || ENABLED(MAX_SOFTWARE_ENDSTOPS))
   #define HAS_RESUME_CONTINUE (ENABLED(NEWPANEL) || ENABLED(EMERGENCY_PARSER))
+  #define HAS_COLOR_LEDS (ENABLED(BLINKM) || ENABLED(RGB_LED))
 
 #endif //CONDITIONALS_LCD_H

Marlin/Configuration.h

@@ -1514,7 +1514,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1522,6 +1538,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/Marlin_main.cpp

@@ -945,6 +945,31 @@ void servo_init() {
 
 #endif
 
+#if HAS_COLOR_LEDS
+
+  void set_led_color(const uint8_t r, const uint8_t g, const uint8_t b) {
+
+    #if ENABLED(BLINKM)
+
+      // This variant uses i2c to send the RGB components to the device.
+      SendColors(r, g, b);
+
+    #else
+
+      // This variant uses 3 separate pins for the RGB components.
+      // If the pins can do PWM then their intensity will be set.
+      digitalWrite(RGB_LED_R_PIN, r ? HIGH : LOW);
+      digitalWrite(RGB_LED_G_PIN, g ? HIGH : LOW);
+      digitalWrite(RGB_LED_B_PIN, b ? HIGH : LOW);
+      analogWrite(RGB_LED_R_PIN, r);
+      analogWrite(RGB_LED_G_PIN, g);
+      analogWrite(RGB_LED_B_PIN, b);
+
+    #endif
+  }
+
+#endif // HAS_COLOR_LEDS
+
 void gcode_line_error(const char* err, bool doFlush = true) {
   SERIAL_ERROR_START;
   serialprintPGM(err);
@@ -1129,6 +1154,19 @@ inline void get_serial_commands() {
         if (card_eof) {
           SERIAL_PROTOCOLLNPGM(MSG_FILE_PRINTED);
           card.printingHasFinished();
+          #if ENABLED(PRINTER_EVENT_LEDS)
+            LCD_MESSAGEPGM(MSG_INFO_COMPLETED_PRINTS);
+            set_led_color(0, 255, 0);
+            #if HAS_RESUME_CONTINUE
+              KEEPALIVE_STATE(PAUSED_FOR_USER);
+              wait_for_user = true;
+              while (wait_for_user) idle();
+              KEEPALIVE_STATE(IN_HANDLER);
+            #else
+              safe_delay(1000);
+            #endif
+            set_led_color(0, 0, 0);
+          #endif
           card.checkautostart(true);
         }
         else if (n == -1) {
@@ -6084,6 +6122,11 @@ inline void gcode_M109() {
 
   KEEPALIVE_STATE(NOT_BUSY);
 
+  #if ENABLED(PRINTER_EVENT_LEDS)
+    const float start_temp = thermalManager.degHotend(target_extruder);
+    uint8_t old_blue = 0;
+  #endif
+
   do {
     // Target temperature might be changed during the loop
     if (target_temp != thermalManager.degTargetHotend(target_extruder)) {
@@ -6117,6 +6160,14 @@ inline void gcode_M109() {
 
     const float temp = thermalManager.degHotend(target_extruder);
 
+    #if ENABLED(PRINTER_EVENT_LEDS)
+      // Gradually change LED strip from violet to red as nozzle heats up
+      if (!wants_to_cool) {
+        const uint8_t blue = map(constrain(temp, start_temp, target_temp), start_temp, target_temp, 255, 0);
+        if (blue != old_blue) set_led_color(255, 0, (old_blue = blue));
+      }
+    #endif
+
     #if TEMP_RESIDENCY_TIME > 0
 
       const float temp_diff = fabs(target_temp - temp);
@@ -6145,7 +6196,12 @@ inline void gcode_M109() {
 
   } while (wait_for_heatup && TEMP_CONDITIONS);
 
-  if (wait_for_heatup) LCD_MESSAGEPGM(MSG_HEATING_COMPLETE);
+  if (wait_for_heatup) {
+    LCD_MESSAGEPGM(MSG_HEATING_COMPLETE);
+    #if ENABLED(PRINTER_EVENT_LEDS)
+      set_led_color(255, 255, 255); // Set LEDs ALL WHITE
+    #endif
+  }
 
   KEEPALIVE_STATE(IN_HANDLER);
 }
@@ -6195,6 +6251,11 @@ inline void gcode_M109() {
 
     target_extruder = active_extruder; // for print_heaterstates
 
+    #if ENABLED(PRINTER_EVENT_LEDS)
+      const float start_temp = thermalManager.degBed();
+      uint8_t old_red = 255;
+    #endif
+
     do {
       // Target temperature might be changed during the loop
       if (target_temp != thermalManager.degTargetBed()) {
@@ -6228,6 +6289,15 @@ inline void gcode_M109() {
 
       const float temp = thermalManager.degBed();
 
+      #if ENABLED(PRINTER_EVENT_LEDS)
+        // Gradually change LED strip from blue to violet as bed heats up
+        if (!wants_to_cool) {
+          const uint8_t red = map(constrain(temp, start_temp, target_temp), start_temp, target_temp, 0, 255);
+          if (red != old_red) set_led_color((old_red = red), 0, 255);
+        }
+      }
+      #endif
+
       #if TEMP_BED_RESIDENCY_TIME > 0
 
         const float temp_diff = fabs(target_temp - temp);
@@ -6771,28 +6841,7 @@ inline void gcode_M121() { endstops.enable_globally(false); }
 
 #endif // PARK_HEAD_ON_PAUSE
 
-#if ENABLED(BLINKM) || ENABLED(RGB_LED)
-
-  void set_led_color(const uint8_t r, const uint8_t g, const uint8_t b) {
-
-    #if ENABLED(BLINKM)
-
-      // This variant uses i2c to send the RGB components to the device.
-      SendColors(r, g, b);
-
-    #else
-
-      // This variant uses 3 separate pins for the RGB components.
-      // If the pins can do PWM then their intensity will be set.
-      digitalWrite(RGB_LED_R_PIN, r ? HIGH : LOW);
-      digitalWrite(RGB_LED_G_PIN, g ? HIGH : LOW);
-      digitalWrite(RGB_LED_B_PIN, b ? HIGH : LOW);
-      analogWrite(RGB_LED_R_PIN, r);
-      analogWrite(RGB_LED_G_PIN, g);
-      analogWrite(RGB_LED_B_PIN, b);
-
-    #endif
-  }
+#if HAS_COLOR_LEDS
 
   /**
    * M150: Set Status LED Color - Use R-U-B for R-G-B
@@ -9388,7 +9437,7 @@ void process_next_command() {
           break;
       #endif
 
-      #if ENABLED(BLINKM) || ENABLED(RGB_LED)
+      #if HAS_COLOR_LEDS
 
         case 150: // M150: Set Status LED Color
           gcode_M150();

Marlin/SanityCheck.h

@@ -957,6 +957,8 @@ static_assert(1 >= 0
   #elif ENABLED(BLINKM)
     #error "RGB_LED and BLINKM are currently incompatible (both use M150)."
   #endif
+#elif DISABLED(BLINKM) && ENABLED(PRINTER_EVENT_LEDS)
+  #error "PRINTER_EVENT_LEDS requires BLINKM or RGB_LED."
 #endif
 
 /**

Marlin/example_configurations/Cartesio/Configuration.h

@@ -1513,7 +1513,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1521,6 +1537,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/Felix/Configuration.h

@@ -1497,7 +1497,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1505,6 +1521,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/Felix/DUAL/Configuration.h

@@ -1497,7 +1497,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1505,6 +1521,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/Hephestos/Configuration.h

@@ -1505,7 +1505,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1513,6 +1529,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/Hephestos_2/Configuration.h

@@ -1508,7 +1508,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1516,6 +1532,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/K8200/Configuration.h

@@ -1548,7 +1548,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1556,6 +1572,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/K8400/Configuration.h

@@ -1514,7 +1514,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1522,6 +1538,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/K8400/Dual-head/Configuration.h

@@ -1514,7 +1514,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1522,6 +1538,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h

@@ -1514,7 +1514,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1522,6 +1538,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/RigidBot/Configuration.h

@@ -1515,7 +1515,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1523,6 +1539,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/SCARA/Configuration.h

@@ -1529,7 +1529,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1537,6 +1553,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/TAZ4/Configuration.h

@@ -1534,7 +1534,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1542,6 +1558,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/TinyBoy2/Configuration.h

@@ -1570,7 +1570,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1578,6 +1594,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/WITBOX/Configuration.h

@@ -1505,7 +1505,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1513,6 +1529,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/adafruit/ST7565/Configuration.h

@@ -1514,7 +1514,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1522,6 +1538,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/delta/flsun_kossel_mini/Configuration.h

@@ -1630,7 +1630,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1638,6 +1654,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/delta/generic/Configuration.h

@@ -1616,7 +1616,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1624,6 +1640,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/delta/kossel_mini/Configuration.h

@@ -1612,7 +1612,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1620,6 +1636,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/delta/kossel_pro/Configuration.h

@@ -1620,7 +1620,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1628,6 +1644,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/delta/kossel_xl/Configuration.h

@@ -1627,7 +1627,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1635,6 +1651,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/makibox/Configuration.h

@@ -1517,7 +1517,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1525,6 +1541,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas

Marlin/example_configurations/tvrrug/Round2/Configuration.h

@@ -1510,7 +1510,23 @@
 //define BlinkM/CyzRgb Support
 //#define BLINKM
 
-// Support for an RGB LED using 3 separate pins with optional PWM
+/**
+ * RGB LED / LED Strip Control
+ *
+ * Enable support for an RGB LED connected to 5V digital pins, or
+ * an RGB Strip connected to MOSFETs controlled by digital pins.
+ *
+ * Adds the M150 command to set the LED (or LED strip) color. 
+ * If pins are PWM capable (e.g., 4, 5, 6, 11) then a range of
+ * luminance values can be set from 0 to 255.
+ *
+ * *** CAUTION ***
+ *  LED Strips require a MOFSET Chip between PWM lines and LEDs,
+ *  as the Arduino cannot handle the current the LEDs will require.
+ *  Failure to follow this precaution can destroy your Arduino!
+ * *** CAUTION ***
+ *
+ */
 //#define RGB_LED
 #if ENABLED(RGB_LED)
   #define RGB_LED_R_PIN 34
@@ -1518,6 +1534,21 @@
   #define RGB_LED_B_PIN 35
 #endif
 
+/**
+ * Printer Event LEDs
+ *
+ * During printing, the LEDs will reflect the printer status:
+ *
+ *  - Gradually change from blue to violet as the heated bed gets to target temp
+ *  - Gradually change from violet to red as the hotend gets to temperature
+ *  - Change to white to illuminate work surface
+ *  - Change to green once print has finished
+ *  - Turn off after the print has finished and the user has pushed a button
+ */
+#if ENABLED(BLINKM) || ENABLED(RGB_LED)
+  #define PRINTER_EVENT_LEDS
+#endif
+
 /*********************************************************************\
 * R/C SERVO support
 * Sponsored by TrinityLabs, Reworked by codexmas