Add PSU G-codes

config/default/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/3DFabXYZ/Migbot/Configuration.h

@@ -336,6 +336,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/ADIMLab/Gantry v1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/ADIMLab/Gantry v2/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AlephObjects/TAZ4/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Alfawise/U20-bltouch/Configuration.h

@@ -373,6 +373,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Alfawise/U20/Configuration.h

@@ -373,6 +373,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AliExpress/CL-260/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AliExpress/UM2pExt/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/A2/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/A2plus/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/A6/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/A8/Configuration.h

@@ -336,6 +336,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/A8plus/Configuration.h

@@ -336,6 +336,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/E10/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/E16/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Anet/ET4/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AnyCubic/Chiron/Configuration.h

@@ -339,6 +339,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AnyCubic/Mega Zero/Anycubic V1/Configuration.h

@@ -336,6 +336,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AnyCubic/Mega Zero/BigTreeTech SKR Mini MZ V1.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AnyCubic/i3 Mega/Configuration.h

@@ -340,6 +340,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/AnyCubic/i3/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/ArmEd/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Artillery/Genius/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Artillery/Sidewinder X1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Artillery/Sidewinder X1_0.9_degree_BMG_E3D_V6/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Azteeg/X5GT/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BIBO/TouchX/cyclops/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BIBO/TouchX/default/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BIQU/B1-BLTouch/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BIQU/B1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BQ/Hephestos/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BQ/Hephestos_2/Configuration.h

@@ -343,6 +343,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/BQ/WITBOX/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/CTC/i3 2560 Rev A/no probe/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Cartesio/Configuration.h

@@ -336,6 +336,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Copymaster3D/300/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Copymaster3D/400/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Copymaster3D/500/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10 Mini/CrealityV1/Configuration.h

@@ -344,6 +344,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10 Mini/MEEB-3DP/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10 S4/CrealityV1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10 S5/CrealityV1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10 V2/Configuration.h

@@ -342,6 +342,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10/CrealityV1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10S/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-10S/CrealityV1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-20 Pro/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-20/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/CR-8/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-2/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 Pro V1.5/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 Pro/BigTreeTech SKR Mini E3 1.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 Pro/BigTreeTech SKR Mini E3 1.2/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 Pro/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 Pro/CrealityV1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 Pro/CrealityV427/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3 V2/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR E3 Turbo/2-into-1 Hotend/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR E3 Turbo/Dual Z/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR E3 Turbo/Single Extruder/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR E3-DIP V1.1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR Mini E3 1.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR Mini E3 1.2/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/CrealityV1/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/CrealityV427/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/FYSETC Cheetah 1.2/BLTouch/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/FYSETC Cheetah 1.2/base/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/FYSETC Cheetah/BLTouch/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/FYSETC Cheetah/base/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/MEEB-3DP/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-3/MKS Robin E3 1.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-4/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5 Plus/Configuration.h

@@ -337,6 +337,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5 Pro/Creality/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5 Pro/CrealityV422/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5 Pro/CrealityV427/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5/BigTreeTech SKR 1.4 Turbo (TMC2209)/Configuration.h

@@ -345,6 +345,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5/BigTreeTech SKR Mini E3 2.0/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5/Creality/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Creality/Ender-5/CrealityV427/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Dagoma/Disco Ultimate/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Daycom/3DP-100/Configuration.h

@@ -337,6 +337,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/EXP3D/Imprimante multifonction/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Einstart-S/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FYSETC/AIO_II/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FYSETC/F6_13/Configuration.h

@@ -337,6 +337,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FYSETC/S6/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Felix/DUAL/Configuration.h

@@ -335,6 +335,9 @@
   #define PSU_DEFAULT_OFF           // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Felix/Single/Configuration.h

@@ -335,6 +335,9 @@
   #define PSU_DEFAULT_OFF           // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FlashForge/Creator 2X/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FlashForge/CreatorPro/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FlyingBear/P905H/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/FolgerTech/i3-2020/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Formbot/Raptor/Configuration.h

@@ -378,6 +378,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Formbot/T_Rex_2+/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Formbot/T_Rex_3/Configuration.h

@@ -338,6 +338,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power

config/examples/Geeetech/A10/Configuration.h

@@ -335,6 +335,9 @@
   //#define PSU_DEFAULT_OFF         // Keep power off until enabled directly with M80
   //#define PSU_POWERUP_DELAY 250   // (ms) Delay for the PSU to warm up to full power
 
+  //#define PSU_POWERUP_GCODE  "M355 S1"  // G-code to run after power-on (e.g., case light on)
+  //#define PSU_POWEROFF_GCODE "M355 S0"  // G-code to run before power-off (e.g., case light off)
+
   //#define AUTO_POWER_CONTROL      // Enable automatic control of the PS_ON pin
   #if ENABLED(AUTO_POWER_CONTROL)
     #define AUTO_POWER_FANS         // Turn on PSU if fans need power