[2.0.x] Enable / disable PSU automatically (#9503)

Marlin/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/Marlin.cpp

@@ -236,9 +236,9 @@ void setup_powerhold() {
   #endif
   #if HAS_POWER_SWITCH
     #if ENABLED(PS_DEFAULT_OFF)
-      OUT_WRITE(PS_ON_PIN, PS_ON_ASLEEP);
+      PSU_OFF();
     #else
-      OUT_WRITE(PS_ON_PIN, PS_ON_AWAKE);
+      PSU_ON();
     #endif
   #endif
 }

Marlin/src/Marlin.h

@@ -42,6 +42,15 @@ void idle(
 
 void manage_inactivity(bool ignore_stepper_queue = false);
 
+// Auto Power Control
+#if ENABLED(AUTO_POWER_CONTROL)
+  #define PSU_ON()  powerManager.power_on()
+  #define PSU_OFF() powerManager.power_off()
+#else
+  #define PSU_ON()  OUT_WRITE(PS_ON_PIN, PS_ON_AWAKE)
+  #define PSU_OFF() OUT_WRITE(PS_ON_PIN, PS_ON_ASLEEP)
+#endif
+
 #if HAS_X2_ENABLE
   #define  enable_X() do{ X_ENABLE_WRITE( X_ENABLE_ON); X2_ENABLE_WRITE( X_ENABLE_ON); }while(0)
   #define disable_X() do{ X_ENABLE_WRITE(!X_ENABLE_ON); X2_ENABLE_WRITE(!X_ENABLE_ON); axis_known_position[X_AXIS] = false; }while(0)

Marlin/src/config/default/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/AlephObjects/TAZ4/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

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

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Anet/A6/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Anet/A8/Configuration.h

@@ -246,6 +246,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Azteeg/X5GT/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/BIBO/TouchX/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/BQ/Hephestos/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/BQ/Hephestos_2/Configuration.h

@@ -244,6 +244,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/BQ/WITBOX/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Cartesio/Configuration.h

@@ -246,6 +246,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Creality/CR-10/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Creality/CR-10S/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Creality/Ender/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Felix/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   #define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Felix/DUAL/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   #define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

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

@@ -246,6 +246,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Geeetech/GT2560/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Geeetech/I3_Pro_X-GT2560/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Infitary/i3-M508/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/JGAurora/A5/Configuration.h

@@ -250,6 +250,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/MakerParts/Configuration.h

@@ -256,6 +256,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Malyan/M150/Configuration.h

@@ -250,6 +250,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Malyan/M200/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Micromake/C1/basic/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Micromake/C1/enhanced/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Mks/Sbase/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
 #define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/RepRapWorld/Megatronics/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/RigidBot/Configuration.h

@@ -248,6 +248,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/SCARA/Configuration.h

@@ -275,6 +275,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/STM32F10/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Sanguinololu/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/TheBorg/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/TinyBoy2/Configuration.h

@@ -267,6 +267,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Tronxy/X1/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/UltiMachine/Archim2/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Velleman/K8200/Configuration.h

@@ -265,6 +265,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Velleman/K8400/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Velleman/K8400/Dual-head/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/Wanhao/Duplicator 6/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/adafruit/ST7565/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/FLSUN/auto_calibrate/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/FLSUN/kossel/Configuration.h

@@ -236,6 +236,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/FLSUN/kossel_mini/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/generic/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/kossel_mini/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/kossel_pro/Configuration.h

@@ -249,6 +249,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/delta/kossel_xl/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   #define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/gCreate/gMax1.5+/Configuration.h

@@ -250,6 +250,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/makibox/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/stm32f103ret6/Configuration.h

@@ -217,6 +217,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/tvrrug/Round2/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/config/examples/wt150/Configuration.h

@@ -245,6 +245,15 @@
   // Enable this option to leave the PSU off at startup.
   // Power to steppers and heaters will need to be turned on with M80.
   //#define PS_DEFAULT_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
+    #define AUTO_POWER_E_FANS
+    #define AUTO_POWER_CONTROLLERFAN
+    #define POWER_TIMEOUT 30
+  #endif
+
 #endif
 
 // @section temperature

Marlin/src/feature/power.cpp

@@ -0,0 +1,96 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * power.cpp - power control
+ */
+
+#include "../inc/MarlinConfig.h"
+
+#if ENABLED(AUTO_POWER_CONTROL)
+
+#include "power.h"
+#include "temperature.h"
+#include "stepper_indirection.h"
+
+Power powerManager;
+
+millis_t Power::lastPowerOn;
+
+bool Power::is_power_needed() {
+  #if ENABLED(AUTO_POWER_FANS)
+    for (uint8_t i = 0; i < FAN_COUNT; i++) if (fanSpeeds[i] > 0) return true;
+  #endif
+
+  #if ENABLED(AUTO_POWER_E_FANS)
+    HOTEND_LOOP() if (thermalManager.autofan_speed[e] > 0) return true;
+  #endif
+
+  #if ENABLED(AUTO_POWER_CONTROLLERFAN) && HAS_CONTROLLERFAN
+    if (controllerFanSpeed > 0) return true;
+  #endif
+
+  if (X_ENABLE_READ == X_ENABLE_ON || Y_ENABLE_READ == Y_ENABLE_ON || Z_ENABLE_READ == Z_ENABLE_ON ||
+      thermalManager.soft_pwm_bed > 0
+      || E0_ENABLE_READ == E_ENABLE_ON // If any of the drivers are enabled...
+      #if E_STEPPERS > 1
+        || E1_ENABLE_READ == E_ENABLE_ON
+        #if HAS_X2_ENABLE
+          || X2_ENABLE_READ == X_ENABLE_ON
+        #endif
+        #if E_STEPPERS > 2
+            || E2_ENABLE_READ == E_ENABLE_ON
+          #if E_STEPPERS > 3
+              || E3_ENABLE_READ == E_ENABLE_ON
+          #endif
+        #endif
+      #endif
+  ) return true;
+
+  HOTEND_LOOP() if (thermalManager.degTargetHotend(e) > 0) return true;
+  if (thermalManager.degTargetBed() > 0) return true;
+
+  return false;
+}
+
+void Power::check() {
+  static millis_t nextPowerCheck = 0;
+  millis_t ms = millis();
+  if (ELAPSED(ms, nextPowerCheck)) {
+    nextPowerCheck = ms + 2500UL;
+    if (is_power_needed())
+      power_on();
+    else if (!lastPowerOn || ELAPSED(ms, lastPowerOn + (POWER_TIMEOUT) * 1000UL))
+      power_off();
+  }
+}
+
+void Power::power_on() {
+  lastPowerOn = millis();
+  OUT_WRITE(PS_ON_PIN, PS_ON_AWAKE);
+}
+
+void Power::power_off() {
+  OUT_WRITE(PS_ON_PIN, PS_ON_ASLEEP);
+}
+
+#endif // AUTO_POWER_CONTROL

Marlin/src/feature/power.h

@@ -0,0 +1,42 @@
+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/**
+ * power.h - power control
+ */
+
+#ifndef POWER_H
+#define POWER_H
+
+class Power {
+  public:
+    static void check();
+    static void power_on();
+    static void power_off();
+  private:
+    static millis_t lastPowerOn;
+    static bool is_power_needed();
+};
+
+extern Power powerManager;
+
+#endif // POWER_H

Marlin/src/gcode/control/M80_M81.cpp

@@ -36,6 +36,10 @@
 
 #if HAS_POWER_SWITCH
 
+  #if ENABLED(AUTO_POWER_CONTROL)
+    #include "../../feature/power.h"
+  #endif
+
   // Could be moved to a feature, but this is all the data
   bool powersupply_on =
     #if ENABLED(PS_DEFAULT_OFF)
@@ -61,7 +65,7 @@
       return;
     }
 
-    OUT_WRITE(PS_ON_PIN, PS_ON_AWAKE); // GND
+    PSU_ON();
 
     /**
      * If you have a switch on suicide pin, this is useful
@@ -114,7 +118,7 @@ void GcodeSuite::M81() {
     stepper.synchronize();
     suicide();
   #elif HAS_POWER_SWITCH
-    OUT_WRITE(PS_ON_PIN, PS_ON_ASLEEP);
+    PSU_OFF();
     powersupply_on = false;
   #endif
 

Marlin/src/module/temperature.cpp

@@ -63,10 +63,15 @@ Temperature thermalManager;
 
 float Temperature::current_temperature[HOTENDS] = { 0.0 },
       Temperature::current_temperature_bed = 0.0;
+
 int16_t Temperature::current_temperature_raw[HOTENDS] = { 0 },
         Temperature::target_temperature[HOTENDS] = { 0 },
         Temperature::current_temperature_bed_raw = 0;
 
+#if ENABLED(AUTO_POWER_E_FANS)
+  int16_t Temperature::autofan_speed[HOTENDS] = { 0 };
+#endif
+
 #if HAS_HEATER_BED
   int16_t Temperature::target_temperature_bed = 0;
 #endif
@@ -529,6 +534,9 @@ int Temperature::getHeaterPower(int heater) {
       const uint8_t bit = pgm_read_byte(&fanBit[f]);
       if (pin >= 0 && !TEST(fanDone, bit)) {
         uint8_t newFanSpeed = TEST(fanState, bit) ? EXTRUDER_AUTO_FAN_SPEED : 0;
+        #if ENABLED(AUTO_POWER_E_FANS)
+          autofan_speed[f] = newFanSpeed;
+        #endif
         // this idiom allows both digital and PWM fan outputs (see M42 handling).
         digitalWrite(pin, newFanSpeed);
         analogWrite(pin, newFanSpeed);

Marlin/src/module/temperature.h

@@ -28,11 +28,16 @@
 #define TEMPERATURE_H
 
 #include "thermistor/thermistors.h"
+#include "../inc/MarlinConfig.h"
 
 #if ENABLED(BABYSTEPPING)
   extern bool axis_known_position[XYZ];
 #endif
 
+#if ENABLED(AUTO_POWER_CONTROL)
+  #include "power.h"
+#endif
+
 #if ENABLED(PID_EXTRUSION_SCALING)
   #include "stepper.h"
 #endif
@@ -113,6 +118,10 @@ class Temperature {
                    target_temperature[HOTENDS],
                    current_temperature_bed_raw;
 
+    #if ENABLED(AUTO_POWER_E_FANS)
+      static int16_t autofan_speed[HOTENDS];
+    #endif
+
     #if HAS_HEATER_BED
       static int16_t target_temperature_bed;
     #endif
@@ -393,6 +402,9 @@ class Temperature {
         else if (target_temperature[HOTEND_INDEX] == 0)
           start_preheat_time(HOTEND_INDEX);
       #endif
+      #if ENABLED(AUTO_POWER_CONTROL)
+        powerManager.power_on();
+      #endif
       target_temperature[HOTEND_INDEX] = celsius;
       #if WATCH_HOTENDS
         start_watching_heater(HOTEND_INDEX);
@@ -401,6 +413,9 @@ class Temperature {
 
     static void setTargetBed(const int16_t celsius) {
       #if HAS_HEATER_BED
+        #if ENABLED(AUTO_POWER_CONTROL)
+          powerManager.power_on();
+        #endif
         target_temperature_bed =
           #ifdef BED_MAXTEMP
             min(celsius, BED_MAXTEMP)