[2.0.x] Add endstop noise filter (#10796)

Marlin/src/config/default/Configuration.h

@@ -554,6 +554,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -573,6 +573,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -573,6 +573,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 #define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -560,6 +560,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 #define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -541,6 +541,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -554,6 +554,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 #define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -541,6 +541,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -552,6 +552,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -563,6 +563,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -572,6 +572,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -563,6 +563,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -557,6 +557,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Creality/Ender-3/Configuration.h

@@ -557,6 +557,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -563,6 +563,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -534,6 +534,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -534,6 +534,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -558,6 +558,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -568,6 +568,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Geeetech/Prusa i3 Pro B/bltouch/Configuration.h

@@ -568,6 +568,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Geeetech/Prusa i3 Pro B/noprobe/Configuration.h

@@ -568,6 +568,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Geeetech/Prusa i3 Pro C/Configuration.h

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Geeetech/Prusa i3 Pro W/Configuration.h

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -557,6 +557,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -565,6 +565,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -573,6 +573,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -562,6 +562,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -552,6 +552,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/RepRapPro/Huxley/Configuration.h

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -549,6 +549,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -566,6 +566,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -555,6 +555,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/STM32F4/Configuration.h

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -604,6 +604,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 #define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Tronxy/X5S/Configuration.h

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

Marlin/src/config/examples/Tronxy/XY100/Configuration.h

@@ -564,6 +564,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -583,6 +583,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -563,6 +563,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -553,6 +553,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -626,6 +626,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -626,6 +626,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -626,6 +626,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -631,6 +631,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -616,6 +616,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -616,6 +616,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -602,6 +602,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -620,6 +620,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -566,6 +566,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 #define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -556,6 +556,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -555,6 +555,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -542,6 +542,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================

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

@@ -558,6 +558,23 @@
 // This will remove the need to poll the interrupt pins, saving many CPU cycles.
 //#define ENDSTOP_INTERRUPTS_FEATURE
 
+/**
+ * Endstop Noise Filter
+ *
+ * Enable this option if endstops falsely trigger due to noise.
+ * NOTE: Enabling this feature means adds an error of +/-0.2mm, so homing
+ * will end up at a slightly different position on each G28. This will also
+ * reduce accuracy of some bed probes.
+ * For mechanical switches, the better approach to reduce noise is to install
+ * a 100 nanofarads ceramic capacitor in parallel with the switch, making it
+ * essentially noise-proof without sacrificing accuracy.
+ * This option also increases MCU load when endstops or the probe are enabled.
+ * So this is not recommended. USE AT YOUR OWN RISK.
+ * (This feature is not required for common micro-switches mounted on PCBs
+ * based on the Makerbot design, since they already include the 100nF capacitor.)
+ */
+//#define ENDSTOP_NOISE_FILTER
+
 //=============================================================================
 //============================== Movement Settings ============================
 //=============================================================================