From 1292ff76b34c15cf6bc78259985440e13b5cb1f8 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Fri, 7 May 2021 22:37:31 -0500
Subject: [PATCH] Debounce for Power-Loss pin

---
 Marlin/src/feature/powerloss.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/Marlin/src/feature/powerloss.h b/Marlin/src/feature/powerloss.h
index 03e467432c..df3ae222a2 100644
--- a/Marlin/src/feature/powerloss.h
+++ b/Marlin/src/feature/powerloss.h
@@ -186,8 +186,14 @@ class PrintJobRecovery {
 
     #if PIN_EXISTS(POWER_LOSS)
       static inline void outage() {
-        if (enabled && READ(POWER_LOSS_PIN) == POWER_LOSS_STATE)
-          _outage();
+        static constexpr uint8_t OUTAGE_THRESHOLD = 3;
+        static uint8_t outage_counter = 0;
+        if (enabled && READ(POWER_LOSS_PIN) == POWER_LOSS_STATE) {
+          outage_counter++;
+          if (outage_counter >= OUTAGE_THRESHOLD) _outage();
+        }
+        else
+          outage_counter = 0;
       }
     #endif