From 4f968861d680d36f176c26a92288c994582ab292 Mon Sep 17 00:00:00 2001
From: Damian Schneider <daedae@gmx.ch>
Date: Sun, 16 Nov 2025 12:59:35 +0100
Subject: [PATCH] fix for low heap situations on ESP8266

---
 wled00/util.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/wled00/util.cpp b/wled00/util.cpp
index 09769c96..e9811cf2 100644
--- a/wled00/util.cpp
+++ b/wled00/util.cpp
@@ -647,7 +647,8 @@ int32_t hw_random(int32_t lowerlimit, int32_t upperlimit) {
 #ifdef ESP8266
 static void *validateFreeHeap(void *buffer) {
   // make sure there is enough free heap left if buffer was allocated in DRAM region, free it if not
-  if (getContiguousFreeHeap() < MIN_HEAP_SIZE) {
+  // note: ESP826 needs very little contiguous heap for webserver, checking total free heap works better
+  if (getFreeHeapSize() < MIN_HEAP_SIZE) {
     free(buffer);
     return nullptr;
   }