From b51e80f5ddf5eb0ec9141607bbcd360a3fdf3c4a Mon Sep 17 00:00:00 2001
From: Will Tatam <will@netmindz.net>
Date: Sat, 8 Nov 2025 16:28:19 +0000
Subject: [PATCH] Safety check: ensure multiWiFi is never empty to prevent
 crashes during serialization

---
 wled00/wled.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/wled00/wled.cpp b/wled00/wled.cpp
index bbf11f990..e51101995 100644
--- a/wled00/wled.cpp
+++ b/wled00/wled.cpp
@@ -658,11 +658,17 @@ void WLED::initConnection()
   WiFi.setPhyMode(force802_3g ? WIFI_PHY_MODE_11G : WIFI_PHY_MODE_11N);
 #endif
 
-  if (multiWiFi[selectedWiFi].staticIP != 0U && multiWiFi[selectedWiFi].staticGW != 0U) {
+if (multiWiFi.empty()) {                       // guard: handle empty WiFi list safely
+  WiFi.config(IPAddress((uint32_t)0), IPAddress((uint32_t)0), IPAddress((uint32_t)0));
+ } else {
+  if (selectedWiFi >= multiWiFi.size()) selectedWiFi = 0; // guard: ensure valid index
+  if (multiWiFi[selectedWiFi].staticIP != IPAddress((uint32_t)0) &&
+    multiWiFi[selectedWiFi].staticGW != IPAddress((uint32_t)0)) { // guard: compare as IPAddress to avoid pointer overload
     WiFi.config(multiWiFi[selectedWiFi].staticIP, multiWiFi[selectedWiFi].staticGW, multiWiFi[selectedWiFi].staticSN, dnsAddress);
   } else {
     WiFi.config(IPAddress((uint32_t)0), IPAddress((uint32_t)0), IPAddress((uint32_t)0));
   }
+ }
 
   lastReconnectAttempt = millis();