From 7459cbd2e2dfd8fc064e0b13f21b9930c9fd5786 Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Mon, 22 Dec 2025 01:38:49 +0100
Subject: [PATCH] setRealtimePixel robustness improvement

avoid drawing negative pixel addresses (could happen when  arlsOffset is < 0)
---
 wled00/udp.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/wled00/udp.cpp b/wled00/udp.cpp
index 2e39ca51..f5d1e788 100644
--- a/wled00/udp.cpp
+++ b/wled00/udp.cpp
@@ -692,7 +692,7 @@ void handleNotifications()
 void setRealtimePixel(uint16_t i, byte r, byte g, byte b, byte w)
 {
   int pix = i + arlsOffset;
-  if (pix < theStripLength) { // WLEDMM use cached length
+  if (unsigned(pix) < theStripLength) { // WLEDMM use cached length
     if (!arlsDisableGammaCorrection && gammaCorrectCol) {
       r = gamma8(r);
       g = gamma8(g);
@@ -701,7 +701,7 @@ void setRealtimePixel(uint16_t i, byte r, byte g, byte b, byte w)
     }
     if (useMainSegmentOnly) {
       //Segment &seg = strip.getMainSegment();
-      if ((theMainSeg) && (pix < theMainSegLength)) theMainSeg->setPixelColor(pix, r, g, b, w); // WLEDMM used cached main segment
+      if ((theMainSeg) && (unsigned(pix) < theMainSegLength)) theMainSeg->setPixelColor(pix, r, g, b, w); // WLEDMM used cached main segment
     } else {
       strip.setPixelColor(pix, r, g, b, w);
     }