From 2628e9167da2de283a87105c73a9827785293b0d Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Sun, 25 Jan 2026 16:15:24 +0100
Subject: [PATCH] fix max number of bytes to be sent

---
 wled00/src/dependencies/dmx/SparkFunDMX.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/wled00/src/dependencies/dmx/SparkFunDMX.cpp b/wled00/src/dependencies/dmx/SparkFunDMX.cpp
index d862f2b8..1241dba6 100644
--- a/wled00/src/dependencies/dmx/SparkFunDMX.cpp
+++ b/wled00/src/dependencies/dmx/SparkFunDMX.cpp
@@ -153,7 +153,7 @@ void SparkFunDMX::update() {
     
     //Send DMX data
     DMXSerial.begin(DMXSPEED, DMXFORMAT, rxPin, txPin);//Begin the Serial port
-    DMXSerial.write(dmxData, min(dmxMaxChannel, chanSize));
+    DMXSerial.write(dmxData, min(dmxMaxChannel+1, chanSize)); // send max 513 bytes = start byte + 512 channels
     DMXSerial.flush();
     DMXSerial.end();//clear our DMX array, end the Hardware Serial port
   }