From 9ff665b788ec55dd5a28ac628cab90b8980d2424 Mon Sep 17 00:00:00 2001
From: Frank <91616163+softhack007@users.noreply.github.com>
Date: Wed, 29 May 2024 15:51:44 +0200
Subject: [PATCH] another unprotected Serial real

---
 wled00/improv.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/wled00/improv.cpp b/wled00/improv.cpp
index 646201d3..eef8ad82 100644
--- a/wled00/improv.cpp
+++ b/wled00/improv.cpp
@@ -50,6 +50,7 @@ void handleImprovPacket() {
   uint8_t rpcCommandType = 0;
   char rpcData[128];
   rpcData[0] = 0;
+  if (!Serial) return; // WLEDMM avoid reading from unconnected USB-CDC
 
   while (!timeout) {
     if (Serial.available() < 1) {