From c37903c33b8859a5bac2d2441ff708ed63ff671f Mon Sep 17 00:00:00 2001
From: "Dirk O. Kaar" <19971886+dok-net@users.noreply.github.com>
Date: Thu, 28 Nov 2019 00:27:52 +0100
Subject: [PATCH] Uninitialized stack object can have unintended bad values
 (#6846)

---
 cores/esp8266/HardwareSerial.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cores/esp8266/HardwareSerial.cpp b/cores/esp8266/HardwareSerial.cpp
index 194a0553e..5f7ea141c 100644
--- a/cores/esp8266/HardwareSerial.cpp
+++ b/cores/esp8266/HardwareSerial.cpp
@@ -133,7 +133,7 @@ unsigned long HardwareSerial::testBaudrate()
 unsigned long HardwareSerial::detectBaudrate(time_t timeoutMillis)
 {
     esp8266::polledTimeout::oneShotFastMs timeOut(timeoutMillis);
-    unsigned long detectedBaudrate;
+    unsigned long detectedBaudrate = 0;
     while (!timeOut) {
         if ((detectedBaudrate = testBaudrate())) {
           break;