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-rw-r--r--cores/arduino/Stream.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/cores/arduino/Stream.cpp b/cores/arduino/Stream.cpp
index bf8304f..d267bf0 100644
--- a/cores/arduino/Stream.cpp
+++ b/cores/arduino/Stream.cpp
@@ -214,7 +214,7 @@ int Stream::readBytesUntil( char terminator, char *buffer, size_t length)
{
int index = 0;
*buffer = 0;
- while(index < length ){
+ while(index < length-1 ){
int c = timedRead();
if( c <= 0 ){
return 0; // timeout returns 0 !