diff --git a/src/esp32_platform.cpp b/src/esp32_platform.cpp
index eee0a24..fc8cc1d 100644
--- a/src/esp32_platform.cpp
+++ b/src/esp32_platform.cpp
@@ -6,7 +6,7 @@
 
 #include "knx/bits.h"
 
-Esp32Platform::Esp32Platform() : ArduinoPlatform(Serial)
+Esp32Platform::Esp32Platform() : ArduinoPlatform(Serial1)
 {
 }