diff --git a/firmware/test1/heizung-test1/src/main.cpp b/firmware/test1/heizung-test1/src/main.cpp
index 945c3a36b0483222bf391ccad304aee639d317db..9045b6b908f021b8e14421dd8f47e3ab59cb684c 100644
--- a/firmware/test1/heizung-test1/src/main.cpp
+++ b/firmware/test1/heizung-test1/src/main.cpp
@@ -573,5 +573,11 @@ void loop() {
     Serial.println(Serial1.read());
   }
 
+  if (!digitalRead(BOOT2)) {
+    analogWrite(LED_R, 128);
+  } else {
+    analogWrite(LED_R, 0);
+  }
+
   delay(1);
 }
\ No newline at end of file