diff --git a/arduino/sketchDistanceSerial-Ultrasonic.ino b/arduino/sketchDistanceSerial-Ultrasonic.ino
index f85c55f..497ba20 100644
--- a/arduino/sketchDistanceSerial-Ultrasonic.ino
+++ b/arduino/sketchDistanceSerial-Ultrasonic.ino
@@ -4,8 +4,8 @@
 
 #include "Ultrasonic.h"
 
-#define echoPin 8 // attach pin D2 Arduino to pin Echo of HC-SR04
-#define trigPin 9 //attach pin D3 Arduino to pin Trig of HC-SR04
+#define echoPin 2 // attach pin D2 Arduino to pin Echo of HC-SR04
+#define trigPin 3 //attach pin D3 Arduino to pin Trig of HC-SR04
 
 Ultrasonic sensor(trigPin,echoPin); // Trig et Echo