diff --git a/arduino/mqttfastledmenu/mqttfastledmenu.cpp b/arduino/mqttfastledmenu/mqttfastledmenu.cpp
index e61e667..6077df5 100644
--- a/arduino/mqttfastledmenu/mqttfastledmenu.cpp
+++ b/arduino/mqttfastledmenu/mqttfastledmenu.cpp
@@ -181,7 +181,7 @@ void mqttSendColorState()
   int blue = color & 0xFF;
   char buff[12];
 
-  sprintf(buff, "%i,%i,%i\0", red, green, blue);
+  sprintf(buff, "%i,%i,%i", red, green, blue);
   client.publish(MQTT_LED_COLOR_STATE, buff, true);
 }
 
@@ -201,7 +201,7 @@ void ledBlackAll()
 */
 void ledCylon()
 {
-  for(int i = 0; i < LED_NUM; i++) {
+  for (int i = 0; i < LED_NUM; i++) {
     client.loop();
 
     if (ledEffect != LED_EFFECT_CYLON) {
@@ -235,7 +235,7 @@ void ledCylon()
 
     FastLED.delay(1000 / speed);
   }
-
+  Serial.print("\nNettoyage");
   // Il faut nettoyer certaines cases avant la prochaine loop
   if ((LED_NUM - 2) >= 0) {
     leds[LED_NUM - 2] = color;
@@ -245,44 +245,63 @@ void ledCylon()
     leds[LED_NUM - 1] = CRGB::Black;
   }
   FastLED.show();
+  Serial.print(" ok\nRewind");
 
   // led[0] et led[255] sont gérées par la loop précédante
-  for(int i = LED_NUM - 1; i >= 0; i--) {
+  for (int i = LED_NUM - 1; i >= 0; i--) {
+    Serial.print("\nLoop ");
+    Serial.println(i);
     client.loop();
-
+    Serial.print(" ok\nTestActif");
     if (ledEffect != LED_EFFECT_CYLON) {
       return;
     }
-
+    Serial.println(" ok");
     if ((i - 1) >= 0) {
+      Serial.print("-1");
       leds[i - 1] = color;
       leds[i - 1].fadeLightBy(249);
+      Serial.print(" ok\n");
     }
 
+    Serial.print("0");
     leds[i] = color;
+    Serial.println(" ok");
 
     if ((i + 1) <= LED_NUM) {
+      Serial.print("+1");
       leds[i + 1] = color;
       leds[i + 1].fadeLightBy(200);
+      Serial.print(" ok\n");
     }
+    
     if ((i + 2) <= LED_NUM) {
+      Serial.print("+2");
       leds[i + 2] = color;
       leds[i + 2].fadeLightBy(220);
+      Serial.print(" ok\n");
     }
+    
     if ((i + 3) <= LED_NUM) {
+      Serial.print("+3");
       leds[i + 3] = CRGB::Black;
+      Serial.print(" ok\n");
     }
-
+    Serial.print("Delay");
     FastLED.delay(1000 / speed);
+    Serial.println(" ok");
   }
+  Serial.print("Clean1");
   // Il faut nettoyer certaines cases avant la prochaine loop
   if (1 <= LED_NUM) {
     leds[1] = color;
     leds[1].fadeLightBy(220);
   }
+  Serial.print(" ok\nClean2");
   if (2 <= LED_NUM) {
     leds[2] = CRGB::Black;
   }
+  Serial.print(" ok\n");
   FastLED.show();
 }