diff --git a/blink.h b/blink.h
new file mode 100644
index 0000000..b1f40dc
--- /dev/null
+++ b/blink.h
@@ -0,0 +1,4 @@
+// D0 est defini via la librairie esp8266
+#define PIN_LED D0
+
+#define SERIAL_SPEED 115200
diff --git a/blink.ino b/blink.ino
index c734448..b327476 100644
--- a/blink.ino
+++ b/blink.ino
@@ -1,8 +1,7 @@
-// D0 est defini via la librairie esp8266
-#define PIN_LED D0
+#include "blink.h"
 
 void setup() {
-  Serial.begin(115200);
+  Serial.begin(SERIAL_SPEED);
   Serial.println("\nresetting");
   
   pinMode(PIN_LED, OUTPUT);