diff --git a/IOT/lib/OledScreen/include/OledScreen.h b/IOT/lib/OledScreen/include/OledScreen.h
index 7870b00..d2a7f6e 100644
--- a/IOT/lib/OledScreen/include/OledScreen.h
+++ b/IOT/lib/OledScreen/include/OledScreen.h
@@ -40,7 +40,13 @@ public:
      */
     void wifiWaiting();
 
-
+    /**
+     * @brief show the sensor value
+     * 
+     * @param distance length value
+     * @param poid weith value
+     * @param humitemp humidity and temperature value
+     */
     void printVal(String distance, String poid, String humitemp);
 
 private: