diff --git a/include/classes/IoTSensor.h b/include/classes/IoTSensor.h
index caf08d9c..9fa541b0 100644
--- a/include/classes/IoTSensor.h
+++ b/include/classes/IoTSensor.h
@@ -9,10 +9,10 @@ class IoTSensor {
 
     void loop();
     virtual void doByInterval();
-    void init(String key, String id, unsigned long interval);
+    void init(String subtype, String id, unsigned long interval);
     void regEvent(String value, String consoleInfo);
 
-    String getKey();
+    String getSubtype();
     String getID();
 
     unsigned long currentMillis;
@@ -20,7 +20,7 @@ class IoTSensor {
     unsigned long difference;
 
    protected:
-    String _key;
+    String _subtype;
     String _id;
     unsigned long _interval;
 };
diff --git a/src/classes/IoTSensor.cpp b/src/classes/IoTSensor.cpp
index eb461b86..0e2b10f9 100644
--- a/src/classes/IoTSensor.cpp
+++ b/src/classes/IoTSensor.cpp
@@ -3,17 +3,17 @@
 #include "Classes/ScenarioClass3.h"
 #include "Classes/IoTSensor.h"
 
-void IoTSensor::init(String key, String id, unsigned long interval) {
+void IoTSensor::init(String subtype, String id, unsigned long interval) {
     _interval = interval * 1000;
-    _key = key;
+    _subtype = subtype;
     _id = id;
 }
 
 IoTSensor::IoTSensor() {}
 IoTSensor::~IoTSensor() {}
 
-String IoTSensor::getKey() {
-    return _key;
+String IoTSensor::getSubtype() {
+    return _subtype;
 }
 
 String IoTSensor::getID() {