Check alarm/state change field

src/main.cpp

@@ -84,6 +84,7 @@ void callback(char* topic, byte* payload, unsigned int length) {
     }    
     else if (strcmp(topic, "alarm/state") == 0)
     {
+        if (doc["changed"] == true) {
             if (strcmp(doc["status"], "Armed") == 0)
             {
                 if (bool reed = digitalRead(REED_ACTIVATION_PIN) == 1)
@@ -100,6 +101,7 @@ void callback(char* topic, byte* payload, unsigned int length) {
                 }   
             }
         }
+    }
     
 
 }