Check alarm/state change field

src/main.cpp

@@ -84,20 +84,22 @@ void callback(char* topic, byte* payload, unsigned int length) {
     }    
     else if (strcmp(topic, "alarm/state") == 0)
     {
-        if (strcmp(doc["status"], "Armed") == 0)
-        {
-            if (bool reed = digitalRead(REED_ACTIVATION_PIN) == 1)
+        if (doc["changed"] == true) {
+            if (strcmp(doc["status"], "Armed") == 0)
             {
-                DynamicJsonDocument doc(1024);
-
-                doc["deviceId"] = deviceId;
-                doc["open"] = reed;
-
-                char buffer[1024];
-                size_t n = serializeJson(doc, buffer);
-                
-                client.publish("door/status", buffer, n);
-            }   
+                if (bool reed = digitalRead(REED_ACTIVATION_PIN) == 1)
+                {
+                    DynamicJsonDocument doc(1024);
+
+                    doc["deviceId"] = deviceId;
+                    doc["open"] = reed;
+
+                    char buffer[1024];
+                    size_t n = serializeJson(doc, buffer);
+                    
+                    client.publish("door/status", buffer, n);
+                }   
+            }
         }
     }