Added placeholder pins

templates/main.html

@@ -14,7 +14,7 @@
            <h3 class="device_list_title">Device Listing and Status</h3>
 
             {% for pin in pins %}
-                {% if pin.name is not None %}
+                {% if pin.name is defined %}
                     <p>
                         {{ pins[pin].name }} :
                     {% if pins[pin].state == true %}