diff --git a/index.php b/index.php
index 826b389..ca184c0 100644
--- a/index.php
+++ b/index.php
@@ -151,6 +151,7 @@ body.hacker li:hover {
     <li><a href="familieberichten.html">Familieberichten</a></li>
     <li><a href="http://spacedesk.de-roo.org">Desktop uitbreiding</a></li>
     <li><a href="rekenmachine/index.html" target="_blank">rekenmachine</a></li>
+    <li><a href="https://ben.de-roo.org/radar/index.php" target="_blank">esp32</a></li>
 </ul>
 
 <script>