diff -r b4bfed3684d0 -r e75ce5bbda73 www/js/mon_node.js
--- a/www/js/mon_node.js	Fri Jan 03 15:21:22 2020 +0100
+++ b/www/js/mon_node.js	Sun Jan 05 11:42:02 2020 +0100
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Copyright (C) 2019
+ * Copyright (C) 2019-2020
  *
  * Michiel Broek <mbroek at mbse dot eu>
  *
@@ -47,7 +47,8 @@
    { name: 'gps_altitude', type: 'float' },
    { name: 'net_address', type: 'string' },
    { name: 'net_ifname', type: 'string' },
-   { name: 'net_rssi', type: 'int' }
+   { name: 'net_rssi', type: 'int' },
+   { name: 'up_interval', type: 'int' }
   ],
   id: 'record',
   url: url
@@ -70,7 +71,9 @@
    html += '<tr><td>OS</td><td>' + record.os + ' versie: ' + record.os_version + '</td></tr>';
    html += '<tr><td>Firmware</td><td>' + record.firmware + '</td></tr>';
    if (record.online) {
-    html += '<tr><td>Temperatuur</td><td>' + record.temperature.toFixed(1) + '&deg;C</td></tr>';
+    if (record.temperature > 0) {
+     html += '<tr><td>Temperatuur</td><td>' + record.temperature.toFixed(1) + '&deg;C</td></tr>';
+    }
     if (record.humidity > 0) {
      html += '<tr><td>Vochtigheid</td><td>' + record.humidity.toFixed(1) + '%</td></tr>';
     }
@@ -81,6 +84,10 @@
      html += '<tr><td>GPS</td><td>' + record.gps_latitude + ' ' + record.gps_longitude + ' ' + record.gps_altitude + '</td></tr>';
     }
     html += '<tr><td>Netwerk</td><td>' + record.net_ifname + ' ' + record.net_address + '</td></tr>';
+    if (record.net_rssi < 0) {
+     html += '<tr><td>WiFi signaal</td><td>' + record.net_rssi + '</td></tr>';
+    }
+    html += '<tr><td>Update interval</td><td>' + record.up_interval + ' sec.</td></tr>';
    }
    html += '</<table>';
    html += '</div>';