diff --git a/mock-api/restServer.ts b/mock-api/restServer.ts
index cb3627521..5f0d7d09a 100644
--- a/mock-api/restServer.ts
+++ b/mock-api/restServer.ts
@@ -276,10 +276,10 @@ function updateMask(entity: any, de: any, dd: any) {
       const old_custom_name = dd.nodes[dd_objIndex].cn;
       console.log(
         'comparing names, old (' +
-          old_custom_name +
-          ') with new (' +
-          new_custom_name +
-          ')'
+        old_custom_name +
+        ') with new (' +
+        new_custom_name +
+        ')'
       );
       if (old_custom_name !== new_custom_name) {
         changed = true;
@@ -375,15 +375,15 @@ function check_upgrade(version: string) {
 
     console.log(
       'Upgrade this version (' +
-        THIS_VERSION +
-        ') to dev (' +
-        dev_version +
-        ') is ' +
-        (DEV_VERSION_IS_UPGRADEABLE ? 'YES' : 'NO') +
-        ' and to stable (' +
-        stable_version +
-        ') is ' +
-        (STABLE_VERSION_IS_UPGRADEABLE ? 'YES' : 'NO')
+      THIS_VERSION +
+      ') to dev (' +
+      dev_version +
+      ') is ' +
+      (DEV_VERSION_IS_UPGRADEABLE ? 'YES' : 'NO') +
+      ' and to stable (' +
+      stable_version +
+      ') is ' +
+      (STABLE_VERSION_IS_UPGRADEABLE ? 'YES' : 'NO')
     );
     data = {
       emsesp_version: THIS_VERSION,
@@ -965,14 +965,17 @@ const emsesp_sensordata = {
     { id: '28-233D-9497-0C03', n: 'Dallas 1', t: 25.7, o: 1.2, u: 1 },
     { id: '28-243D-7437-1E3A', n: 'Dallas 2 outside', t: 26.1, o: 0, u: 1 },
     { id: '28-243E-7437-1E3B', n: 'Zolder', t: 27.1, o: 0, u: 1 },
-    { id: '28-183D-1892-0C33', n: 'Roof', o: 2, u: 1 } // no temperature
+    { id: '28-183D-1892-0C33', n: 'Roof', o: 2, u: 1 }, // no temperature
+    { id: '28_1767_7B13_2502', n: 'gateway_temperature', t: 28.1, o: 0, u: 1 } // internal system temp
   ],
   // as: [],
   as: [
-    { id: 1, g: 36, n: 'motor', v: 0, u: 0, o: 17, f: 0, t: 0, d: false },
-    { id: 2, g: 37, n: 'External switch', v: 13, u: 0, o: 17, f: 0, t: 1, d: false },
-    { id: 3, g: 39, n: 'Pulse count', v: 144, u: 0, o: 0, f: 0, t: 2, d: false },
-    { id: 4, g: 40, n: 'Pressure', v: 16, u: 17, o: 0, f: 0, t: 3, d: false }
+    { id: 1, g: 35, n: 'motor', v: 0, u: 0, o: 17, f: 0, t: 0, d: false, s: false },
+    { id: 2, g: 37, n: 'External switch', v: 13, u: 0, o: 17, f: 0, t: 1, d: false, s: false },
+    { id: 3, g: 39, n: 'Pulse count', v: 144, u: 0, o: 0, f: 0, t: 2, d: false, s: false },
+    { id: 4, g: 40, n: 'Pressure', v: 16, u: 17, o: 0, f: 0, t: 3, d: false, s: false },
+    { id: 6, g: 39, n: 'core_voltage', v: 3.34, u: 23, o: 0, f: 0, t: 3, d: false, s: true },
+    { id: 7, g: 36, n: 'supply_voltage', v: 12.21, u: 23, o: 0, f: 0, t: 3, d: false, s: true }
   ],
   analog_enabled: true
 };
@@ -4811,6 +4814,7 @@ router
         u: as.uom,
         t: as.type,
         d: as.deleted,
+        s: as.is_system,
         v: 0 // must be added for demo only
       });
     } else {