diff --git a/.drone.yml b/.drone.yml
index 2b5bc8c..6dc3021 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -2,6 +2,11 @@ kind: pipeline
 name: default
 
 steps:
+  - name: version
+    image: alpine
+    commands:
+      - echo "module.exports = '$(date)';" > version.js
+
   - name: docker build
     image: plugins/docker
     settings:
diff --git a/index.js b/index.js
index 4c5b620..780144c 100644
--- a/index.js
+++ b/index.js
@@ -5,6 +5,7 @@
  * Created by Timo Hocker <timo@scode.ovh>, August 2020
  */
 
+/* eslint-disable no-console */
 // @ts-nocheck
 'use strict';
 
@@ -15,9 +16,12 @@ const api = require ('./lib/api');
 const http_proxy = require ('express-http-proxy');
 const history_fallback = require ('connect-history-api-fallback');
 const { argv } = require ('yargs');
+const version = require ('./version');
 
 const is_dev = argv.dev;
 
+console.log (`starting appreports build ${version}`);
+
 (async () => {
   await db.init (is_dev);
 
@@ -32,7 +36,6 @@ const is_dev = argv.dev;
     app.use (express.static ('dist'));
 
   app.listen (3000, () => {
-    // eslint-disable-next-line no-console
     console.log ('listening on 3000');
   });
 }) ();
diff --git a/lib/api/dump.js b/lib/api/dump.js
index ae854a5..621ecdc 100644
--- a/lib/api/dump.js
+++ b/lib/api/dump.js
@@ -1,3 +1,10 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of appreports which is released under GPL-3.0-or-later.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, August 2020
+ */
+
 /* eslint-disable no-console */
 'use strict';
 
diff --git a/package.json b/package.json
index 43f1cdd..1b3db04 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,6 @@
     "express-http-proxy": "^1.6.2",
     "faker": "^4.1.0",
     "knex": "^0.21.2",
-    "simplex-noise": "^2.4.0",
     "sqlite3": "^5.0.0",
     "vue": "^2.6.11",
     "vue-chartjs": "^3.5.0",
@@ -47,4 +46,4 @@
     "name": "Timo Hocker",
     "email": "timo@scode.ovh"
   }
-}
+}
\ No newline at end of file
diff --git a/seeds/fake.js b/seeds/fake.js
index c83c6fd..702a374 100644
--- a/seeds/fake.js
+++ b/seeds/fake.js
@@ -8,7 +8,6 @@
 'use strict';
 
 const faker = require ('faker');
-const sn = require ('simplex-noise');
 
 const apps = [];
 
@@ -20,17 +19,23 @@ async function create_app (knex) {
   apps.push (id);
 }
 
-function create_log (index, simplex) {
+let last_t = 0;
+let last_h = 0;
+
+function create_log (timestamp) {
+  last_t += faker.random.number (3) - 1;
+  last_h += faker.random.number (2) - 1;
+
   const data = {
-    light:       faker.random.number (),
-    temperature: simplex.noise2D (index * 0.1, 0),
-    humidity:    simplex.noise2D (index * 0.1, 1000)
+    light:       faker.random.number (10),
+    temperature: last_t,
+    humidity:    last_h
   };
   return {
     app_id:       faker.random.arrayElement (apps),
     message:   faker.random.words (),
     data:      JSON.stringify (data),
-    timestamp: faker.date.recent ()
+    timestamp
   };
 }
 
@@ -41,10 +46,11 @@ async function seed (knex) {
     // eslint-disable-next-line no-await-in-loop
     await create_app (knex);
 
-  const simplex = (new sn);
-  const log = (Array (20))
+  const log = (Array (1000))
     .fill (() => null)
-    .map ((a, index) => create_log (index, simplex));
+    .map (() => faker.date.recent (30))
+    .sort ()
+    .map ((t) => create_log (t));
 
   await knex.batchInsert ('log', log, 10);
 }
diff --git a/src/App.vue b/src/App.vue
index 17e0184..9b5909a 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,11 +1,21 @@
 <template>
   <div id="app">
+    <p
+      id="build-info"
+      v-text="version"
+    />
     <router-view />
   </div>
 </template>
 
 <script>
-export default {};
+import version from '../version';
+
+export default {
+  data () {
+    return { version: `build: ${version}` };
+  }
+};
 </script>
 
 <style>
@@ -17,16 +27,8 @@ export default {};
   color: #2c3e50;
 }
 
-#nav {
-  padding: 30px;
-}
-
-#nav a {
-  font-weight: bold;
-  color: #2c3e50;
-}
-
-#nav a.router-link-exact-active {
-  color: #42b983;
+#build-info {
+  font-size: 10pt;
+  text-align: left;
 }
 </style>
diff --git a/src/components/ChartView.vue b/src/components/ChartView.vue
index ca7df20..a90b0ee 100644
--- a/src/components/ChartView.vue
+++ b/src/components/ChartView.vue
@@ -38,9 +38,19 @@ export default {
     },
     chart_options () {
       return {
-        scales: {
-          yAxes: this.yaxis.map (
-            (y, index) => ({ id: index })
+        animation:                   { duration: 0 },
+        responsiveAnimationDuration: 0,
+        scales:                      {
+          yAxes:                       this.yaxis.map (
+            (y, index) => {
+              const range = {};
+              if (typeof y.min_value === 'number')
+                range.suggestedMin = y.min_value;
+              if (typeof y.max_value === 'number')
+                range.suggestedMax = y.max_value;
+
+              return { id: index, ticks: range };
+            }
           )
         }
       };
diff --git a/src/components/ConfigEditor.vue b/src/components/ConfigEditor.vue
index 98eaf70..3b4b0ac 100644
--- a/src/components/ConfigEditor.vue
+++ b/src/components/ConfigEditor.vue
@@ -116,7 +116,11 @@ export default {
     }
   },
   data () {
-    return { temp: this.value };
+    let val = this.value;
+    if (typeof val === 'undefined')
+      val = this.create_default (this.template);
+
+    return { temp: val };
   },
   computed: {
     config: {
@@ -124,8 +128,14 @@ export default {
         return this.temp;
       },
       set (val) {
-        this.$emit ('input', val);
-        this.temp = val;
+        let mapped = val;
+        if (this.template.type === 'number') {
+          mapped = parseFloat (val);
+          if (isNaN (mapped))
+            mapped = 0;
+        }
+        this.$emit ('input', mapped);
+        this.temp = mapped;
       }
     }
   },
diff --git a/src/default.js b/src/default.js
index ac248f7..35f6a3f 100644
--- a/src/default.js
+++ b/src/default.js
@@ -25,16 +25,20 @@ export default {
       x:      'timestamp',
       y:      [
         {
-          label: 'temperature',
-          field: 'data/temperature',
-          color: '#ff0000',
-          fill:  '#0000'
+          label:     'temperature',
+          field:     'data/temperature',
+          color:     '#ff0000',
+          fill:      '#0000',
+          min_value: 10,
+          max_value: 40
         },
         {
-          label: 'humidity',
-          field: 'data/humidity',
-          color: '#0000ff',
-          fill:  '#0000'
+          label:     'humidity',
+          field:     'data/humidity',
+          color:     '#0000ff',
+          fill:      '#0000',
+          min_value: 100,
+          max_value: 0
         },
         {
           label: 'light',
diff --git a/src/template.js b/src/template.js
index 2c87444..4410838 100644
--- a/src/template.js
+++ b/src/template.js
@@ -68,7 +68,9 @@ export default {
                 { type: 'string', name: 'label' },
                 { type: 'string', name: 'field' },
                 { type: 'string', name: 'color' },
-                { type: 'string', name: 'fill' }
+                { type: 'string', name: 'fill' },
+                { type: 'number', name: 'min_value' },
+                { type: 'number', name: 'max_value' }
               ]
             }
           }
diff --git a/version.js b/version.js
new file mode 100644
index 0000000..e3d7874
--- /dev/null
+++ b/version.js
@@ -0,0 +1,10 @@
+/*
+ * Copyright (C) Sapphirecode - All Rights Reserved
+ * This file is part of appreports which is released under GPL-3.0-or-later.
+ * See file 'LICENSE' for full license details.
+ * Created by Timo Hocker <timo@scode.ovh>, August 2020
+ */
+
+'use strict';
+
+module.exports = 'development';
diff --git a/yarn.lock b/yarn.lock
index 8c21dd9..f422882 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7940,11 +7940,6 @@ simple-swizzle@^0.2.2:
   dependencies:
     is-arrayish "^0.3.1"
 
-simplex-noise@^2.4.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/simplex-noise/-/simplex-noise-2.4.0.tgz#81b3458fb22dccc3bc8dd9a977c73797f86f523a"
-  integrity sha512-OjyDWm/QZjVbMrPxDVi9b2as+SeNn9EBXlrWVRlFW+TSyWMSXouDryXkQN0vf5YP+QZKobrmkvx1eQYPLtuqfw==
-
 slash@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/slash/-/slash-1.0.0.tgz#c41f2f6c39fc16d1cd17ad4b5d896114ae470d55"