diff --git a/css/dashboard.css b/css/dashboard.css
index 3ba90fa..eb8a386 100644
--- a/css/dashboard.css
+++ b/css/dashboard.css
@@ -120,3 +120,11 @@ body {
   }
 }
 
+/*
+ * 
+ */
+
+.opacity-animated {
+  -webkit-transition: opacity 1s; /* For Safari 3.1 to 6.0 */
+  transition: opacity 1s;
+}
\ No newline at end of file
diff --git a/dashboard.html b/dashboard.html
index 035dc88..558d5f4 100644
--- a/dashboard.html
+++ b/dashboard.html
@@ -44,7 +44,7 @@
         <div class="sidebar-sticky">
           <ul class="nav flex-column">
             <li class="nav-item">
-              <a class="nav-link" id="navbarPage-1Link" onclick="setPage(-1)" href="#">
+              <a class="nav-link" id="navbarPage-1Link" onclick="dashboard.updateParams({page: -1})" href="#">
                 <span data-feather="home"></span>
                 Dashboard <span class="sr-only">(current)</span>
               </a>
@@ -108,32 +108,50 @@
         <div
           class="d-flex justify-content-between flex-wrap flex-md-nowrap align-items-center pt-3 pb-2 mb-3 border-bottom">
           <h1 class="h2" id="titleH1">Dashboard</h1>
-          <div class="btn-toolbar mb-2 mb-md-0">
+          <div class="btn-toolbar mb-2 mb-md-0" role="toolbar">
             <div class="btn-group mr-2">
               <button type="button" class="btn btn-sm btn-outline-secondary">Share</button>
               <button type="button" class="btn btn-sm btn-outline-secondary">Export</button>
             </div>
-            <div class="dropdown" class="h-100">
-              <button id="dropdownMenuButton" type="button" class="btn btn-sm btn-outline-secondary dropdown-toggle"
-                data-toggle="dropdown">
-                <span data-feather="calendar"></span>
 
-
-              </button>
-              <div class="dropdown-menu dropdown-menu-right" aria-labelledby="dropdownMenuButton">
-                <form class="px-4 py-3">
+            <div class="btn-group mr-2" role="group">
+              <div class="dropdown" class="h-100">
+                <button id="dropdownMenuButton" type="button" class="btn btn-sm btn-outline-secondary dropdown-toggle"
+                  data-toggle="dropdown">
+                  <span data-feather="calendar"></span>
+                </button>
+                <div class="dropdown-menu dropdown-menu-right" aria-labelledby="dropdownMenuButton">
+                  <form class="px-4 py-3">
                     <div class="btn-group">
-                        <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(86400)">Today</button>
-                        <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(604800)">This Week</button>
-                        <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(18144000)">This Month</button>
-                      </div>
-                </form>
+                      <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(86400)">Today</button>
+                      <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(604800)">This
+                        Week</button>
+                      <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(18144000)">This
+                        Month</button>
+                      <button type="button" class="btn btn-light" onclick="dashboard.setTimeRange(18144000)">This
+                        Year</button>
+                    </div>
+                  </form>
+                </div>
               </div>
             </div>
+
+            <div class="btn-group mr-2" role="group">
+              <button type="button" class="btn btn-sm btn-outline-secondary" onclick="dashboard.loadDashboard()">
+                <span data-feather="refresh-cw"></span>
+              </button>
+            </div>
+
           </div>
         </div>
 
-        <div id="mainContent" style="height: 100%">
+          <div id="loader" class="d-flex justify-content-center opacity-animated" style="position: absolute; left: 50%;">
+            <div class="spinner-border" role="status">
+              <span class="sr-only">Loading...</span>
+            </div>
+          </div>
+
+        <div id="mainContent" class="opacity-animated" style="height: 100%">
         </div>
     </div>
     </main>
diff --git a/js/dashboard.js b/js/dashboard.js
index 1fef56a..8521344 100644
--- a/js/dashboard.js
+++ b/js/dashboard.js
@@ -7,24 +7,36 @@ class BlueWeatherDashboard {
 
   constructor() {
     // cunstruct xmlhttp
+    this.initDone = false
     this.blueweather = new BlueWeather()
-    this.loc = this.blueweather.findGetParameter("locId")
-    this.currentPage = -1
-    this.setPage(this.currentPage)
+
+    this.params = {
+      loc: 1,
+      page: -1,
+      maxVals: 100
+    }
+
+    this.restoreParms(this.params)
+
+    this.setTimeRange()
+    this.loadDashboard(this.params)
+    this.initDone = true
   }
 
-  setPage(page) {
-    document.getElementById("navbarPage" + this.currentPage + "Link").classList.remove("active")
-    document.getElementById("navbarPage" + page + "Link").classList.add("active")
+  loadDashboard() {
+    window.history.pushState("object or string", "Title", this.buildUrl({ "params": JSON.stringify(this.params) }));
 
-    this.currentPage = page
     // page: -1 for dashboard or sensor id
     var mainContent = document.getElementById('mainContent')
+    var loader = document.getElementById('loader')
 
-    // set page to loading state
-    mainContent.innerHTML = "<div class=\"d-flex justify-content-center\"><div class=\"spinner-border\" role=\"status\"><span class=\"sr-only\">Loading...</span></div></div>"
+    mainContent.style = "opacity: 0;"
+    loader.style = "position: absolute; left: 50%; opacity: 1;"
+    //mainContent.classList.remove("opacity-animated");
 
-    this.blueweather.getLocationData(this.loc, undefined, undefined, true, function (locationData) {
+    var page = this.params.page
+
+    this.blueweather.getLocationData(this.params.loc, { from: this.params.range.from, to: this.params.range.to }, this.params.maxVals, true, function (locationData) {
       // refresh sensors list
       dashboard.loadSensors(locationData.sensors)
 
@@ -33,21 +45,141 @@ class BlueWeatherDashboard {
 
       if (page === -1) {
         dashboard.setPageTitle("Dashboard")
-        mainContent.innerHTML = "<p>This is your great dashboard :))</p>"
+
+        var firstRow = document.createElement("div")
+        firstRow.classList.add("card-deck")
+
+        for (var i = 0; i < locationData.sensors.length; i++) {
+          var sensor = locationData.sensors[i]
+
+          // get the valuetype of the current sensor
+          var valueType;
+
+          for (var s = 0; s < locationData.valuetypes.length; s++) {
+            var thisValType = locationData.valuetypes[s]
+            if (parseInt(thisValType.id) === parseInt(sensor.valuetypeid)) {
+              valueType = thisValType;
+              break;
+            }
+          }
+
+          // get all relevant  meassurement values
+          var vals = []
+
+          for (s = 0; s < locationData["measvalues"].length; s++) {
+            var thisValue = locationData["measvalues"][s]
+            if (parseInt(thisValue['sensorid']) === parseInt(sensor.id)) {
+              vals.push(thisValue)
+            }
+          }
+
+          if(vals.length < 1) {
+            continue
+          }
+
+          vals.sort(function(a,b){
+            return b.timestamp - a.timestamp
+          })
+
+          var latestVal = vals[0]
+
+          // - create html widget -
+          // create card
+          var thisWidget = document.createElement("div")
+          thisWidget.classList.add("card")
+
+          // create header
+          var thisHeader = document.createElement("div")
+          thisHeader.classList.add("card-header")
+          thisHeader.innerHTML = sensor.sensorname + " (" + valueType.valuetype + ")"
+          thisWidget.appendChild(thisHeader)
+
+          // create body
+          var thisBody = document.createElement("div")
+          thisBody.classList.add("card-body")
+          thisWidget.appendChild(thisBody)
+
+          // create footer
+          var thisFooter = document.createElement("div")
+          thisFooter.classList.add("card-footer")
+          // fill footer
+          var thisUpdateTime = document.createElement("small")
+          thisUpdateTime.classList.add("text-muted")
+          var lastUpdated = new Date(latestVal.timestamp * 1000)
+          thisUpdateTime.innerHTML = "last updated " + (lastUpdated.getDate() === new Date().getDate() ? "today" : lastUpdated.getFullYear+"-"+lastUpdated.getMonth()+"-"+lastUpdated.getDate()) + " at " + lastUpdated.getHours() + ":" + lastUpdated.getMinutes()
+          thisFooter.appendChild(thisUpdateTime)
+          thisWidget.appendChild(thisFooter)
+
+          // - create widget body -
+          var displayProperties = JSON.parse(valueType.displayproperty).widget
+
+          switch (displayProperties.type) {
+            case "doughnut":
+                // the widget is gauge-like
+                var thisChart = document.createElement("canvas")
+                thisChart.id = "chartOf" + sensor.sensorname
+
+                var chartData = {
+                  datasets: [
+                    {
+                      label: sensor.sensorname + " (" + valueType.valuetype + ")",
+                      data: [
+                        parseInt(latestVal.measvalue),
+                        100 -parseInt( latestVal.measvalue)
+                      ]
+                    }
+                  ],
+                  labels: false
+                }
+
+                Object.assign(chartData.datasets[0], displayProperties.properties)
+      
+                dashboard.createPercentCircle(thisChart, chartData)
+
+                thisBody.appendChild(thisChart)
+
+              break
+              case "text":
+                // the widget is pure text
+                thisWidget.classList.add("text-center")
+                thisBody.innerHTML = '<h5 class="card-title">' + latestVal.measvalue + valueType.valueunit + '</h5>'
+              break
+          }
+
+          firstRow.appendChild(thisWidget)
+        }
+
+        mainContent.innerHTML = "";
+        mainContent.appendChild(firstRow)
       }
       else if (page !== -1) {
         dashboard.loadDiagram("mainContent", locationData, page)
       }
-    })
 
+      loader.style = "position: absolute; left: 50%; opacity: 0;"
+      mainContent.classList.add("opacity-animated");
+      mainContent.style = "opacity: 1;"
+
+    })
+  }
+
+  restoreParms(defaults = {}) {
+    this.params = Object.assign(defaults, JSON.parse(this.findGetParameter("params")))
+  }
+
+  updateParams(newParams) {
+    if (newParams.page !== this.params.page && this.initDone) {
+      document.getElementById("navbarPage" + this.params.page + "Link").classList.remove("active")
+    }
+
+    Object.assign(this.params, newParams)
+
+    this.loadDashboard()
   }
 
   setTimeRange(from = "", to = "") {
     this.blueweather.log("changing time range; form: " + from + "; to: " + to + "; (now is: " + new Date().getTime() + ")", 3)
 
-    // set page to loading state
-    mainContent.innerHTML = "<div class=\"d-flex justify-content-center\"><div class=\"spinner-border\" role=\"status\"><span class=\"sr-only\">Loading...</span></div></div>"
-
     if (from !== "") {
       from = new Date().getTime() / 1000 - from
     }
@@ -56,9 +188,7 @@ class BlueWeatherDashboard {
       to = new Date().getTime() / 1000 - parseInt(to)
     }
 
-    this.blueweather.getLocationData(this.loc, { from: from, to: to }, undefined, true, function (locationData) {
-      dashboard.loadDiagram("mainContent", locationData, dashboard.currentPage)
-    })
+    this.updateParams({ range: { to: to, from: from } })
 
   }
 
@@ -70,7 +200,7 @@ class BlueWeatherDashboard {
     for (var i = 0; i < sensors.length; i++) {
       var currentHTML = sensorsList.innerHTML
       sensorsList.innerHTML = currentHTML +
-        "<li class=\"nav-item\"><a class=\"nav-link\" id=\"navbarPage" + sensors[i]["id"] + "Link\" href=\"#\" onclick=\"dashboard.setPage(" + sensors[i]["id"] + ")\"><span data-feather=\"file\"></span>" + sensors[i]["sensorname"] + "</a></li>"
+        "<li class=\"nav-item\"><a class=\"nav-link\" id=\"navbarPage" + sensors[i]["id"] + "Link\" href=\"#\" onclick=\"dashboard.updateParams({page: " + sensors[i]["id"] + "})\"><span data-feather=\"file\"></span>" + sensors[i]["sensorname"] + "</a></li>"
     }
 
     feather.replace()
@@ -124,14 +254,14 @@ class BlueWeatherDashboard {
       range: locationData.range
     }
 
-    
+
 
     for (i = 0; i < vals.length; i++) {
       chartData.data.push({ x: vals[i]["timestamp"], y: vals[i]["measvalue"] })
     }
 
     Object.assign(chartData.datasets[0], JSON.parse(valueType.displayproperty))
-    Object.assign(chartData.datasets[0], {data: chartData.data, pointRadius: chartData.data.length > 500 ? 0 : 3})
+    Object.assign(chartData.datasets[0], { data: chartData.data, pointRadius: chartData.data.length > 500 ? 0 : 3 })
 
     mainContent.innerHTML = "<canvas class=\"my-4 w-100\" id=\"myChart\"></canvas>"
     this.setPageTitle(sensor.sensorname + " (" + valueType.valuetype + ")")
@@ -141,6 +271,39 @@ class BlueWeatherDashboard {
     this.createDiagram("myChart", chartData)
   }
 
+  // --------------------
+  // - helper functions -
+  // --------------------
+
+  createPercentCircle(canvasElement, data) {
+    var randomScalingFactor = function () {
+      return Math.round(Math.random() * 100);
+    };
+    var ctx = canvasElement//document.getElementById(canvasId)
+
+    var chartData = data
+    var chartOptions = {
+      responsive: true,
+      circumference: Math.PI,
+      rotation: Math.PI,
+      legend: {
+        position: 'top',
+      },
+      animation: {
+        animateScale: true,
+        animateRotate: true
+      }
+    }
+
+
+    var myChart = new Chart(ctx, {
+      type: 'doughnut',
+      data: chartData,
+      options: chartOptions
+    })
+
+  }
+
   createDiagram(canvasId, data) {
     // Graphs
     var ctx = document.getElementById(canvasId)
@@ -233,6 +396,48 @@ class BlueWeatherDashboard {
   setPageTitle(title) {
     document.getElementById("titleH1").innerHTML = title
   }
-} 
+
+  findGetParameter(parameterName) {
+    var result = null,
+      tmp = [];
+    location.search
+      .substr(1)
+      .split("&")
+      .forEach(function (item) {
+        tmp = item.split("=");
+        if (tmp[0] === parameterName) result = decodeURIComponent(tmp[1]);
+      });
+    return result;
+  }
+
+  buildUrl(params) {
+    var basepath = window.location.href.split("?")[0]
+
+    basepath += "?"
+
+    for (var param in params) {
+      basepath += param + "=" + params[param] + "&"
+    }
+
+    return basepath
+  }
+
+  whichTransitionEvent() {
+    var t;
+    var el = document.createElement('fakeelement');
+    var transitions = {
+      'transition': 'transitionend',
+      'OTransition': 'oTransitionEnd',
+      'MozTransition': 'transitionend',
+      'WebkitTransition': 'webkitTransitionEnd'
+    }
+
+    for (t in transitions) {
+      if (el.style[t] !== undefined) {
+        return transitions[t];
+      }
+    }
+  }
+}
 
 dashboard = new BlueWeatherDashboard()
\ No newline at end of file
diff --git a/testdashboard.html b/testdashboard.html
index 1697155..fc5764e 100644
--- a/testdashboard.html
+++ b/testdashboard.html
@@ -4,7 +4,6 @@
 <head>
 	<title>humidity Chart</title>
 	<script src="js/Chart.min.js"></script>
-	<script src="js/utils.js"></script>
 	<style>
 	canvas {
 		-moz-user-select: none;
@@ -33,8 +32,8 @@
 						randomScalingFactor(),
 					],
 					backgroundColor: [
-						window.chartColors.blue,
-						window.chartColors.white,
+						'rgb(54, 162, 235)',
+						'lightgrey',
 					],
 					label: 'Dataset 1'
 				}],
@@ -45,6 +44,8 @@
 			},
 			options: {
 				responsive: true,
+				circumference: Math.PI,
+				rotation: Math.PI,
 				legend: {
 					position: 'top',
 				},