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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8"/>
+    <title>fiatlux v0.2</title>
+    <link rel="stylesheet" href="css/picnic.min.css">
+    <link rel="stylesheet" href="css/style.css">
+</head>
+<body>
+<nav>
+    <a href="#" class="brand">
+        <span>fiatlux v0.2</span>
+        <span class="label warning" id="status_box">Loading...</span>
+    </a>
+</nav>
+<main data-page="dashboard" id="page">
+    <section id="dashboard">
+        <h2>Status</h2>
+        <div class="flex">
+            <div>
+                <article class="card">
+                    <header>
+                        <h3>System</h3>
+                    </header>
+                    <div class="table">
+                        <div class="row">
+                            <span>Chip ID</span>
+                            <span><span class="postfill_chipid">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Hostname</span>
+                            <span><span class="postfill_hostname">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Firmware Version</span>
+                            <span>N/A</span>
+                        </div>
+                        <div class="row">
+                            <span>Flash ID</span>
+                            <span><span class="postfill_flashid">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Flash size</span>
+                            <span><span class="postfill_flashsize">N/A</span> KiB</span>
+                        </div>
+                        <div class="row">
+                            <span>Free heap</span>
+                            <span><span class="postfill_heap">N/A</span> bytes</span>
+                        </div>
+                        <div class="row">
+                            <span>Uptime</span>
+                            <span><span class="postfill_uptime">N/A</span> s</span>
+                        </div>
+                    </div>
+                </article>
+            </div>
+            <div>
+                <article class="card">
+                    <header>
+                        <h3>Network <span class="label success postfill_clientip">current connection</span></h3>
+                    </header>
+                    <div class="table">
+                        <div class="row">
+                            <span>Mode</span>
+                            <span><span class="postfill_opmode">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Station SSID</span>
+                            <span><span class="postfill_stassid">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Station IP</span>
+                            <span><span class="postfill_staip">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Station MAC</span>
+                            <span><span class="postfill_stamac">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>AP SSID</span>
+                            <span><span class="postfill_apssid">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>AP IP</span>
+                            <span><span class="postfill_apip">N/A</span></span>
+                        </div>
+                        <div class="row">
+                            <span>AP MAC</span>
+                            <span><span class="postfill_apmac">N/A</span></span>
+                        </div>
+                    </div>
+                </article>
+            </div>
+            <div>
+                <article class="card">
+                    <header>
+                        <h3>Power</h3>
+                    </header>
+                    <div class="table">
+                        <div class="row">
+                            <span>Input</span>
+                            <span><span class="label success">5V</span><span class="label success">12V</span></span>
+                        </div>
+                        <div class="row">
+                            <span>Output</span>
+                            <span><span class="label warning"><span id="out_voltage">11.2</span>V</span></span>
+                        </div>
+                    </div>
+                    <canvas id="chartCanvas" style="height:100px"></canvas>
+                </article>
+            </div>
+        </div>
+    </section>
+</main>
+<div id="unused_values" style="display:none;"></div>
+<script type="text/javascript" src="js/smoothie_min.js"></script>
+<script>
+    var menu = document.getElementById("bmenub");
+    var voltage = document.getElementById("out_voltage");
+
+    var unused_values = {};
+
+    DataView.prototype.setChar = function(pos, char) {
+        this.setInt8(pos++, char.charCodeAt(0));
+        return pos;
+    };
+
+    DataView.prototype.setString = function(pos, str) {
+        for(var i = 0; i < str.length; i++) {
+            this.setInt8(pos++, str.charCodeAt(i));
+        }
+        this.setInt8(pos++, 0);
+        return pos;
+    };
+
+    var ws;
+    var retries;
+    var series = new TimeSeries();
+
+    function setMsg(cls, text) {
+        sbox = document.getElementById('status_box');
+        sbox.className = "label " + cls;
+        sbox.innerHTML = text;
+        console.log(text);
+    }
+
+    function startPolling() {
+        var chart = new SmoothieChart({
+            millisPerPixel: 111, grid: {fillStyle: '#ffffff', strokeStyle: '#ffffff', borderVisible: false},
+            labels: {fillStyle: '#000000'}, maxValue: 1024, minValue: 0
+        });
+        chart.addTimeSeries(series, {lineWidth: 2, strokeStyle: '#03a9f4', fillStyle: '#f1f5fa'});
+        var canvas = document.getElementById("chartCanvas");
+        canvas.width = canvas.clientWidth;
+        canvas.height = canvas.clientHeight;
+        chart.streamTo(canvas, 500);
+    }
+
+    function onMessage(evt) {
+        retries = 0;
+        if (typeof evt.data == 'string') {
+            var data = JSON.parse(evt.data);
+            for (const [key, value] of Object.entries(data)) {
+                const elements = document.querySelectorAll(".postfill_" + key);
+                if (!elements.length)
+                    unused_values[key] = value;
+                else
+                    for (i = 0; i < elements.length; ++i) {
+                        elements[i].innerHTML = value;
+                    }
+            }
+            document.getElementById("unused_values").innerHTML = JSON.stringify(unused_values);
+        } else {
+            var dv = new DataView(evt.data);
+            var cmd = String.fromCharCode(dv.getUint8(0));
+            var val = dv.getUint16(1);
+
+            if (cmd === 'G')
+                console.log("LED switched", val);
+            else if (cmd === 'V') {
+                voltage.innerHTML = (val * 13 / 1024).toFixed(2);
+                series.append(new Date().getTime(), val);
+            } else
+                console.log('unknown command', cmd, val);
+        }
+    }
+
+    function wsOpen() {
+        var uri = "/stream"
+        if (ws === undefined || ws.readyState !== 0) {
+            if (retries)
+                setMsg("warning", "WebSocket timeout, retrying..");
+            else
+                setMsg("primary", "Opening WebSocket..");
+            ws = new WebSocket("ws://" + location.host + uri);
+            ws.binaryType = 'arraybuffer';
+            ws.onopen = function (evt) {
+                retries = 0;
+                setMsg("success", "WebSocket is open.");
+            };
+            ws.onerror = function (evt) {
+                console.error(evt);
+                setMsg("error", "WebSocket error!"); /*window.location.reload(true);*/
+            };
+            ws.onmessage = function (evt) {
+                onMessage(evt);
+            };
+            retries = 0;
+        }
+    }
+
+    function buf2hex(buffer) { // buffer is an ArrayBuffer
+        return [...new Uint8Array(buffer)].map(x => x.toString(16).padStart(2, '0')).join('');
+    }
+
+    function wsWrite(data) {
+        console.info(buf2hex(data));
+        if (ws.readyState === 3 || retries++ > 5)
+            wsOpen();
+        else if (ws.readyState === 1)
+            ws.send(data);
+    }
+
+    function gpio() {
+        if (document.getElementById('led-switch').checked)
+            wsWrite('E');
+        else
+            wsWrite('D');
+    }
+
+    window.onload = function () {
+        wsOpen();
+        startPolling();
+    }
+
+</script>
+</body>
+</html>