Plot live cadence data

app.py

@@ -53,7 +53,14 @@ def home():
 def overview():
     cadences = db.get_all_cadences()
     last_cadence = cadences[-1]['rpm']
-    return render_template('overview.html', last_cadence=last_cadence, cadences=cadences)
+
+    plot = {
+        "x": [c['logged_at'] for c in cadences],
+        "y": [c['rpm'] for c in cadences],
+        "type": 'scatter'
+    }
+
+    return render_template('overview.html', last_cadence=last_cadence, plot=plot, cadences=cadences)
 
 
 if __name__ == '__main__':

templates/overview.html

@@ -1,7 +1,18 @@
 <h1
-    class="mb-4 text-4xl font-extrabold leading-none tracking-tight text-gray-900 md:text-5xl lg:text-6xl dark:text-white">
+    class="mb-4 text-4xl font-extrabold leading-none tracking-tight text-gray-900 md:text-5xl lg:text-6xl dark:text-white text-center">
     {{last_cadence}} rpm</h1>
 
+<div id="overview-plot" class="w-full mt-2 aspect-video"></div>
+<script>
+    Plotly.newPlot(document.getElementById("overview-plot"), [
+        {{ plot | tojson}}
+    ], {
+        margin: { t: 0 }, xaxis: { showgrid: false, showticklabels: false }, yaxis: {
+            showgrid: false
+        }
+    });
+</script>
+
 <div class="relative overflow-x-auto">
     <table class="w-full text-sm text-left text-gray-500 dark:text-gray-400">
         <thead class="text-xs text-gray-700 uppercase bg-gray-50 dark:bg-gray-700 dark:text-gray-400">