Implement Bodenfeuchte app: MQTT listener, SQLite storage, chart UI, Docker
- Custom Next.js server starts MQTT listener on boot - Subscribes to zigbee2mqtt/Bodenfeuchte_1, stores soil_moisture in SQLite - API route /api/data returns last 6 hours of measurements - Frontend shows current value + Recharts line chart, auto-refresh every 60s - Dockerfile + docker-compose with persistent volume for SQLite DB Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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@@ -1,65 +1,106 @@
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import Image from "next/image";
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'use client';
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import { useEffect, useState } from 'react';
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import {
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LineChart,
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Line,
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XAxis,
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YAxis,
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CartesianGrid,
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Tooltip,
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ResponsiveContainer,
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} from 'recharts';
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type Measurement = {
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timestamp: number;
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soil_moisture: number;
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};
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function formatTime(ts: number): string {
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return new Date(ts).toLocaleTimeString('de-DE', {
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hour: '2-digit',
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minute: '2-digit',
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});
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}
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export default function Home() {
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const [data, setData] = useState<Measurement[]>([]);
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const [lastUpdate, setLastUpdate] = useState<string>('');
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const fetchData = async () => {
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const res = await fetch('/api/data');
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const json: Measurement[] = await res.json();
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setData(json);
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setLastUpdate(new Date().toLocaleTimeString('de-DE'));
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};
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useEffect(() => {
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fetchData();
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const interval = setInterval(fetchData, 60_000);
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return () => clearInterval(interval);
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}, []);
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const latest = data.at(-1);
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return (
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<div className="flex flex-col flex-1 items-center justify-center bg-zinc-50 font-sans dark:bg-black">
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<main className="flex flex-1 w-full max-w-3xl flex-col items-center justify-between py-32 px-16 bg-white dark:bg-black sm:items-start">
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<Image
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className="dark:invert"
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src="/next.svg"
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alt="Next.js logo"
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width={100}
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height={20}
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priority
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/>
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<div className="flex flex-col items-center gap-6 text-center sm:items-start sm:text-left">
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<h1 className="max-w-xs text-3xl font-semibold leading-10 tracking-tight text-black dark:text-zinc-50">
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To get started, edit the page.tsx file.
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</h1>
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<p className="max-w-md text-lg leading-8 text-zinc-600 dark:text-zinc-400">
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Looking for a starting point or more instructions? Head over to{" "}
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<a
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href="https://vercel.com/templates?framework=next.js&utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
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className="font-medium text-zinc-950 dark:text-zinc-50"
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>
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Templates
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</a>{" "}
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or the{" "}
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<a
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href="https://nextjs.org/learn?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
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className="font-medium text-zinc-950 dark:text-zinc-50"
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>
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Learning
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</a>{" "}
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center.
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<main className="min-h-screen bg-gray-950 text-gray-100 p-8">
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<h1 className="text-2xl font-semibold mb-1">Bodenfeuchte</h1>
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<p className="text-sm text-gray-400 mb-6">
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Letzte 6 Stunden · Aktualisierung: {lastUpdate || '…'}
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</p>
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{latest && (
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<div className="mb-8 inline-block bg-gray-800 rounded-xl px-6 py-4">
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<span className="text-5xl font-bold text-green-400">
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{latest.soil_moisture.toFixed(1)}
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</span>
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<span className="text-2xl text-gray-400 ml-2">%</span>
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<p className="text-xs text-gray-500 mt-1">
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{formatTime(latest.timestamp)} Uhr
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</p>
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</div>
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<div className="flex flex-col gap-4 text-base font-medium sm:flex-row">
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<a
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className="flex h-12 w-full items-center justify-center gap-2 rounded-full bg-foreground px-5 text-background transition-colors hover:bg-[#383838] dark:hover:bg-[#ccc] md:w-[158px]"
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href="https://vercel.com/new?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
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target="_blank"
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rel="noopener noreferrer"
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>
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<Image
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className="dark:invert"
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src="/vercel.svg"
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alt="Vercel logomark"
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width={16}
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height={16}
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/>
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Deploy Now
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</a>
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<a
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className="flex h-12 w-full items-center justify-center rounded-full border border-solid border-black/[.08] px-5 transition-colors hover:border-transparent hover:bg-black/[.04] dark:border-white/[.145] dark:hover:bg-[#1a1a1a] md:w-[158px]"
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href="https://nextjs.org/docs?utm_source=create-next-app&utm_medium=appdir-template-tw&utm_campaign=create-next-app"
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target="_blank"
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rel="noopener noreferrer"
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>
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Documentation
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</a>
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</div>
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</main>
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</div>
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)}
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<div className="bg-gray-900 rounded-2xl p-4" style={{ height: 360 }}>
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{data.length === 0 ? (
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<div className="flex items-center justify-center h-full text-gray-500">
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Noch keine Daten vorhanden
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</div>
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) : (
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<ResponsiveContainer width="100%" height="100%">
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<LineChart data={data} margin={{ top: 8, right: 16, bottom: 8, left: 0 }}>
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<CartesianGrid strokeDasharray="3 3" stroke="#374151" />
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<XAxis
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dataKey="timestamp"
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tickFormatter={formatTime}
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stroke="#6b7280"
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tick={{ fontSize: 12 }}
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minTickGap={40}
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/>
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<YAxis
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domain={[0, 100]}
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unit="%"
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stroke="#6b7280"
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tick={{ fontSize: 12 }}
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width={45}
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/>
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<Tooltip
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formatter={(v) => [`${Number(v).toFixed(1)} %`, 'Bodenfeuchte']}
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labelFormatter={(ts) => formatTime(Number(ts))}
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contentStyle={{ background: '#1f2937', border: 'none', borderRadius: 8 }}
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/>
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<Line
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type="monotone"
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dataKey="soil_moisture"
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stroke="#4ade80"
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strokeWidth={2}
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dot={false}
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activeDot={{ r: 4 }}
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/>
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</LineChart>
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</ResponsiveContainer>
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)}
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</div>
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</main>
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);
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}
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