# C realtime chart 2

> Room temperature — two sensors, fixed axis

A shadcn/ui block from the [@cnippet](https://ui.cnippet.dev/?utm_source=shadcn.exchange) registry, listed on [shadcn.exchange](https://shadcn.exchange/r/cnippet/c-realtime-chart-2).

- Page, with a live preview: https://shadcn.exchange/r/cnippet/c-realtime-chart-2
- Screenshot: https://shadcn.exchange/shot/cnippet/c-realtime-chart-2/light.png
- Registry item: https://ui.cnippet.dev/r/c-realtime-chart-2.json
- Categories: realtime chart
- Listed: 2026-10-27, source last changed 2026-10-27

## Install

```bash
npx shadcn@latest add https://shadcn.exchange/r/cnippet/c-realtime-chart-2.json
```

Run it in a project that has shadcn/ui set up. It adds the files below and installs what they depend on.

## Dependencies

- Registry items: `@cnippet/realtime-chart`, `@cnippet/chart-card`

## Files

### `registry/default/chart-variants/c-realtime-chart-2.tsx`

```tsx
"use client";

import { ChartCard } from "@/registry/default/charts/chart-card";
import { RealtimeChart } from "@/registry/default/charts/realtime-chart";

// Two rooms drifting slowly with sensor noise; fixed axis so small moves stay small.
function readSensors() {
  const t = Date.now() / 20000;
  const noise = () => (Math.random() - 0.5) * 0.3;
  return {
    lab: Math.round((22.4 + 0.8 * Math.sin(t) + noise()) * 10) / 10,
    office: Math.round((21.1 + 0.5 * Math.cos(t / 2) + noise()) * 10) / 10,
  };
}

export default function LiveTemperature() {
  return (
    <ChartCard className="max-w-2xl" title="Room temperature">
      <RealtimeChart
        categories={["office", "lab"]}
        className="h-48"
        interval={1500}
        onTick={readSensors}
        valueFormatter={(value) => `${value.toFixed(1)} °C`}
        windowSize={30}
        yAxisWidth={56}
        yDomain={[19, 25]}
      />
    </ChartCard>
  );
}
```