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123 lines
4.7 KiB
HTML
123 lines
4.7 KiB
HTML
<!DOCTYPE html>
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<html lang="en" dir="ltr">
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Units, Measurement & Locale</title>
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<link rel="stylesheet" href="../styles/docs.css">
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<body data-page="units-and-locale" data-locale="en">
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<pre class="markdown-content"># Units, Measurement & Locale
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The Meshtastic app automatically displays temperatures, distances, speeds, and times in the units your device is configured to use — no settings to change inside the app.
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## Temperature
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Temperature values from environment sensors are transmitted as **°C** and displayed based on your device's temperature unit preference.
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Your Setting | You See |
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Celsius | 22°C |
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Fahrenheit | 72°F |
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This affects all temperature displays throughout the app: node environment telemetry, soil temperature, dew point, and telemetry chart axes.
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Temperature follows your locale's **temperature preference**, independent of the distance system. Locales that mix systems work correctly — a UK phone shows miles for distance but **°C** for temperature. On Android 14+, the **Temperature** regional preference (Settings → System → Languages → Regional preferences) overrides the locale default.
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## Distance & Altitude
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Distances between nodes and GPS altitudes are transmitted as **meters** and automatically scaled and converted.
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Your Setting | Small Distance | Large Distance | Altitude |
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Metric | 350 m | 2.5 km | 1,200 m |
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Imperial (US) | 1,148 ft | 1.6 mi | 3,937 ft |
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The app uses natural scaling — short distances stay in meters or feet, while longer distances switch to kilometres or miles automatically.
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### Where these appear
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- **Node list** — distance and bearing to each node
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- **Node detail** — altitude, distance from your position
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- **Map** — waypoint distances, traceroute hop distances
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- **Compass** — distance to selected node
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## Speed
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GPS ground speed is displayed in your locale's preferred speed unit.
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Your Setting | You See |
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Metric | 12 km/h |
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Imperial (US) | 7 mph |
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## Wind
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Wind speed and gust data from environment sensors are transmitted as **m/s** and converted for display.
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Your Setting | You See |
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Metric | 5 m/s |
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Imperial (US) | 11 mph |
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Wind readings appear in the **Node Detail** environment section and the **Environment Telemetry** charts.
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## Rainfall
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Rainfall measurements (1-hour and 24-hour totals) are transmitted as **mm** and converted for display.
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Your Setting | You See |
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Metric | 12 mm |
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Imperial (US) | 0.5 in |
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## Units That Never Change
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Some units are international standards and are displayed the same way regardless of your locale:
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Measurement | Unit | Why |
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Barometric pressure | hPa | International meteorological standard |
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Heading / bearing | ° (degrees) | Universal navigation convention |
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Radiation | μR/hr | Standard dosimetry unit |
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GPS coordinates | decimal degrees | Universal geographic standard |
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Humidity, battery, soil moisture | % | Universal |
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## Date & Time
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All timestamps throughout the app — last heard, message times, telemetry logs, chart axes — follow your device's date and time preferences.
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Setting | What It Controls | Example |
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**24-Hour Time** | Clock format | 14:30 vs 2:30 PM |
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**Date Format** | Date ordering | 09/05/2026 vs 05/09/2026 |
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The app also uses **relative time** where it makes sense — for example, "5 min ago" or "2 hours ago" in the node list — which is automatically localised into your device language.
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## Changing Your Measurement System (Android)
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On Android, your measurement system (metric vs imperial) is tied to your region setting:
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1. Open **Android Settings → System → Language & Region**
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2. Change your **Region** or **Measurement units** preference
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3. On Android 14+, temperature can be overridden on its own under **Regional preferences → Temperature**
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4. Return to Meshtastic — values update immediately
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> 💡 **Tip:** All measurement formatting is handled centrally and respects your platform's locale, so units stay consistent everywhere in the app.
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## Related Topics
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- [Node Metrics](node-metrics) — where temperature, distance, and sensor values are displayed
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- [Telemetry & Sensors](telemetry-and-sensors) — the sensors that produce these measurements
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- [Measurement & Formatting](../developer/measurement) — developer reference for the formatting utilities
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- [Settings — Radio & User](settings-radio-user) — region setting that drives unit selection
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---
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</pre>
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</body>
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</html> |