A Scriptable widget for iOS that shows live river discharge readings from the Swiss Federal Office for the Environment's hydrodaten.admin.ch API — current value, a 24h trend, min/max, and a severity-tinted chart that colors itself using each station's own official flood-stage bands. Falls back to a cached reading when the network is down, and can drive any station on the network from a single script.
- iOS with the free Scriptable app installed.
- Open Scriptable and create a new script.
- Paste in the contents of
widget.js. - Give the script a name (e.g. "Hydrodata").
- Long-press your Home Screen → add a widget → choose Scriptable → pick your script and the Medium size.
The widget ships pointed at the Rhône at Geneva (station 2606). Edit CONFIG.stationId and CONFIG.riverName in the script to change the default station, or tune CONFIG.thresholds / CONFIG.referenceValue to match that station's own flow.
To run several widgets — each for a different river — off the same script: long-press a widget → Edit Widget → set Parameter to another station ID (e.g. 2019). That instance will:
- fetch and cache that station's data independently,
- auto-detect its display name and official flood-stage thresholds from the API response (no need to hand-tune
CONFIGper station), - leave your default station's widget and hand-tuned config untouched.
Find a station ID from its URL on hydrodaten.admin.ch — e.g. .../stations/2019 → parameter 2019.
Only the Medium Home Screen widget is supported for now — layout and fonts are fixed to that size, and the chart's proportions are matched to your iPhone's Medium widget dimensions (looked up from the screen size) so it fills the available space. Unrecognized screen sizes, such as iPads, fall back to standard 6.1" iPhone proportions, so the chart may not fill the widget exactly there. Small, Large, and Lock Screen/StandBy aren't handled specially; they'll still render (using the Medium layout squeezed into whatever frame iOS gives them) but aren't a supported target yet.
Tapping the widget opens the station's page on hydrodaten.admin.ch.
All settings live in CONFIG at the top of the script:
| Field | Meaning |
|---|---|
stationId |
Default hydrodaten.admin.ch station ID. |
riverName |
Display name for the default station. |
hoursWindow |
How much history the chart/stats window covers. |
trendHours |
Lookback window for the trend arrow. |
trendStablePercent |
Fraction of change below which the trend reads "stable". |
referenceValue |
Value the chart's horizontal reference line marks (default station only). |
thresholds.low/high/extreme |
Color-gradient thresholds (default station only). |
- Only the Medium widget size is supported for now. Small, Large, and Lock Screen/StandBy aren't laid out for their own dimensions.
- Apple Watch Smart Stack isn't supported. That requires a native watchOS app with its own WidgetKit extension, built and shipped via Xcode — Scriptable has no companion watch app, so there's no way to get a Scriptable script onto the watch.
- Data and thresholds come entirely from the public hydrodaten.admin.ch API; if a station's response shape changes, parsing may need updating.