WetterCube/Screens und Funktionen/en
Screens
| # | Screen | Content |
|---|---|---|
| 1 | Main screen | time, date, current temperature (colored), weather icon, wind speed and direction |
| 4 | 3 h forecast | time, icon and temperature for the next 3 hours |
| 2 | Humidity / pressure | humidity, air pressure, feels-like temperature |
| 3 | UV / sun | UV index (daily maximum), sunrise, sunset |
| 5 | Pollen | birch, grasses, alder, mugwort, ragweed with level (none / low / moderate / high / very high) |
| 6 | Air quality | ozone, PM10, PM2.5 and European air quality index (EU AQI), colored by limit values |
| – | Rain warning | red, flashing full-screen |
| – | Pollen warning | orange, flashing full-screen with the affected allergen |
The numbers are the names used in the web interface. The order on the device is 1 → 4 → 2 → 3 → 5 → 6 → 1. All screens except the main screen can be switched off individually in the web interface (see Settings).
Operating with the button
The cube has a single touch button (TTP223):
| Situation | Effect of a button press |
|---|---|
| display is dimmed or off in night mode | display lights up (for 15 seconds in night mode), no screen change |
| rain or pollen warning active | the warning is acknowledged, the cube jumps to the main screen |
| otherwise | switches to the next active screen (skips disabled ones) |
There are at least 0.5 seconds between two presses.
Colors
- Temperature: red from 24 °C, yellow from 15 °C, green from 8 °C, blue below.
- Pollen: none (gray), low ≤10 (green), moderate ≤30 (yellow), high ≤100 (orange), very high >100 (red). Values are pollen grains per m³.
- Air quality: four colors based on the limit values of the EEA's European Air Quality Index (2024 revision). "Good" and "Fair" are merged into green. The raw value is shown (µg/m³, for the AQI the index itself).
| Value | Green | Yellow | Orange | Red |
|---|---|---|---|---|
| Ozone (O₃) | ≤ 100 | ≤ 120 | ≤ 160 | > 160 |
| Particulates PM10 | ≤ 45 | ≤ 120 | ≤ 195 | > 195 |
| Particulates PM2.5 | ≤ 15 | ≤ 50 | ≤ 90 | > 90 |
| EU AQI | ≤ 40 | ≤ 60 | ≤ 80 | > 80 |
Warnings
Rain warning: at every weather update the next 2 hours are checked. If drizzle, rain, showers or thunderstorms are coming (WMO codes 51–67, 80–82, 95 and up), the cube jumps to a red, flashing screen. A button press acknowledges it. After that there is no new warning for this rain period; only when the next 2 hours are dry again is it re-armed for the next rain.
Pollen warning: triggers when one of the five allergens exceeds the configured threshold (moderate >10, high >30, very high >100). The orange, flashing screen names the allergen and level, e.g. "Birke: Hoch". A button press acknowledges it. When all values drop below the threshold again, the warning is re-armed for next time.
Both warnings can be switched off in the web interface.
Weather icons
The icons (Meteocons by Bas Milius, MIT) distinguish day and night (sun or moon behind the cloud, based on Open-Meteo's is_day field) and the intensity of rain, snow and thunderstorms: the heavier, the darker and thicker the cloud. This applies to the 3 h forecast too, whose icons are chosen per hour for day or night. Mapping of the weather codes (WMO):
| Weather | WMO code | Day | Night |
|---|---|---|---|
| Clear | 0 |  |
|
| Mostly clear | 1 |  |
|
| Partly cloudy | 2 |  |
|
| Overcast | 3 |  |
|
| Fog, freezing fog | 45, 48 |  |
|
| Drizzle | 51, 53 |  |
|
| Light rain, light showers | 61, 80 |  |
|
| Rain, dense drizzle, showers | 55, 63, 81 |  |
|
| Heavy rain, violent showers | 65, 82 |  |
|
| Freezing rain or drizzle | 56, 57, 66, 67 |  |
|
| Light snow, snow grains, light showers | 71, 77, 85 |  |
|
| Snowfall | 73 |  |
|
| Heavy snow, heavy showers | 75, 86 |  |
|
| Thunderstorm (also with hail) | 95, 96, 99 |  |
|
Data sources
| Data | Source | Interval |
|---|---|---|
| Weather, 3 h forecast, UV, sun | Open-Meteo (forecast) | 15 min |
| Pollen, ozone, PM10, PM2.5, EU AQI | Open-Meteo Air Quality (one shared request) | 15 min |
| Coordinates for the city | Open-Meteo Geocoding (once per location, then stored in flash) | – |
| Time | NTP (Europe/Berlin time zone) | at start |
All data is free and needs no API key.