mirror of
https://github.com/lynchaos/ashvale-station.git
synced 2026-09-12 20:52:23 +00:00
kemal
e27a4b41c8
Seven day outlook moves from History to Live, which now runs four rows. Conditions ahead tightened so the Live column no longer needs a scroller. Adds HumidityCompensator: an additive RH offset estimated by one-step RLS from a trusted hygrometer, clamped to +/-35%, persisted, exposed at POST /api/calibrate/humidity and on the renamed Models and calibration tab. It also implements the psychrometric term (RH moved from element temperature onto air temperature via conserved vapour pressure) but leaves it OFF by default. The thermal argument predicts a hot element reads low; measured against a reference hygrometer this board read 75.4% where the truth was 50.4%, so it reads HIGH and that correction would push it the wrong way. When the flag is enabled, simulate.py applies the exact inverse, per the simulator/compensator trap in DESIGN.md section 2. Models pane rebuilt: the scorecard is one column per target so all 18 heads are visible, and no panel on the tab uses an internal scroller. Verified in Chromium at 1600x900: Live, History and Models all report zero scrollbars, zero clipping, no page scroll, zero console errors. Backtest is numerically identical to the previous commit, confirming the humidity work is a no-op while the flag is off.
591 lines
25 KiB
Python
591 lines
25 KiB
Python
# Copyright 2026 Kemal Yaylali
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""The station: everything wired together and running on its own clocks.
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Four asynchronous loops, deliberately decoupled so a slow one cannot
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starve a fast one:
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sample (2 s) read hardware, run the Kalman bank, keep live state
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persist (30 s) one row to SQLite
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train (10 min) rebuild the feature grid, update every head, re-fit
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climatology, emit a fresh forecast bundle
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verify (5 min) score forecasts whose validity time has arrived, feed
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the errors to conformal calibration and drift
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detection, write the scorecard
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The verify loop is the one most projects skip and the one that makes the
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difference. A forecast that is never scored is an opinion; a forecast
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that is scored against persistence is a measurement.
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"""
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from __future__ import annotations
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import asyncio
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import json
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import time
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from pathlib import Path
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from typing import Any, Dict, List, Optional
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import numpy as np
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from . import physics
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from .config import Config
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from .estimation import SignalTracker
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from .features import build_features
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from .models.anomaly import AnomalyMonitor
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from .models.climatology import HarmonicClimatology
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from .models.nowcast import NowcastEnsemble
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from .models.precip import PrecipitationModel, proxy_wet_label, zambretti
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from .sensors import SenseBoard, enrich
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from .storage import Store, resample
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STATE_VERSION = 1
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class Station:
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def __init__(self, cfg: Config):
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self.cfg = cfg
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self.store = Store(cfg.storage.db_path)
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self.board = SenseBoard(
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rotation=cfg.sensor.rotation_deg,
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low_light=cfg.sensor.low_light,
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tcs_addr=cfg.sensor.tcs3400_addr,
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latitude=cfg.site.latitude,
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longitude=cfg.site.longitude,
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)
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self.tracker = SignalTracker(cfg)
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self.nowcast = NowcastEnsemble(cfg.model.targets, cfg.model.horizons_s, cfg.model)
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self.climatology = HarmonicClimatology(
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cfg.model.targets, min_days_annual=cfg.model.climatology_min_days_annual
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)
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self.precip = PrecipitationModel()
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self.monitor = AnomalyMonitor(cfg.model)
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self.live: Dict[str, Any] = {}
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self.forecast_bundle: Dict[str, Any] = {}
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self.outlook_bundle: Dict[str, Any] = {}
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self.precip_bundle: Dict[str, Any] = {}
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self.anomaly_bundle: Dict[str, Any] = {}
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self.last_train: float = 0.0
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self.last_persist: float = 0.0
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self.last_compact: float = 0.0
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self.training_log: List[Dict] = []
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self._tasks: List[asyncio.Task] = []
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self._stop = asyncio.Event()
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self.state_path = Path(cfg.storage.state_dir) / "station_state.json"
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self.load_state()
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# ------------------------------------------------------------ state
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def save_state(self) -> None:
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payload = {
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"version": STATE_VERSION,
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"saved_at": time.time(),
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"tracker": self.tracker.to_dict(),
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"nowcast": self.nowcast.to_dict(),
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"climatology": self.climatology.to_dict(),
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"precip": self.precip.to_dict(),
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"monitor": self.monitor.to_dict(),
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}
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tmp = self.state_path.with_suffix(".tmp")
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with open(tmp, "w", encoding="utf-8") as fh:
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json.dump(payload, fh)
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tmp.replace(self.state_path) # atomic, survives a power cut mid-write
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def load_state(self) -> bool:
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if not self.state_path.exists():
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return False
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try:
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with open(self.state_path, "r", encoding="utf-8") as fh:
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s = json.load(fh)
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if s.get("version") != STATE_VERSION:
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return False
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self.tracker.load_dict(s["tracker"])
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self.nowcast.load_dict(s["nowcast"])
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self.climatology.load_dict(s["climatology"])
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self.precip.load_dict(s["precip"])
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self.monitor.load_dict(s["monitor"])
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return True
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except Exception as exc:
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self.store.log_event("state", "warn", f"could not restore state: {exc}")
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return False
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# ----------------------------------------------------------- sample
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def sample_once(self) -> Dict[str, Any]:
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ts = time.time()
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raw = self.board.read()
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raw = enrich(raw, self.cfg.site.altitude_m)
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est = self.tracker.step(ts, raw.get("temp_raw", float("nan")),
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raw.get("hum", float("nan")),
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raw.get("press", float("nan")),
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raw.get("cpu_temp", float("nan")))
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temp_c = est["temp_smooth"]
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slp = float(physics.sea_level_pressure(est["press_smooth"], temp_c,
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self.cfg.site.altitude_m))
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dew = float(physics.dew_point(temp_c, est["hum_smooth"]))
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elev, azim = physics.solar_position(ts, self.cfg.site.latitude,
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self.cfg.site.longitude)
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expected = float(physics.clear_sky_irradiance(elev))
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lux = float(raw.get("lux", 0.0) or 0.0)
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cloud = (float(np.clip(1.0 - lux / max(expected * 45.0, 1.0), 0.0, 1.0))
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if elev > 5.0 else 0.5)
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row = {
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"ts": ts,
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"temp_raw": raw.get("temp_raw"),
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"temp_c": est["temp_c"],
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"temp_smooth": temp_c,
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"temp_rate": est["temp_rate"],
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"hum": raw.get("hum"),
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"hum_smooth": est["hum_smooth"],
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"press": raw.get("press"),
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"press_slp": slp,
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"press_smooth": est["press_smooth"],
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"press_rate": est["press_rate"],
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"cpu_temp": raw.get("cpu_temp"),
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"dew_c": dew,
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"lux": lux,
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"r": raw.get("r"), "g": raw.get("g"), "b": raw.get("b"),
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"pitch": raw.get("pitch"), "roll": raw.get("roll"),
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"yaw": raw.get("yaw"), "compass": raw.get("compass"),
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"ax": raw.get("ax"), "ay": raw.get("ay"), "az": raw.get("az"),
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"gx": raw.get("gx"), "gy": raw.get("gy"), "gz": raw.get("gz"),
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}
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anomaly = self.monitor.observe(ts, {
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"temp_c": temp_c, "hum": est["hum_smooth"], "press_slp": slp,
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"temp_rate": est["temp_rate"], "press_rate": est["press_rate"],
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"dew_c": dew, "cpu_temp": raw.get("cpu_temp"),
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})
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self.anomaly_bundle = anomaly
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self.live = {
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**row,
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"timestamp": time.strftime("%H:%M:%S", time.localtime(ts)),
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"colour": raw.get("colour", {}),
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"simulated": bool(raw.get("simulated", not self.board.available)),
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"dew_depression": temp_c - dew,
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"vpd": float(physics.vapour_pressure_deficit(temp_c, est["hum_smooth"])),
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"wet_bulb": float(physics.wet_bulb(temp_c, est["hum_smooth"])),
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"heat_index": float(physics.heat_index(temp_c, est["hum_smooth"])),
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"abs_humidity": float(physics.absolute_humidity(temp_c, est["hum_smooth"])),
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"solar_elevation": float(elev),
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"solar_azimuth": float(azim),
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"clear_sky_wm2": expected,
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"cloud_index": cloud,
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"cpu_offset": (raw.get("cpu_temp") or float("nan")) - (raw.get("temp_raw") or float("nan")),
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"compensator_k": self.tracker.compensator.k,
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"hum_offset": self.tracker.hum_compensator.offset,
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"hum_psychrometric": float(est["hum_c"]) - float(raw.get("hum") or float("nan")),
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"health": anomaly["health_overall"],
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"novelty_d2": anomaly["novelty"].get("d2", 0.0),
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}
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self._update_precip()
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return self.live
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def _observation_vector(self) -> Dict[str, float]:
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live = self.live
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hist = self.store.window(8.0, ["ts", "press_slp", "temp_c", "dew_c"])
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tend = {"tend_1h": live.get("press_rate", 0.0),
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"tend_3h": live.get("press_rate", 0.0),
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"tend_6h": live.get("press_rate", 0.0)}
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if hist["ts"].size > 5:
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now = hist["ts"][-1]
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for key, hours in (("tend_1h", 1.0), ("tend_3h", 3.0), ("tend_6h", 6.0)):
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idx = np.searchsorted(hist["ts"], now - hours * 3600.0)
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if 0 <= idx < hist["ts"].size - 1:
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dtp = (now - hist["ts"][idx]) / 3600.0
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if dtp > 0.25:
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tend[key] = float((hist["press_slp"][-1] - hist["press_slp"][idx]) / dtp)
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dew_dep = live.get("dew_depression", 5.0)
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dew_dep_rate = 0.0
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if hist["ts"].size > 5:
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idx = np.searchsorted(hist["ts"], hist["ts"][-1] - 3600.0)
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if 0 <= idx < hist["ts"].size - 1:
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past = hist["temp_c"][idx] - hist["dew_c"][idx]
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dew_dep_rate = float(dew_dep - past)
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return {
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"slp": live.get("press_slp", 1013.25),
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"rh": live.get("hum_smooth", 60.0),
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"dew_depression": dew_dep,
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"dew_dep_rate": dew_dep_rate,
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"cloud_index": live.get("cloud_index", 0.5),
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"temp_dev": self.climatology.anomaly_now(
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"temperature", live.get("ts", time.time()), live.get("temp_smooth", 0.0)
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),
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"wet_bulb_depression": live.get("temp_smooth", 0.0) - live.get("wet_bulb", 0.0),
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**tend,
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}
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def _update_precip(self) -> None:
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obs = self._observation_vector()
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zam = zambretti(obs["slp"], obs["tend_3h"], self.live.get("ts"),
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self.cfg.site.latitude)
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self.precip_bundle = self.precip.predict(obs, zam)
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self.precip_bundle["indoors_caveat"] = self.cfg.site.indoors
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y = proxy_wet_label(obs["rh"], obs["dew_depression"], obs["cloud_index"])
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if y is not None and int(self.live.get("ts", 0)) % 300 < self.cfg.sensor.sample_period_s:
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self.precip.learn(obs, zam, y, strong=False)
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def add_label(self, kind: str, value: float, ts: Optional[float] = None,
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note: str = "") -> Dict:
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"""Human-in-the-loop ground truth. Worth ten times a proxy label."""
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ts = ts or time.time()
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self.store.insert_label(ts, kind, value, note)
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if kind == "rain":
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obs = self._observation_vector()
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zam = zambretti(obs["slp"], obs["tend_3h"], ts, self.cfg.site.latitude)
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loss = self.precip.learn(obs, zam, float(value), strong=True)
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self.store.log_event("label", "info",
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f"strong rain label {value} accepted, loss {loss:.3f}", ts)
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return {"accepted": True, "loss": loss, "strong_labels": self.precip.n_strong}
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return {"accepted": True}
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def calibrate_temperature(self, reference_c: float) -> Dict:
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raw = self.live.get("temp_raw")
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cpu = self.live.get("cpu_temp")
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if raw is None or cpu is None:
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return {"error": "no live reading yet"}
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result = self.tracker.compensator.calibrate(float(raw), float(cpu), float(reference_c))
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self.store.log_event("calibration", "info",
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f"k -> {result['k']:.3f} (residual {result['residual']:+.2f} C)")
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return result
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def calibrate_humidity(self, reference_pct: float) -> Dict:
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raw_h = self.live.get("hum")
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raw_t = self.live.get("temp_raw")
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temp_c = self.live.get("temp_c")
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if raw_h is None or raw_t is None or temp_c is None:
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return {"error": "no live reading yet"}
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result = self.tracker.hum_compensator.calibrate(
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float(raw_h), float(raw_t), float(temp_c), float(reference_pct))
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self.save_state()
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self.store.log_event("calibration", "info",
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f"rh offset -> {result['offset']:+.2f}% "
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f"(residual {result['residual']:+.2f}%)")
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return result
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def reset_humidity_calibration(self) -> Dict:
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from .estimation import HumidityCompensator
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self.tracker.hum_compensator = HumidityCompensator(
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self.cfg.sensor.hum_offset, self.cfg.sensor.hum_offset_min,
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self.cfg.sensor.hum_offset_max,
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psychrometric=self.cfg.sensor.hum_psychrometric,
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)
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self.save_state()
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self.store.log_event("calibration", "info",
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f"rh offset reset to prior {self.cfg.sensor.hum_offset}")
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return {"offset": self.tracker.hum_compensator.offset, "reset": True, "n": 0}
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def reset_calibration(self) -> Dict:
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"""Return the self-heating coefficient to its configured prior.
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Worth having: a single mistyped reference reading can drive `k`
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to its clamp, and because state persists across restarts it will
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stay there quietly biasing every reading until you notice.
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"""
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from .estimation import ThermalCompensator
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self.tracker.compensator = ThermalCompensator(
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self.cfg.sensor.cpu_heat_k, self.cfg.sensor.cpu_heat_k_min,
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self.cfg.sensor.cpu_heat_k_max,
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)
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self.save_state()
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self.store.log_event("calibration", "info",
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f"coefficient reset to prior k={self.cfg.sensor.cpu_heat_k}")
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return {"k": self.tracker.compensator.k, "reset": True, "n": 0}
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# ------------------------------------------------------------ train
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def build_training_grid(self, hours: float = 24 * 30):
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raw = self.store.window(hours, ["ts", "temp_smooth", "hum_smooth",
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"press_slp", "lux"])
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if raw["ts"].size < 10:
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return None
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grid_ts, cols = resample(
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raw["ts"],
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{"temperature": raw["temp_smooth"], "humidity": raw["hum_smooth"],
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"pressure": raw["press_slp"], "lux": raw["lux"]},
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self.cfg.model.grid_s,
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)
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if grid_ts.size < self.cfg.model.min_rows_to_train:
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return None
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X, valid = build_features(
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grid_ts, cols["temperature"], cols["humidity"], cols["pressure"],
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cols["lux"], self.cfg.model.grid_s,
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self.cfg.site.latitude, self.cfg.site.longitude,
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)
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return grid_ts, cols, X, valid
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def train(self, hours: float = 24 * 30) -> Dict:
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t_start = time.time()
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built = self.build_training_grid(hours)
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if built is None:
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return {"trained": False,
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"reason": f"need at least {self.cfg.model.min_rows_to_train} grid rows"}
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grid_ts, cols, X, valid = built
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clim_scores = self.climatology.fit(grid_ts, cols, valid)
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counts = self.nowcast.fit(X, valid, cols, self.climatology, grid_ts)
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self.last_train = time.time()
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self.monitor.clear_retrain_flag()
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entry = {
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"ts": self.last_train,
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"grid_rows": int(grid_ts.size),
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"valid_rows": int(valid.sum()),
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"span_days": round(float((grid_ts[-1] - grid_ts[0]) / 86400.0), 2),
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"pairs": counts,
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"climatology_resid_std": {k: round(v, 3) for k, v in clim_scores.items()},
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"annual_terms": self.climatology.use_annual,
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"seconds": round(time.time() - t_start, 2),
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}
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self.training_log = ([entry] + self.training_log)[:20]
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self.store.log_event("train", "info",
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f"retrained on {grid_ts.size} grid rows in {entry['seconds']}s")
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self.refresh_forecasts()
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self.save_state()
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return {"trained": True, **entry}
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# --------------------------------------------------------- forecast
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def refresh_forecasts(self, persist: bool = True) -> Dict:
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built = self.build_training_grid(hours=48.0)
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now = time.time()
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if built is None or not self.live:
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return {}
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grid_ts, cols, X, valid = built
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x_now = X[-1]
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anchors = {
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"temperature": float(self.live.get("temp_smooth", cols["temperature"][-1])),
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"humidity": float(self.live.get("hum_smooth", cols["humidity"][-1])),
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"pressure": float(self.live.get("press_slp", cols["pressure"][-1])),
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}
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fc = self.nowcast.forecast(x_now, anchors, now, self.climatology)
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bundle: Dict[str, Any] = {"issued_ts": now, "anchors": anchors, "targets": {}}
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for target, per_h in fc.items():
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series = []
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for h in sorted(per_h):
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p = per_h[h]
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series.append({
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"horizon_s": h,
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"horizon_label": _fmt_horizon(h),
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"valid_ts": now + h,
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"mu": round(p["mu"], 3),
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"lo": round(p["lo"], 3),
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"hi": round(p["hi"], 3),
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"delta": round(p["delta"], 3),
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"weights": {k: round(v, 3) for k, v in p["weights"].items()},
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})
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if persist:
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self.store.insert_forecast(now, h, target, p["mu"], p["lo"],
|
|
p["hi"], "ensemble")
|
|
bundle["targets"][target] = series
|
|
self.forecast_bundle = bundle
|
|
|
|
self.outlook_bundle = {
|
|
"issued_ts": now,
|
|
"ready": self.climatology.ready,
|
|
"annual_terms": self.climatology.use_annual,
|
|
"history_days": round(self.store.span_days(), 2),
|
|
"targets": {
|
|
t: self.climatology.outlook(
|
|
t, now, days=7,
|
|
anomaly=self.climatology.anomaly_now(t, now, anchors.get(t, 0.0)),
|
|
)
|
|
for t in self.cfg.model.targets
|
|
},
|
|
}
|
|
return bundle
|
|
|
|
# ----------------------------------------------------------- verify
|
|
|
|
def verify(self) -> Dict:
|
|
"""Score matured forecasts against truth and against persistence."""
|
|
due = self.store.due_forecasts()
|
|
if not due:
|
|
return {"scored": 0}
|
|
|
|
hist = self.store.window(24 * 8, ["ts", "temp_smooth", "hum_smooth", "press_slp"])
|
|
if hist["ts"].size < 5:
|
|
return {"scored": 0}
|
|
series = {"temperature": hist["temp_smooth"], "humidity": hist["hum_smooth"],
|
|
"pressure": hist["press_slp"]}
|
|
|
|
def value_at(target: str, ts: float) -> Optional[float]:
|
|
idx = int(np.searchsorted(hist["ts"], ts))
|
|
if idx <= 0 or idx >= hist["ts"].size:
|
|
return None
|
|
if abs(hist["ts"][idx] - ts) > 900:
|
|
return None
|
|
return float(series[target][idx])
|
|
|
|
buckets: Dict[tuple, Dict[str, List[float]]] = {}
|
|
scored = 0
|
|
for row in due:
|
|
target, h = row["target"], int(row["horizon_s"])
|
|
truth = value_at(target, row["valid_ts"])
|
|
anchor = value_at(target, row["issued_ts"])
|
|
if truth is None or anchor is None:
|
|
continue
|
|
key = (target, h)
|
|
b = buckets.setdefault(key, {"err": [], "pers": [], "cov": []})
|
|
err = truth - row["mu"]
|
|
b["err"].append(err)
|
|
b["pers"].append(truth - anchor)
|
|
b["cov"].append(1.0 if row["lo"] <= truth <= row["hi"] else 0.0)
|
|
head = self.nowcast.heads.get(key)
|
|
if head is not None:
|
|
head.conformal.observe(err, covered=bool(row["lo"] <= truth <= row["hi"]))
|
|
if h <= 10800:
|
|
self.monitor.observe_error(row["valid_ts"], abs(err))
|
|
scored += 1
|
|
|
|
now = time.time()
|
|
for (target, h), b in buckets.items():
|
|
e = np.asarray(b["err"], dtype=float)
|
|
p = np.asarray(b["pers"], dtype=float)
|
|
mae = float(np.mean(np.abs(e)))
|
|
mae_p = float(np.mean(np.abs(p)))
|
|
self.store.insert_score(
|
|
now, target, h,
|
|
mae=mae,
|
|
rmse=float(np.sqrt(np.mean(e ** 2))),
|
|
bias=float(np.mean(e)),
|
|
mae_persistence=mae_p,
|
|
skill=float(1.0 - mae / mae_p) if mae_p > 1e-9 else 0.0,
|
|
coverage=float(np.mean(b["cov"])),
|
|
n=int(e.size),
|
|
)
|
|
|
|
with self.store._conn() as conn:
|
|
conn.execute("DELETE FROM forecasts WHERE valid_ts <= ?", (now - 3600,))
|
|
return {"scored": scored, "buckets": len(buckets)}
|
|
|
|
# ------------------------------------------------------------ loops
|
|
|
|
async def _loop_sample(self):
|
|
period = self.cfg.sensor.sample_period_s
|
|
while not self._stop.is_set():
|
|
try:
|
|
self.sample_once()
|
|
now = time.time()
|
|
if now - self.last_persist >= self.cfg.sensor.persist_period_s:
|
|
self.store.insert_telemetry(self.live)
|
|
self.last_persist = now
|
|
except Exception as exc:
|
|
self.store.log_event("sample", "error", repr(exc))
|
|
await asyncio.sleep(period)
|
|
|
|
async def _loop_train(self):
|
|
await asyncio.sleep(5)
|
|
try:
|
|
self.train()
|
|
except Exception as exc:
|
|
self.store.log_event("train", "error", repr(exc))
|
|
while not self._stop.is_set():
|
|
await asyncio.sleep(30)
|
|
now = time.time()
|
|
due = (now - self.last_train) >= self.cfg.model.train_period_s
|
|
if due or self.monitor.retrain_requested:
|
|
try:
|
|
await asyncio.to_thread(self.train)
|
|
except Exception as exc:
|
|
self.store.log_event("train", "error", repr(exc))
|
|
|
|
async def _loop_verify(self):
|
|
await asyncio.sleep(60)
|
|
while not self._stop.is_set():
|
|
try:
|
|
await asyncio.to_thread(self.verify)
|
|
except Exception as exc:
|
|
self.store.log_event("verify", "error", repr(exc))
|
|
await asyncio.sleep(300)
|
|
|
|
async def _loop_maintenance(self):
|
|
while not self._stop.is_set():
|
|
await asyncio.sleep(3600)
|
|
now = time.time()
|
|
if now - self.last_compact >= self.cfg.storage.vacuum_period_s:
|
|
try:
|
|
removed = await asyncio.to_thread(
|
|
self.store.compact,
|
|
self.cfg.storage.raw_retention_days,
|
|
self.cfg.storage.five_min_retention_days,
|
|
)
|
|
self.last_compact = now
|
|
self.store.log_event("compact", "info", json.dumps(removed))
|
|
except Exception as exc:
|
|
self.store.log_event("compact", "error", repr(exc))
|
|
self.save_state()
|
|
|
|
def start(self) -> None:
|
|
self._stop.clear()
|
|
self._tasks = [
|
|
asyncio.create_task(self._loop_sample()),
|
|
asyncio.create_task(self._loop_train()),
|
|
asyncio.create_task(self._loop_verify()),
|
|
asyncio.create_task(self._loop_maintenance()),
|
|
]
|
|
|
|
async def stop(self) -> None:
|
|
self._stop.set()
|
|
for t in self._tasks:
|
|
t.cancel()
|
|
for t in self._tasks:
|
|
try:
|
|
await t
|
|
except (asyncio.CancelledError, Exception):
|
|
pass
|
|
try:
|
|
self.save_state()
|
|
except Exception:
|
|
pass
|
|
|
|
# ------------------------------------------------------------ views
|
|
|
|
def status(self) -> Dict:
|
|
return {
|
|
"site": self.cfg.site.name,
|
|
"hardware": "sense-hat-v2" if self.board.available else "simulator",
|
|
"colour_sensor": self.board.has_colour,
|
|
"rows": self.store.row_count(),
|
|
"history_days": round(self.store.span_days(), 3),
|
|
"last_train": self.last_train,
|
|
"next_train_in_s": max(0.0, self.cfg.model.train_period_s
|
|
- (time.time() - self.last_train)),
|
|
"climatology_ready": self.climatology.ready,
|
|
"annual_terms": self.climatology.use_annual,
|
|
"compensator_k": round(self.tracker.compensator.k, 4),
|
|
"calibrations": self.tracker.compensator.n_calibrations,
|
|
"health": self.monitor.health.overall,
|
|
"drift_stress": round(self.monitor.drift.stress, 3),
|
|
"retrain_requested": self.monitor.retrain_requested,
|
|
"training_log": self.training_log[:5],
|
|
}
|
|
|
|
|
|
def _fmt_horizon(seconds: int) -> str:
|
|
if seconds < 3600:
|
|
return f"{seconds // 60}m"
|
|
if seconds < 86400:
|
|
return f"{seconds // 3600}h"
|
|
return f"{seconds // 86400}d"
|