Initial commit: ShellyDash dashboard fotovoltaico
Flask app con gauge Chart.js custom, polling Shelly Cloud API v2, storico SQLite, due widget gauge (produzione/consumo) con scala graduata.
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"""SQLite database manager for ShellyDash."""
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from __future__ import annotations
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import sqlite3
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import time
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from datetime import datetime, timezone
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from pathlib import Path
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DB_PATH = Path(__file__).parent / "data" / "shellydash.db"
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class Database:
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"""Manage readings storage and queries."""
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def __init__(self, db_path: str | Path = DB_PATH):
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self.db_path = Path(db_path)
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self.db_path.parent.mkdir(parents=True, exist_ok=True)
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self._init_schema()
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def _connect(self) -> sqlite3.Connection:
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conn = sqlite3.connect(str(self.db_path))
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conn.row_factory = sqlite3.Row
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conn.execute("PRAGMA journal_mode=WAL")
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return conn
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def _init_schema(self):
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with self._connect() as conn:
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conn.executescript("""
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CREATE TABLE IF NOT EXISTS readings (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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ts INTEGER NOT NULL, -- unix timestamp
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ch0_act_power REAL,
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ch0_aprt_power REAL,
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ch0_current REAL,
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ch0_voltage REAL,
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ch0_pf REAL,
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ch0_total_act_energy REAL,
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ch0_total_ret_energy REAL,
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ch1_act_power REAL,
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ch1_aprt_power REAL,
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ch1_current REAL,
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ch1_voltage REAL,
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ch1_pf REAL,
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ch1_total_act_energy REAL,
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ch1_total_ret_energy REAL,
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switch_output INTEGER,
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temperature REAL,
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wifi_rssi INTEGER,
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online INTEGER,
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uptime INTEGER
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);
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CREATE INDEX IF NOT EXISTS idx_readings_ts ON readings(ts);
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""")
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def insert_reading(self, r: dict) -> int | None:
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ts = int(r.get("unixtime") or time.time())
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with self._connect() as conn:
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cur = conn.execute(
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"""INSERT INTO readings (
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ts, ch0_act_power, ch0_aprt_power, ch0_current, ch0_voltage,
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ch0_pf, ch0_total_act_energy, ch0_total_ret_energy,
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ch1_act_power, ch1_aprt_power, ch1_current, ch1_voltage,
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ch1_pf, ch1_total_act_energy, ch1_total_ret_energy,
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switch_output, temperature, wifi_rssi, online, uptime
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) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)""",
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(
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ts,
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r.get("ch0_act_power"),
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r.get("ch0_aprt_power"),
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r.get("ch0_current"),
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r.get("ch0_voltage"),
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r.get("ch0_pf"),
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r.get("ch0_total_act_energy"),
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r.get("ch0_total_ret_energy"),
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r.get("ch1_act_power"),
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r.get("ch1_aprt_power"),
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r.get("ch1_current"),
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r.get("ch1_voltage"),
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r.get("ch1_pf"),
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r.get("ch1_total_act_energy"),
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r.get("ch1_total_ret_energy"),
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1 if r.get("switch_output") else 0,
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r.get("temperature"),
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r.get("wifi_rssi"),
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1 if r.get("online") else 0,
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r.get("uptime"),
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),
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)
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return cur.lastrowid
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def get_latest(self) -> dict | None:
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"""Return the most recent reading."""
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with self._connect() as conn:
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row = conn.execute(
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"SELECT * FROM readings ORDER BY ts DESC LIMIT 1"
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).fetchone()
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return dict(row) if row else None
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def get_history(self, hours: int = 24) -> list[dict]:
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"""Return readings for the last N hours, sampled ~ every 60s."""
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since = int(time.time()) - hours * 3600
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with self._connect() as conn:
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rows = conn.execute(
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"""SELECT * FROM readings
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WHERE ts >= ?
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ORDER BY ts ASC""",
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(since,),
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).fetchall()
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return [dict(r) for r in rows]
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def get_energy_today(self) -> dict:
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"""Return total energy produced/consumed today."""
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t = datetime.now(timezone.utc)
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start_of_day = int(t.replace(hour=0, minute=0, second=0, microsecond=0).timestamp())
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with self._connect() as conn:
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row = conn.execute(
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"""SELECT
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MAX(ch0_total_act_energy) - MIN(ch0_total_act_energy) AS ch0_energy,
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MAX(ch0_total_ret_energy) - MIN(ch0_total_ret_energy) AS ch0_ret,
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MAX(ch1_total_act_energy) - MIN(ch1_total_act_energy) AS ch1_energy,
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MAX(ch1_total_ret_energy) - MIN(ch1_total_ret_energy) AS ch1_ret
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FROM readings WHERE ts >= ?""",
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(start_of_day,),
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).fetchone()
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return dict(row) if row else {}
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def get_monthly_energy(self) -> list[dict]:
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"""Return daily energy sums for the current month."""
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t = datetime.now(timezone.utc)
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start_of_month = int(t.replace(day=1, hour=0, minute=0, second=0, microsecond=0).timestamp())
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with self._connect() as conn:
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rows = conn.execute(
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"""SELECT
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date(ts, 'unixepoch') AS day,
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MAX(ch0_total_act_energy) - MIN(ch0_total_act_energy) AS ch0_prod,
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MAX(ch1_total_act_energy) - MIN(ch1_total_act_energy) AS ch1_cons
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FROM readings
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WHERE ts >= ?
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GROUP BY day
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ORDER BY day ASC""",
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(start_of_month,),
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).fetchall()
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return [dict(r) for r in rows]
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def cleanup_old(self, days: int = 365):
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"""Delete readings older than N days."""
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cutoff = int(time.time()) - days * 86400
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with self._connect() as conn:
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conn.execute("DELETE FROM readings WHERE ts < ?", (cutoff,))
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