Energyclient ((exclusive)) ❲2024-2026❳

import requests import sqlite3 import time from dataclasses import dataclass from datetime import datetime, timezone @dataclass class EnergyClient: api_root: str meter_id: str token: str

"timestamp": "2025-03-15T10:00:00Z", "device_id": "meter_001", "measurements": "power_w": 1243.5, "energy_wh_cumulative": 1203400, "voltage_v": 239.2, "current_a": 5.2, "frequency_hz": 50.02 , "tariff": "off_peak" energyclient

def _init_db(self): self.conn = sqlite3.connect("energy_cache.db") self.conn.execute(""" CREATE TABLE IF NOT EXISTS readings ( ts TEXT PRIMARY KEY, power_w REAL, cumulative_wh REAL ) """) import requests import sqlite3 import time from dataclasses

def __post_init__(self): self._init_db() self.session = requests.Session() self.session.headers.update("Authorization": f"Bearer self.token") "measurements": "power_w": 1243.5

from oauthlib.oauth2 import BackendApplicationClient from requests_oauthlib import OAuth2Session client = BackendApplicationClient(client_id=CLIENT_ID) oauth = OAuth2Session(client=client) token = oauth.fetch_token(token_url=TOKEN_URL, client_secret=CLIENT_SECRET) Typical core entities:

def fetch_latest(self): resp = self.session.get(f"self.api_root/meters/self.meter_id/reading") resp.raise_for_status() data = resp.json() # Cache it self.conn.execute( "INSERT OR REPLACE INTO readings (ts, power_w, cumulative_wh) VALUES (?, ?, ?)", (datetime.now(timezone.utc).isoformat(), data["power_w"], data["cumulative_wh"]) ) self.conn.commit() return data