eac-dso-portal

Async Python client for the EAC (Electricity Authority of Cyprus) Distribution Web Portal at meterreading-dso.eac.com.cy.

The portal exposes an undocumented JSON API behind a JWT-authenticated session. This package wraps it in a small aiohttp-based client with typed dataclasses.

Install

pip install eac-dso-portal

Requires Python 3.11+.

Usage

import asyncio
from datetime import datetime, timedelta, timezone
import aiohttp
from eac_dso_portal import EacClient

async def main() -> None:
    async with aiohttp.ClientSession() as session:
        client = EacClient("you@example.com", "password", session=session)
        await client.login()

        for sp in await client.list_service_points():
            if not sp.active:
                continue
            print(sp.id, sp.address)

            # Default channels are the daily totals.
            end = datetime.now(timezone.utc)
            start = end - timedelta(days=14)
            for cr in await client.get_readings(sp.id, start, end):
                for r in cr.readings:
                    print(f"  {r.dt.isoformat()}  {r.reading} kWh (delta {r.value})")

asyncio.run(main())

What's in the API

All return values are immutable dataclasses. Each model also carries a .raw dict so callers can read fields the wrapper has not yet promoted into typed attributes.

The 1000-row response cap

The portal silently truncates any /readings/list response that would exceed 1000 rows. For a 30-minute load profile that hits the limit after about 21 days. get_readings works around this by splitting wide requests into 14-day chunks (configurable via chunk_days) and merging the results, dropping duplicates that appear on chunk boundaries. The public signature is unchanged from earlier versions, so callers do not have to do anything special.

Errors

• EacAuthError: login was rejected, or token refresh failed.
• EacRateLimitError: HTTP 429 from the portal.
• EacApiError: any other non-2xx response. Carries .status, .message, .path.
• EacError: base class for all of the above.

Status and scope

A thin wrapper around an undocumented portal API, built primarily to drive the ha-eac Home Assistant integration. The endpoint set and field names follow what the portal's React frontend uses today, and the API may change without notice on EAC's side. Every model carries a .raw payload so consumers can read fields the wrapper has not yet typed.

License

MIT