Ryan Malloy
83d85a9885
custom_components/omni_pca/services.yaml — declares 7 services with config_entry selectors so HA's UI gives users a panel picker: bypass_zone, restore_zone, execute_program, show_message, clear_message, acknowledge_alerts, send_command (raw escape hatch) custom_components/omni_pca/services.py — async handlers wired via async_setup_services on entry setup; idempotent across multiple entries. Each handler validates entry_id, looks up the right coordinator, calls the matching OmniClient method. CommandFailedError wrapped to HomeAssistantError; unknown Command codes raise ServiceValidationError. async_unload_services removes them when the last entry unloads. custom_components/omni_pca/diagnostics.py — async_get_config_entry_ diagnostics dumps a redacted snapshot for bug reports: panel model + firmware, discovered/live counts per object type, sha256-hashed zone/ unit/area names (so uniqueness is visible without leaking PII), last event class, controller key REDACTED via async_redact_data. custom_components/omni_pca/__init__.py — wires async_setup_services on entry setup and async_unload_services on the last entry unload. custom_components/omni_pca/README.md — full entity table, service list, example automation, troubleshooting section, link to JOURNEY.md. Top-level README — entity rundown updated to reflect the full v1.0 surface (was: 'binary_sensor for zones'). 331 tests still pass; ruff clean across src/ tests/ custom_components/. hacs.json already in place from initial scaffold.
omni-pca
Async Python client for HAI/Leviton Omni-Link II home automation panels — Omni Pro II, Omni IIe, Omni LTe, Lumina.
Includes a Home Assistant custom component (custom_components/omni_pca/).
Status
Alpha. Built from a full reverse-engineering of HAI's PC Access 3.17 (the Windows installer/programmer app). The protocol layer captures two non-public quirks that public Omni-Link clients miss:
- Session key is not the ControllerKey. Last 5 bytes are XORed with a controller-supplied SessionID nonce.
- Per-block XOR pre-whitening before AES. First two bytes of every 16-byte block are XORed with the packet's sequence number.
See docs/PROTOCOL.md for the full byte-level spec.
Quick start (library)
uv add omni-pca
import asyncio
from omni_pca import OmniClient
async def main():
async with OmniClient(
host="192.168.1.9",
port=4369,
controller_key=bytes.fromhex("6ba7b4e9b4656de3cd7edd4c650cdb09"),
) as panel:
info = await panel.get_system_info()
print(info.model_name, info.firmware_version)
asyncio.run(main())
Quick start (Home Assistant)
Copy custom_components/omni_pca/ into your HA config/custom_components/, restart HA, then add the integration via Settings → Devices & Services. You'll need:
- Panel IP / hostname
- TCP port (default 4369)
- ControllerKey as 32 hex chars
Get the ControllerKey from your .pca file using the included parser:
uvx --from omni-pca omni-pca decode-pca path/to/Your.pca --field controller_key
The integration creates one HA device per panel plus typed entities for every named object on the controller: alarm_control_panel for areas, light for units, binary_sensor/switch for zones (state + bypass), climate for thermostats, sensor for analog zones and panel telemetry, button for panel macros, and event for the typed push-notification stream. See custom_components/omni_pca/README.md for the entity table and service list.
Without a panel — mock controller
For testing, the library ships a minimal Omni controller emulator:
from omni_pca.mock_panel import MockPanel
async with MockPanel(controller_key=...).serve(port=14369):
# connect a real OmniClient to localhost:14369 — works end-to-end
...
Versioning
Date-based (CalVer): YYYY.M.D. Bumped on backwards-incompatible changes.
Acknowledgments
This client is independent and not affiliated with Leviton or HAI. Protocol details derived from clean-room analysis of the publicly-distributed PC Access installer.