This release is a pre-release and may not be stable for production use.
Python Client for the OHF Matter Server
A PyPI package (matter-python-client) providing Python bindings for the OHF Matter Server. This is a drop-in replacement for the client portion of python-matter-server, with custom cluster definitions updated to match the Matter.js server.
Origin
The client and common modules were copied from python-matter-server v8.1.2 and modified:
- Source:
matter_server/client/andmatter_server/common/from python-matter-server - Modified:
matter_server/common/custom_clusters.py— updated to match the JS server's cluster definitions - Excluded:
matter_server/server/(the JS server replaces it),common/helpers/logger.py(depends oncoloredlogs, a server-only dependency)
Custom Cluster Changes
| Cluster | Change |
|---|---|
| EveCluster | +8 attributes (getConfig, setConfig, loggingMetadata, loggingData, lastEventTime, statusFault, childLock, rloc16), wattAccumulatedControlPoint type fixed |
| HeimanCluster | Attribute IDs shortened to match JS server |
| NeoCluster | Types changed from float32 to uint |
| Polling | Removed (JS server handles polling natively) |
Package
- PyPI name:
matter-python-client - Python module:
matter_server(same import path aspython-matter-server) - Python: >= 3.12
- Dependencies:
aiohttp,orjson,home-assistant-chip-clusters
npm Scripts (from monorepo root)
# First-time setup: create venv and install with test dependencies
npm run python:install
# Run unit + mock server tests (fast, ~1s)
npm run python:test
# Run full integration tests against real Matter.js server + test device (~40s)
npm run python:test-integration
# Run all Python tests
npm run python:test-all
# Build the PyPI package (.tar.gz + .whl)
npm run python:build
Usage
The package provides the same matter_server.client API as python-matter-server:
import aiohttp
from matter_server.client import MatterClient
async with aiohttp.ClientSession() as session:
client = MatterClient("ws://localhost:5580/ws", session)
await client.connect()
init_ready = asyncio.Event()
listen_task = asyncio.create_task(client.start_listening(init_ready))
await init_ready.wait()
nodes = client.get_nodes()
To reach a server that listens on a unix socket (--listen-address /path/to/socket), pass
unix:///path/to/socket as the server URL. The client then opens its own session on that socket
for the WebSocket and the OTA upload, and the session passed in stays unused.
OHF-only extensions
Beyond the python-matter-server API, the client exposes commands the Matter.js server adds:
-
get_network_topology(refresh=False)— the Thread/Wi-Fi network as a graph (schema 13+) -
upload_ota_file(image)— store a local.otafirmware image in the server's OTA image store (schema 13+). Takes the raw bytes or a path; reserves an upload id over the WebSocket session, then streams the bytes toPOST /ota-upload/<upload_id>. RaisesOtaUploadError(code 101) for a corrupt image, an expired/spent id, or disabled OTA support. -
get_icd_state,register_icd,unregister_icd,resync_icd— ICD Check-In registration -
camera_get_capabilities,camera_start_stream,camera_provide_answer,camera_provide_ice_candidates,camera_stop_stream,camera_snapshot,camera_release_stream— the camera API (schema 14+).camera_get_capabilities,camera_start_stream,camera_stop_streamandcamera_snapshotreturn dataclasses frommatter_server.common.models; the other three returnNone.camera_start_stream'svideo/audiotakeNone(the server decides), aCameraVideoHints/CameraAudioHintsdict, orFalse(no such track).talkback=Truelets the offer ask the camera to play your audio; without it the server makes the offer's audio sections not send, so a browser-stylesendrecvaudio offer goes to the camera asrecvonly.camera_session_endedandcamera_stream_evictedevents arrive asCameraSessionEndedData/CameraStreamEvictedData;webrtc_callbackstays a dict. Errors 102 to 106 (CameraStreamIncompatible, ...) expose their details as attributes, e.g.err.reasonanderr.boundonCameraStreamIncompatibleThe minimal
camera_start_streamcall isnode_id,endpoint_id,stream_usageand your SDP offer: the server reuses or allocates the best stream the camera can serve that still fits what the offer can decode, and adds audio when it can. Passvideo/audiohints only to set hard bounds. A session opened this way is driven withcamera_provide_answer,camera_provide_ice_candidatesandcamera_stop_streamonly, not withsend_webrtc_provider_commandor asend_device_commandEndSession: the server tracks the session and its streams, and only thecamera_*methods keep that record correct. The exception is a re-offer (ICE restart), which goes throughsend_webrtc_provider_command. Seedocs/websockets_api.mdfor the flow and every option.
try:
result = await client.camera_start_stream(node_id, 1, "LiveView", sdp=offer)
except CameraStreamIncompatible as err:
print(err.reason, err.bound)
else:
# The camera's answer arrives as a webrtc_callback "answer" event for this session.
print(result.webrtc_session_id, result.video.codec if result.video else None)
version = await client.upload_ota_file("/path/to/firmware.ota")
print(version.vid, version.pid, version.software_version)
To use this package instead of python-matter-server in the Home Assistant Matter integration, change manifest.json:
- "requirements": ["python-matter-server==8.1.2"],
+ "requirements": ["matter-python-client==1.0.0"],
Testing
The test suite has three layers:
- Import smoke tests (8 tests) — verify all HA integration imports resolve
- Mock server tests (4 tests) — Python client against JS MockMatterServer subprocess
- Integration tests (63 tests) — Python client against real Matter.js server + test device, mirroring the JS
IntegrationTest.ts
1 maintainer
Metadata
1 maintainer
Release files for matter-python-client 1.5.0a0.dev20261014
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| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| matter_python_client-1.5.0a0.dev20261014-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 583.8 kB
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