pyrustuyabridge 0.2.0rc18

Python bindings for rustuyabridge — an MQTT bridge for Tuya devices

pyrustuyabridge

Python bindings for rustuya-bridge, an MQTT bridge for managing Tuya devices via the Tuya Local API.

This package exposes the bridge server as an embeddable component, so Python code can run it alongside and interpret MQTT topics/payloads identically to the native bridge.

Install

pip install pyrustuyabridge

Pre-built wheels are provided for Linux (manylinux2014 / musllinux_1_2 on x86_64 and aarch64), Windows x64, and macOS (x86_64 / arm64). Wheels are built with PyO3 abi3-py39, so a single wheel per platform supports CPython 3.9 and newer.

Quick start

import asyncio
from pyrustuyabridge import PyBridgeServer

async def main():
    server = PyBridgeServer(
        mqtt_broker="mqtt://localhost:1883",
        mqtt_root_topic="rustuya",
    )
    await server.start_async()

asyncio.run(main())

Keeping the bridge running across reconfigure

The bridge is meant to be driven entirely over MQTT — including config changes. To apply a change to the topic/payload templates or mqtt_retain, edit the config_path file and publish a reconfigure action to the command topic. The bridge clears the retained messages published under the old scheme and then exits cleanly so the new config can take effect — exactly like the native binary under systemd Restart=always.

In an embedded host there is no external supervisor, so wrap the server in a small recreate loop. An intentional shutdown stops the supervisor (not the bridge); any other exit — reconfigure or a crash — recreates it, re-reading config_path:

# asyncio
import asyncio
from pyrustuyabridge import PyBridgeServer

class AsyncBridgeSupervisor:
    def __init__(self, **kwargs):
        self._kwargs = {**kwargs, "no_signals": True}  # host owns signals
        self._stop, self._server = False, None

    async def run(self):
        while not self._stop:
            self._server = PyBridgeServer(**self._kwargs)  # re-reads config_path
            try:
                await self._server.start_async()           # returns on reconfigure/stop
            except Exception as e:
                print("bridge exited with error, restarting:", e)
                await asyncio.sleep(5)

    def stop(self):
        self._stop = True
        if self._server:
            self._server.stop()

# asyncio.run(AsyncBridgeSupervisor(config_path="/etc/rustuya/config.json").run())

# thread
import threading, time
from pyrustuyabridge import PyBridgeServer

class BridgeSupervisor:
    def __init__(self, **kwargs):
        self._kwargs = {**kwargs, "no_signals": True}
        self._stop = threading.Event()
        self._server = None

    def run(self):                                   # run in a thread (blocking)
        while not self._stop.is_set():
            self._server = PyBridgeServer(**self._kwargs)
            try:
                self._server.start()                 # blocks until reconfigure/stop
            except Exception as e:
                print("bridge exited with error, restarting:", e)
                time.sleep(5)

    def stop(self):
        self._stop.set()
        if self._server:
            self._server.stop()

Config precedence is kwargs > config_path file > defaults (the file only fills fields left unset). So put any field you want to change via reconfigure in the file, not in kwargs — a field passed as a kwarg wins and the file edit is ignored (same rule as CLI flags vs. config file in the native binary).

Helpers

The module also exposes topic/payload utilities for code that needs to match the bridge's wire format:

• tpl_to_wildcard(template, root_topic) — template → MQTT wildcard.
• match_topic(topic, template) — returns extracted variables or None.
• render_template(template, vars) — substitutes {key} placeholders.
• parse_payload(payload, vars) — parses an MQTT payload into a structured value.
• parse_payload_with_template(payload, template) — reverse of render_template: recovers placeholder values from a rendered payload, or None if not reversible.
• validate_payload_template(template) — (ok, message); checks whether a payload template can be reverse-parsed.

See the project repository for full documentation.