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version](https://badge.fury.io/py/gmqtt.svg)](https://badge.fury.io/py/gmqtt)\n[![build status](https://github.com/wialon/gmqtt/actions/workflows/python-package.yml/badge.svg)](https://github.com/github/wialon/gmqtt/workflows/python-package.yml/badge.svg)\n[![Python versions](https://img.shields.io/badge/python-3.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-brightgreen)](https://img.shields.io/badge/python-3.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12-brightgreen)\n[![codecov](https://codecov.io/gh/wialon/gmqtt/branch/master/graph/badge.svg)](https://codecov.io/gh/wialon/gmqtt)\n\n\n### gmqtt: Python async MQTT client implementation.\n\n![](./static/logo.png)\n\n### Installation \n\nThe latest stable version is available in the Python Package Index (PyPi) and can be installed using\n```bash\npip3 install gmqtt\n```\n\n\n### Usage\n#### Getting Started\n\nHere is a very simple example that subscribes to the broker TOPIC topic and prints out the resulting messages:\n\n```python\nimport asyncio\nimport os\nimport signal\nimport time\n\nfrom gmqtt import Client as MQTTClient\n\n# gmqtt also compatibility with uvloop  \nimport uvloop\nasyncio.set_event_loop_policy(uvloop.EventLoopPolicy())\n\n\nSTOP = asyncio.Event()\n\n\ndef on_connect(client, flags, rc, properties):\n    print('Connected')\n    client.subscribe('TEST/#', qos=0)\n\n\ndef on_message(client, topic, payload, qos, properties):\n    print('RECV MSG:', payload)\n\n\ndef on_disconnect(client, packet, exc=None):\n    print('Disconnected')\n\ndef on_subscribe(client, mid, qos, properties):\n    print('SUBSCRIBED')\n\ndef ask_exit(*args):\n    STOP.set()\n\nasync def main(broker_host, token):\n    client = MQTTClient(\"client-id\")\n\n    client.on_connect = on_connect\n    client.on_message = on_message\n    client.on_disconnect = on_disconnect\n    client.on_subscribe = on_subscribe\n\n    client.set_auth_credentials(token, None)\n    await client.connect(broker_host)\n\n    client.publish('TEST/TIME', str(time.time()), qos=1)\n\n    await STOP.wait()\n    await client.disconnect()\n\n\nif __name__ == '__main__':\n    loop = asyncio.get_event_loop()\n\n    host = 'mqtt.flespi.io'\n    token = os.environ.get('FLESPI_TOKEN')\n\n    loop.add_signal_handler(signal.SIGINT, ask_exit)\n    loop.add_signal_handler(signal.SIGTERM, ask_exit)\n\n    loop.run_until_complete(main(host, token))\n``` \n\n### MQTT Version 5.0\ngmqtt supports MQTT version 5.0 protocol\n\n#### Version setup\nVersion 5.0 is used by default. If your broker does not support 5.0 protocol version and responds with proper CONNACK reason code, client will downgrade to 3.1 and reconnect automatically. Note, that some brokers just fail to parse the 5.0 format CONNECT packet, so first check manually if your broker handles this properly. \nYou can also force version in connect method:\n```python\nfrom gmqtt.mqtt.constants import MQTTv311\nclient = MQTTClient('clientid')\nclient.set_auth_credentials(token, None)\nawait client.connect(broker_host, 1883, keepalive=60, version=MQTTv311)\n```\n\n#### Properties\nMQTT 5.0 protocol allows to include custom properties into packages, here is example of passing response topic property in published message:\n```python\n\nTOPIC = 'testtopic/TOPIC'\n\ndef on_connect(client, flags, rc, properties):\n    client.subscribe(TOPIC, qos=1)\n    print('Connected')\n\ndef on_message(client, topic, payload, qos, properties):\n    print('RECV MSG:', topic, payload.decode(), properties)\n\nasync def main(broker_host, token):\n    client = MQTTClient('asdfghjk')\n    client.on_message = on_message\n    client.on_connect = on_connect\n    client.set_auth_credentials(token, None)\n    await client.connect(broker_host, 1883, keepalive=60)\n    client.publish(TOPIC, 'Message payload', response_topic='RESPONSE/TOPIC')\n\n    await STOP.wait()\n    await client.disconnect()\n```\n##### Connect properties\nConnect properties are passed to `Client` object as kwargs (later they are stored together with properties received from broker in `client.properties` field). See example below.\n* `session_expiry_interval` - `int` Session expiry interval in seconds. If the Session Expiry Interval is absent the value 0 is used. If it is set to 0, or is absent, the Session ends when the Network Connection is closed. If the Session Expiry Interval is 0xFFFFFFFF (max possible value), the Session does not expire.\n* `receive_maximum` - `int` The Client uses this value to limit the number of QoS 1 and QoS 2 publications that it is willing to process concurrently.\n* `user_property` - `tuple(str, str)` This property may be used to provide additional diagnostic or other information (key-value pairs).\n* `maximum_packet_size` - `int` The Client uses the Maximum Packet Size (in bytes) to inform the Server that it will not process packets exceeding this limit.\n\nExample:\n```python\nclient = gmqtt.Client(\"lenkaklient\", receive_maximum=24000, session_expiry_interval=60, user_property=('myid', '12345'))\n```\n\n##### Publish properties\nThis properties will be also sent in publish packet from broker, they will be passed to `on_message` callback.\n* `message_expiry_interval` - `int` If present, the value is the lifetime of the Application Message in seconds.\n* `content_type` - `unicode` UTF-8 Encoded String describing the content of the Application Message. The value of the Content Type is defined by the sending and receiving application.\n* `user_property` - `tuple(str, str)`\n* `subscription_identifier` - `int` (see subscribe properties) sent by broker\n* `topic_alias` - `int` First client publishes messages with topic string and kwarg topic_alias. After this initial message client can publish message with empty string topic and same topic_alias kwarg.\n\nExample:\n```python\ndef on_message(client, topic, payload, qos, properties):\n    # properties example here: {'content_type': ['json'], 'user_property': [('timestamp', '1524235334.881058')], 'message_expiry_interval': [60], 'subscription_identifier': [42, 64]}\n    print('RECV MSG:', topic, payload, properties)\n\nclient.publish('TEST/TIME', str(time.time()), qos=1, retain=True, message_expiry_interval=60, content_type='json')\n```\n\n##### Subscribe properties\n* `subscription_identifier` - `int` If the Client specified a Subscription Identifier for any of the overlapping subscriptions the Server MUST send those Subscription Identifiers in the message which is published as the result of the subscriptions.\n\n### Reconnects\nBy default, connected MQTT client will always try to reconnect in case of lost connections. Number of reconnect attempts is unlimited.\nIf you want to change this behaviour, do the following:\n```python\nclient = MQTTClient(\"client-id\")\nclient.set_config({'reconnect_retries': 10, 'reconnect_delay': 60})\n```\nCode above will set number of reconnect attempts to 10 and delay between reconnect attempts to 1min (60s). By default `reconnect_delay=6` and  `reconnect_retries=-1` which stands for infinity.\nNote that manually calling `await client.disconnect()` will set `reconnect_retries` for 0, which will stop auto reconnect.\n\n### Asynchronous on_message callback\nYou can define asynchronous on_message callback.\nNote that it must return valid PUBACK code (`0` is success code, see full list in [constants](gmqtt/mqtt/constants.py#L69))\n```python\nasync def on_message(client, topic, payload, qos, properties):\n    pass\n    return 0\n```\n\n### Other examples\nCheck [examples directory](examples) for more use cases.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwialon%2Fgmqtt","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fwialon%2Fgmqtt","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fwialon%2Fgmqtt/lists"}