fastapi-mqtt

MQTT is a lightweight publish/subscribe messaging protocol designed for M2M (machine to machine) telemetry in low bandwidth environments. Fastapi-mqtt is the client for working with MQTT.

For more information about MQTT, please refer to here: MQTT

Fatapi-mqtt wraps around gmqtt module. Gmqtt Python async client for MQTT client implementation. Module has support of MQTT version 5.0 protocol

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Documentation: FastApi-MQTT

The key feature are:

MQTT specification avaliable with help decarator methods using callbacks:

  • on_connect()

  • on_disconnect()

  • on_subscribe()

  • on_message()

  • subscribe(topic_names)

  • Base Settings available with pydantic class

  • Authetication to broker with credentials

  • unsubscribe certain topics and publish to certain topics


Installation

 $ pip install fastapi-mqtt


Guide

from fastapi import FastAPI
from fastapi_mqtt import FastMQTT, MQTTConfig

app = FastAPI()

mqtt_config = MQTTConfig()

mqtt = FastMQTT(
    config=mqtt_config
)

@app.on_event("startup")
async def startapp():
    await mqtt.connection()

@app.on_event("shutdown")
async def shutdown():
    await mqtt.client.disconnect()

@mqtt.on_connect()
def connect(client, flags, rc, properties):
    mqtt.client.subscribe("/mqtt") #subscribing mqtt topic
    print("Connected: ", client, flags, rc, properties)

@mqtt.on_message()
async def message(client, topic, payload, qos, properties):
    print("Received message: ",topic, payload.decode(), qos, properties)

@mqtt.on_disconnect()
def disconnect(client, packet, exc=None):
    print("Disconnected")

@mqtt.on_subscribe()
def subscribe(client, mid, qos, properties):
    print("subscribed", client, mid, qos, properties)

Publish method:

async def func():
    await mqtt.publish("/mqtt", "Hello from Fastapi") #publishing mqtt topic

    return {"result": True,"message":"Published" }

Subscribe method:

@mqtt.on_connect()
def connect(client, flags, rc, properties):
    mqtt.client.subscribe("/mqtt") #subscribing mqtt topic
    print("Connected: ", client, flags, rc, properties)

Changing connection params

mqtt_config = MQTTConfig(host = "mqtt.mosquito.org",
    port= 1883,
    keepalive = 60,
    username="username",
    password="strong_password")


mqtt = FastMQTT(
    config=mqtt_config)

Contributing

Fell free to open issue and send pull request.

Thanks To Contributors. Contributions of any kind are welcome!

Before you start please read CONTRIBUTING

GitHub

https://github.com/sabuhish/fastapi-mqtt