minimqtt_simpletest.py

# SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
# SPDX-License-Identifier: MIT

import ssl
import socketpool
import wifi
import adafruit_minimqtt.adafruit_minimqtt as MQTT

# Add a secrets.py to your filesystem that has a dictionary called secrets with "ssid" and
# "password" keys with your WiFi credentials. DO NOT share that file or commit it into Git or other
# source control.
# pylint: disable=no-name-in-module,wrong-import-order
try:
    from secrets import secrets
except ImportError:
    print("WiFi secrets are kept in secrets.py, please add them there!")
    raise

# Set your Adafruit IO Username and Key in secrets.py
# (visit io.adafruit.com if you need to create an account,
# or if you need your Adafruit IO key.)
aio_username = secrets["aio_username"]
aio_key = secrets["aio_key"]

print("Connecting to %s" % secrets["ssid"])
wifi.radio.connect(secrets["ssid"], secrets["password"])
print("Connected to %s!" % secrets["ssid"])

### Topic Setup ###

# MQTT Topic
# Use this topic if you'd like to connect to a standard MQTT broker
mqtt_topic = "test/topic"

# Adafruit IO-style Topic
# Use this topic if you'd like to connect to io.adafruit.com
# mqtt_topic = secrets["aio_username"] + '/feeds/temperature'

### Code ###
# Define callback methods which are called when events occur
# pylint: disable=unused-argument, redefined-outer-name
def connect(mqtt_client, userdata, flags, rc):
    # This function will be called when the mqtt_client is connected
    # successfully to the broker.
    print("Connected to MQTT Broker!")
    print("Flags: {0}\n RC: {1}".format(flags, rc))


def disconnect(mqtt_client, userdata, rc):
    # This method is called when the mqtt_client disconnects
    # from the broker.
    print("Disconnected from MQTT Broker!")


def subscribe(mqtt_client, userdata, topic, granted_qos):
    # This method is called when the mqtt_client subscribes to a new feed.
    print("Subscribed to {0} with QOS level {1}".format(topic, granted_qos))


def unsubscribe(mqtt_client, userdata, topic, pid):
    # This method is called when the mqtt_client unsubscribes from a feed.
    print("Unsubscribed from {0} with PID {1}".format(topic, pid))


def publish(mqtt_client, userdata, topic, pid):
    # This method is called when the mqtt_client publishes data to a feed.
    print("Published to {0} with PID {1}".format(topic, pid))


def message(client, topic, message):
    # Method called when a client's subscribed feed has a new value.
    print("New message on topic {0}: {1}".format(topic, message))


# Create a socket pool
pool = socketpool.SocketPool(wifi.radio)

# Set up a MiniMQTT Client
mqtt_client = MQTT.MQTT(
    broker=secrets["broker"],
    port=secrets["port"],
    username=secrets["aio_username"],
    password=secrets["aio_key"],
    socket_pool=pool,
    ssl_context=ssl.create_default_context(),
)

# Connect callback handlers to mqtt_client
mqtt_client.on_connect = connect
mqtt_client.on_disconnect = disconnect
mqtt_client.on_subscribe = subscribe
mqtt_client.on_unsubscribe = unsubscribe
mqtt_client.on_publish = publish
mqtt_client.on_message = message

print("Attempting to connect to %s" % mqtt_client.broker)
mqtt_client.connect()

print("Subscribing to %s" % mqtt_topic)
mqtt_client.subscribe(mqtt_topic)

print("Publishing to %s" % mqtt_topic)
mqtt_client.publish(mqtt_topic, "Hello Broker!")

print("Unsubscribing from %s" % mqtt_topic)
mqtt_client.unsubscribe(mqtt_topic)

print("Disconnecting from %s" % mqtt_client.broker)
mqtt_client.disconnect()