import logging

def on_connect(client, userdata, flags, reason_code, properties=None):
    logging.info("Connected to MQTT broker.")

def on_message(client, userdata, message, properties=None):
    logging.info(f"(Received message {message.payload} on topic '{message.topic}' with QoS {message.qos}")

def on_subscribe(client, userdata, mid, qos, properties=None):
    logging.info(f"Subscribed with QoS {qos}")