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# Publisher function for temperature
def publish_temperature_data(client):
    while True:
        temperature = random.uniform(18.0, 30.0)  # Simulate temperature in Celsius
        message = f"{temperature:.2f}"
        client.publish(temperature_topic, message)
        print(f"Published Temperature: {message} °C")
        time.sleep(5)  # Publish every 5 seconds