MQTT External Communication
==========================

Professional MQTT integration for lightweight pub/sub messaging.
Supports QoS 0, 1, 2 with TLS and authentication.

**Docstring:**

"""
MQTT External Communication

Professional MQTT integration for lightweight pub/sub messaging.
Supports QoS 0, 1, 2 with TLS and authentication.
"""

**Classes:**
- MqttClient
- MQTT_AVAILABLE