MQTT Protocol: Complete Guide for IoT Developers

What is MQTT?

MQTT is a lightweight publish-subscribe messaging protocol for IoT.

MQTT Architecture

Understand brokers, publishers, and subscribers.

Setting Up MQTT Broker

Install Mosquitto or use cloud MQTT brokers like HiveMQ.

ESP32 MQTT Implementation

Program ESP32 to publish and subscribe to MQTT topics.

Security Best Practices

Implement authentication, authorization, and TLS encryption.