MQTT Publisher-Subscriber Setup

Learning objectives

• Explain MQTT broker, publisher, and subscriber roles
• Run browser-based MQTT simulator workflows
• Implement an MQTT publisher with paho-mqtt
• Implement an MQTT subscriber with alert logic
• Choose a simulator or hardware MQTT learning path

Knowledge checks · 4

1. In an MQTT-based temperature monitoring system, an ESP32 sensor node reads temperature… ikc-1cln1c0
2. Using this chapter's broker CPU-load formula (CPU% ~ 0.01 x R_out + 0.005 x N_conn),… ikc-fmuatm
3. This chapter's 'Common Mistake' warning lists four dangers of using test.mosquitto.org… ikc-2ehwhd
4. Per this chapter's Deep-Dive Note, what does the broker do if it receives no control… ikc-1pxfwmx

Placed labs · 1

• Publish temperature on a unique MQTT topic · 75 min