MQTT

Motivation

MQTT matters because it gives teams a shared way to reason about a lightweight publish/subscribe messaging protocol commonly used by IoT devices.

Where it fits

MQTT belongs to the product track and the Iot Systems layer. It is useful when teams need to connect design decisions to practical engineering work.

Mental model

Think of MQTT as a named pattern in the engineering map: it explains what problem is being solved, what boundaries are involved, and what tradeoffs appear when systems grow.

Common mistakes

• Treating the term as a buzzword instead of tying it to concrete behavior.
• Ignoring the operational, security, or product constraints around it.
• Learning the definition without knowing where it appears in real systems.