MQTT Integration

Select or set up an MQTT broker

• Could be hosted cloud broker or on‑premises server.

• Ensure supports TLS if you need secure communication.

• Example: topics, QoS settings, authentication.

Define topics & publication/subscription scheme

• Define topic hierarchy (e.g., device/<deviceId>/telemetry, device/<deviceId>/command).

• Decide which data you’ll publish, and which topics you’ll subscribe to for commands/config.

• Use wildcards (+, #) if needed for flexible subscription.

• Embed or configure MQTT client in device/software

• Use lightweight client libraries, ensure minimal footprint.

• Implement publishing of telemetry data, and subscription for commands.

Secure the connection

• Use TLS/SSL (MQTT over port 8883) or secure WebSockets if needed.

• Implement authentication (client IDs, credentials) and possibly certificate‑based auth.

Implement QoS, sessions and reliability strategy

• Choose the appropriate QoS (e.g., telemetry might be QoS 0 or 1; commands might require QoS 2).

• Leverage retained messages or “Last Will & Testament” features for device disconnect handling.

Data processing, integration & analytics

• On the backend, subscribe to topics, process incoming data, trigger alerts/logic.

• Devices may receive downlink messages or RPC (remote procedure call) via topics.

• Use data logs for analytics, digital twin models, etc