
📡 IoT · Flowchart
How a smart home reacts to events: motion, door and temperature triggers run rules for lights, locks, AC and alerts.
Drawing diagram…
Smart home flowchart: a sensor event arrives at the home hub (motion, door open, temperature). The hub checks the home mode. In Away mode, motion or door open triggers the siren, camera recording and a phone alert. In Night mode, motion turns on dim hallway lights. In Home mode, temperature above 27°C switches on the AC and door open at sunset turns on porch lights.
flowchart TD
A[Sensor event: motion, door, temperature] --> B[Home hub]
B --> C{Home mode}
C -->|Away| D{Motion or door open?}
D -->|Yes| E[Siren, record camera, alert phone]
C -->|Night| F{Motion?}
F -->|Yes| G[Dim hallway lights for 2 min]
C -->|Home| H{Temperature above 27°C?}
H -->|Yes| I[Turn on AC at 24°C]
C -->|Home| J{Door open after sunset?}
J -->|Yes| K[Porch lights on]How sensor readings travel from devices to dashboards and alerts: MQTT ingestion, stream processing, time-series storage and anomaly detection.
How a new device joins the platform securely: claiming by the owner, certificate issue and its first connection to the MQTT broker.
A general-purpose IoT platform: device connectivity, device management, data processing, rules and the apps built on top.
Where processing happens in an edge IoT setup: devices, an on-site edge server running containers, and the cloud for fleet management and long-term storage.
How MQTT messaging works between devices, a broker and applications: connect, subscribe, publish with QoS, retained messages and last will.
Every state an IoT device goes through, from manufacture to decommissioning, including updates, faults and replacement.