Smart Home Control Bridge

Outcomes

Context

Smart home value appears when devices enter the user’s automation graph — not only a vendor app.

Challenge

Consumer IoT clouds expose control APIs that do not map cleanly to open home automation. Users and integrators needed a reliable bridge for login, device discovery, command/control, and realtime state — including Home Assistant entities.

Approach

We engineered a Node REST API with MQTT and WebSocket heartbeats for durable control sessions, SQLite-backed local state where useful, Docker packaging for the control plane, and a Home Assistant custom component with config flow, multi-entity discovery, and MQTT realtime updates.

Architecture

Express REST API, MQTT device channel, WebSocket client sessions, SQLite, Dockerized frontend/API, Home Assistant custom integration via HACS-style install path.

Scope

• —Auth and device listing
• —Command/control APIs
• —MQTT realtime
• —WebSocket sessions
• —Home Assistant integration

Constraints

• —Vendor cloud API volatility
• —Proxy idle disconnects on WS
• —Multi-channel device modeling

Solution highlights

• —WebSocket heartbeats to prevent abnormal closures
• —Multi-channel devices exposed as separate entities
• —Config-flow HA setup instead of brittle YAML-only installs

Technologies

Results

• —Unified control API for cloud-backed smart devices
• —Realtime state path that survives proxy idle timeouts
• —Home Assistant entities for lights, switches, covers, locks, sensors, climate
• —Docker delivery for repeatable local/prod control stacks

Lessons learned

• —Consumer IoT bridges fail on idle timeouts before they fail on auth.
• —Entity modeling is the product — not just “turn light on.”
• —Debug services (device dump, MQTT stream) save support weeks.