Software side for an IoT smart lock system. Includes a user-facing app and cloud server code.

Note: Server is already shut down due to costs — see documentation for full details.

How it works

LockSense is made up of three parts:

• Smart Lock – Detects its physical state and communicates via MQTT.

• Cloud Backend – Routes commands, updates status using Firebase, and handles push notifications.

• Mobile/Web App – Lets users lock/unlock, view status, and get real-time updates.

The system uses MQTT for lightweight messaging and Firebase for fast syncing between the lock and user. Built with Flutter and Node.js.