A fair turn at every lab PC.

Client

At each workstation

01

Installed on every lab PC. It keeps Windows locked between sessions and opens the desktop only after the server accepts the student's token.

• Locks the keyboard, shell, and window focus
• Keeps the session timer and reports status
• Accepts remote lock, unlock, and logout commands
• Reports software use and screen captures
• Guides workstation setup and recovery

Kiosk

At the lab entrance

02

Students check in here. The kiosk verifies their record, assigns an eligible workstation, and issues a token that works once.

• Reads a QR code or accepts a student ID
• Handles reservations and walk-in assignment
• Issues one-time access tokens
• Shows current occupancy and available PCs

Manager

For ICT staff

03

ICT staff use the Manager to see the room, control sessions, manage student access, and run the bundled server when the lab operates locally.

• Shows a live floor plan and workstation status
• Sends unlock, logout, and room-wide notices
• Validates students and manages quotas or bans
• Exports analytics and detailed session history
• Connects to a local sidecar or remote server

Server

The room's authority

04

The Rust server decides who may use a workstation and for how long. Every app reports to it, so active sessions have one authoritative record.

• Routes live state and commands over WebSocket
• Checks sessions every 60 seconds and statistics every 10
• Answers UDP discovery on the lab network
• Repairs orphaned sessions after a power loss
• Keeps lab records in encrypted local SQLite storage