Table of Contents
Main PC
The Main PC is the central computer of every Wonder Controlz installation. It hosts Node-RED (game logic), software products like er-audio, and serves as the single point of management for the entire room.
Role in the System
- Runs Node-RED — all game logic, automation, and the Game Master Panel
- Communicates with I/O modules over CAN bus (er-01-rev-a, er-rfid)
- Communicates with lighting and video devices over Ethernet/LAN
- Connects to the VPN for remote service access
Following the Zero Field Logic principle, the Main PC is the only device in the room that contains game logic. All other devices are passive — they execute commands and report events.
Hardware
We use BeeLink mini-PCs — compact, fanless (or near-silent), energy-efficient computers that fit easily behind scenography or in a technical cabinet.
| Parameter | Value |
|---|---|
| Form factor | Compact mini-PC |
| Operating system | Linux (Debian 12) |
| Connectivity | Ethernet (LAN), USB ports for CAN adapter and audio interfaces |
| Power | Low power consumption, 12V or 19V DC input |
The BeeLink platform is chosen for its reliability, availability, and ease of replacement. If a Main PC fails, a new unit can be configured and deployed quickly — the game logic is stored as a Node-RED flow export and can be restored in minutes.
Software Stack
- Node-RED — visual programming environment, game logic, Game Master Panel
- er-audio — multi-channel audio (optional, can also run on a separate machine)
- Wonder Controlz Node-RED nodes — custom palette for controlling all ecosystem products
- CAN interface — connects to the CAN bus for I/O module communication