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Connect

The Connect page manages the live bridge between DEJA Cloud and your hardware. When your DEJA Server is running and a device is registered, you can connect, disconnect, and monitor the link from here.

Cloud dashboard with device connections

How Connection Works

DEJA Cloud communicates with your hardware through the DEJA Server:

  1. DEJA Cloud → Firebase Realtime Database (commands)
  2. DEJA Server picks up commands → sends via serial USB to your hardware
  3. Hardware responds → Server pushes status back through WebSocket + Firebase

The Connect page lets you manage step 1 — selecting which device to talk to and verifying the connection is healthy.

Connecting a Device

From the dashboard or Connect page:

  1. Select a registered device from the device list.
  2. Choose the serial port (auto-detected from available USB ports).
  3. Click Connect — the status indicator turns green when the link is established.

Connection Status

Each connected device shows:

  • 🟢 Connected -- Device is online and responding.
  • 🔴 Disconnected -- Device is not reachable. Check USB cable and server status.
  • 🟡 Reconnecting -- Automatic reconnect in progress after a connection drop.

Troubleshooting

  • No ports available -- Make sure your CommandStation is plugged in via USB and the DEJA Server is running. Click Refresh Ports to re-scan.
  • Connection drops -- Check USB cable quality. The server will auto-reconnect on brief interruptions.
  • Multiple devices -- Each device connects independently. You can have a DCC-EX CommandStation and IO boards connected simultaneously.

Related Pages

  • Devices -- Register and configure hardware devices.
  • Dashboard -- Quick-connect from the home screen.
  • DCC-EX Console -- Send commands once connected.