DrLume

Next.js project (App Router, TypeScript) with voice and 1:1 video call (WebRTC + Socket.IO).

npm install

Emotion from camera (optional): Set GEMINI_API_KEY in .env.local; emotion uses the Gemini vision API (see .env.example).

npm run dev

This starts the custom server (Next.js + Socket.IO signaling) on http://localhost:3000. The app and the signaling server run on the same port.

• Video call page: http://localhost:3000/video

• npm run dev – dev server (Next.js + Socket.IO)
• npm run build – production build
• npm run start – run production server (run npm run build first)
• npm run lint – run ESLint

Two users can join the same room code and see each other’s live camera and hear audio. No external video SDKs; uses raw WebRTC and Socket.IO for signaling.

1. Same network (e.g. laptop + phone on same Wi‑Fi)

   • On both devices, open http://<your-pc-ip>:3000/video (replace with your computer’s local IP).
   • Enter the same room code (e.g. room1) and click Join room on both.
   • On the device that sees “You are caller”, click Start call.
   • You should see and hear each other.

2. Different networks (e.g. phone on cellular, laptop at home)

   • You need a TURN server so peers can connect through NAT/firewalls.

   • Set these env vars (create a .env.local next to package.json):

     NEXT_PUBLIC_TURN_URL=turn:your-turn-server:3478
     NEXT_PUBLIC_TURN_USERNAME=your-username
     NEXT_PUBLIC_TURN_CREDENTIAL=your-password

   • Restart npm run dev, then open the app from both devices (e.g. deploy to a public URL or use a tunnel like ngrok for the laptop, and open that URL on the phone).

   • Same steps: same room code → Join → Start call (on caller device).

• STUN (default): Google’s public STUN server is used so peers on the same or friendly networks can discover their public IP and connect.
• TURN: If you set NEXT_PUBLIC_TURN_URL, NEXT_PUBLIC_TURN_USERNAME, and NEXT_PUBLIC_TURN_CREDENTIAL, the app will add that TURN server to the ICE config. Use TURN when devices are on different networks (e.g. different Wi‑Fi or mobile data) and direct connection fails.