Check if both services are running:

• Signaling server should be running on port 3001
• Next.js app should be running on port 3000
• Run: npm run dev:full

• Make sure all devices are on the same WiFi network
• Check firewall settings - port 3001 needs to be accessible
• Try refreshing the browser page
• Ensure the signaling server is accessible: http://[HOST-IP]:3001

• WebRTC connection may be blocked by network/firewall
• Try with smaller files first (under 10MB)
• Check if browser supports WebRTC (Chrome/Firefox recommended)
• Ensure both devices accept the file transfer request

For other devices to access the app:

• Find your IP address: ifconfig (Mac/Linux) or ipconfig (Windows)
• Access from other devices using: http://[YOUR-IP]:3000
• Example: http://192.168.1.100:3000

Recommended browsers:

• ✅ Chrome/Chromium (best support)
• ✅ Firefox
• ✅ Edge
• ⚠️ Safari (limited WebRTC support)

To test if everything is working:

1. Open the app in two browser tabs
2. Set different device names in each tab
3. Try sending a small file between the tabs
4. If this works, the issue is likely network-related