LAN & Multi-Terminal Setup Guide

AVS Restaurant POS transforms your main cash register or host PC into a local LAN server. Waiters with mobile phones, cashier terminals, kitchen screens (KDS), and tablet customer displays can all connect simultaneously over your restaurant’s local Wi-Fi or Ethernet router.

No internet connection is required: even if your ISP goes down or mobile internet is cut, all terminals continue placing orders, generating KOTs, and printing invoices smoothly over the local network.

By default, Windows Defender Firewall blocks inbound traffic on newly opened ports. AVS Restaurant POS comes with an automated firewall configuration tool:

• Compulsory Starter Execution: The main launcher Launch-AVSPOS.bat automatically checks and verifies firewall rules on every boot.
• Allow-LAN-Access.bat: You can also double-click Allow-LAN-Access.bat in the root directory at any time to open ports 1995 (Web POS), 4001 (Backend API), and 4000.
• Auto-Elevation: The batch script automatically requests Administrator privileges if needed and applies the permanent rules to all network profiles (Private, Domain, Public).

When you launch the POS or run Allow-LAN-Access.bat, the terminal prints your computer’s current local IPv4 address (for example, 192.168.1.150 or 10.111.9.150).

# Manual check via PowerShell or Command Prompt:
ipconfig | findstr "IPv4"

Connect your secondary devices (laptops, Android tablets, iPads, or smartphones) to the same Wi-Fi router as the main PC. Then open any web browser (Chrome, Safari, Edge) and navigate to:

# Primary Cashier / Waiter Terminal
http://<MAIN_PC_IP>:1995/pos

# Kitchen Display System (KDS)
http://<MAIN_PC_IP>:1995/kds

# Live Customer Facing Display & Soundbox
http://<MAIN_PC_IP>:1995/customer-display

• Connection Timed Out? Ensure both devices are on the exact same Wi-Fi router (not mobile hotspot vs home router).
• Re-run Allow-LAN-Access.bat: If Windows performed a system update, permissions may have reset. Run Allow-LAN-Access.bat as Administrator once.
• Network Profile: In Windows Settings > Network, ensure your connection is set to “Private Network” rather than “Public”.