Real-Time Inventory Tracking with IoT & WebSockets

Traditional inventory systems update once a day - or worse, once a week via manual counts. Modern warehouses need real-time visibility. Here's how we build it.

The Problem With Batch Updates

When inventory data is stale:

• Overselling - selling products you don't actually have in stock
• Misallocation - sending pickers to empty bins
• Inaccurate reporting - decisions based on yesterday's data
• Customer disappointment - "in stock" items that aren't

Event-Driven Inventory Architecture

Every inventory change is an event:

• `ITEM_RECEIVED` - goods arrive at receiving dock
• `ITEM_PUTAWAY` - item placed in storage location
• `ITEM_PICKED` - item removed from storage for an order
• `ITEM_PACKED` - item packed into shipping container
• `ITEM_SHIPPED` - item leaves the warehouse
• `ITEM_RETURNED` - item comes back
• `ITEM_ADJUSTED` - manual inventory correction

IoT Integration

Barcode Scanners

• Zebra TC21/TC26 - rugged Android devices with built-in scanners
• Web-based scanning - camera-based scanning via Progressive Web App
• Bluetooth scanners - pair with tablets for flexible setups

RFID

For high-volume operations:

• Fixed readers at dock doors - automatic receiving and shipping
• Handheld readers - bulk cycle counting (scan entire aisle in minutes)

WebSocket Architecture

Server

• Node.js + Socket.IO - handles 1000+ concurrent connections
• Redis Pub/Sub - distributes events across multiple server instances
• Room-based broadcasting - each warehouse zone is a "room"

Performance & Scale

Need real-time inventory tracking? Let's architect it together.