How to Build an RFID Asset Tracking System

Posted by Neeraj Purbia May 17, 2025, 12:46 pm


What is an RFID asset tracking system?

An RFID asset tracking system is a technology-based solution used to monitor the location, status, and movement of physical assets using RFID tags and readers. Unlike barcodes, RFID tags don’t require line-of-sight scanning. This makes asset management faster, more accurate, and more efficient.


Key Functions of RFID Asset Tracking

Key Functions of RFID Asset Tracking

  • Automatic identification of tagged items
  • Real-time location tracking
  • Audit trail for asset movement
  • Alerts for unauthorized movement or loss
  • Integration with enterprise systems like ERP or WMS
RFID

Core Components of an RFID Asset Tracking System

These are small electronic devices attached to assets. They consist of a microchip and an antenna and can be classified as:

  • Passive Tags: No battery; activated by reader signal. Ideal for cost-effective, short-to-mid range tracking.

These devices transmit signals to tags and receive tag responses.

  • Handheld Readers: Portable, used for manual scanning or audits.
  • Fixed Readers: Mounted in specific locations like doorways or production lines for automatic tracking.
  • Integrated Readers: Include antennas, processors, and connectivity in one compact unit.

RFID Antennas emit RF signals and receive tag responses. The number and placement of antennas affect read range and accuracy.

Middleware & Software

Middleware filters and processes raw RFID data, while the software provides interfaces for asset visibility, reporting, and integration.

Networking & Power

To ensure connectivity between readers and systems, a reliable network (wired or wireless) and a stable power supply are essential.

Planning the RFID Asset Tracking System

Define Business Objectives

Start by identifying why you need RFID. Common goals include:

  • Real-time visibility of assets
  • Reducing loss and theft
  • Automating asset audits
  • Compliance with regulations

Perform Asset Audit

List all the assets you want to track: equipment, tools, pallets, IT assets, etc. Note their material type, location, and mobility.

Identify Tracking Locations

Map the facility to determine where assets are stored, moved, or used. Consider:

  • Entry/exit points
  • Storage areas
  • Operational zones
  • Transition points

Assess Environmental Factors

Metal surfaces, liquids, and interference can affect RFID performance. Choose tags and readers suited to the operating environment.

Choosing the Right RFID Hardware

Selecting RFID Tags

Consider:

  • Form Factor: Label, card, hard tag
  • Mounting Type: Adhesive, screw, strap
  • Durability: Temperature, water, impact resistance
  • Memory: Read-only vs. read-write
  • Range Requirements: Passive for <20 ft, active for >100 ft depend upon the read environment.

Popular brands: Zebra, Confidex, TagMatiks

Choosing RFID Readers

  • Handheld: Ideal for periodic audits. Example: Zebra RFD40, Impinj R700 with mobile sled.
  • Fixed: Continuous tracking. Choose based on the number of ports, range, and protocols supported.
  • Integrated: Easier setup, used for zones with fewer devices.

Antenna Selection

Directional vs. omnidirectional antennas: the number depends on the area size and read zones.

Designing the System Architecture

System Design Considerations

  • Read Zones: Define where and when assets will be read.
  • Data Flow: Determine how data moves from tags to software.
  • Integration Points: Identify if data should feed into ERP, inventory, or security systems.

Infrastructure Layout

Create a floor plan showing:

  • Tag placement
  • Reader and antenna positions
  • Network and power connections
RFID Asset Tracking

Implementing the RFID Asset Tracking System

Tagging Assets

  • Clean the asset surface before applying RFID tags
  • Use epoxy or rivets for rugged environments
  • Associate the tag ID with asset metadata in the system

Installing Hardware

  • Mount antennas at optimal height and angle
  • Test read ranges to avoid dead zones
  • Secure cabling and power supplies

Configuring Readers

  • Set power levels and read intervals
  • Define filtering logic to reduce duplicate reads
  • Enable data encryption if required

Setting Up Software

Choose between:

  • On-Premise RFID Software: Better control, used in regulated industries.
  • Cloud-Based RFID Software: Easier deployment, remote access, automatic updates.

Middleware Setup

Middleware processes raw tag reads and passes useful data to applications. Functions include:

  • Event filtering
  • Time stamping
  • Location calculation
  • Duplicate removal

Integration with Other Systems

ERP and Inventory