How Does Passive RFID Technology Enable the Internet of Things (IoT)? Part 1

By Jeffrey Polly, Vice President of Professional Services

1. The Internet of Things (IoT) has taken the technology world by storm, and it isn’t going to slow down anytime soon. IoT has the power to revolutionize supply chain visibility as we know it, ushering in a new era of data intelligence and accessibility.

   Simply put, IoT is a network of devices that allows data about each device to be accessed, collected, and exchanged — enabling complete, real-time visibility and control of any item that is connected to the Internet. Technologies like RFID technology play a crucial role in this ecosystem by allowing objects to be automatically identified and tracked, providing critical data that enhances IoT functionality.

   My question has always been: what is the definition of a “thing”? Most of us spend time on the Internet in some way, shape, or form. Our computers, smartphones, smart TVs, gaming systems, and appliances are attached and accessible to and from the Internet. These devices all have three things in common.

   They all have a power source, whether they are plugged into the wall (AC power) or relying on a battery.

2. They all have a communication method, whether it’s a wired Ethernet connection, a WiFi connection, or a cellular connection.
3. All devices are assigned an individual IP address that uniquely identifies each device on the Internet, making them visible and accessible.

With this understanding, I believe that today the “Internet of Things” is actually the “Internet of Devices.”

Yes, these devices are “things,” but so are tools, files, office furniture, pipelines, rail cars, and other valuable business assets that have no power source or communication means. So how can we make these other types of “things” visible to the Internet to make IoT truly possible? A well designed and properly deployed passive RFID system can make almost any type of “thing” (asset) visible to the Internet.

A passive RFID system consists of RFID tags/labels, RFID readers and antennas, RFID middleware, and in most cases, RFID printers. There are literally thousands of RFID tag types on the market today. RFID tags have evolved over the past decade. Sensitivity has increased along with read ranges. There are tags specifically designed for metal, liquid, paint, and just about any other material you can think of. They come in several different memory capacities and configurations, providing the ability to uniquely identify each tag. Suffice it to say there is an RFID tag available for practically every type of “thing” in our world today. For organizations integrating RFID technology into their operations, combining it with mobile device management solutions can streamline data collection, enhance security, and improve overall asset management efficiency.

Passive RFID readers have a power source — usually AC Power, Power over Ethernet (PoE), or battery. They also have data communication capabilities such as Ethernet, WiFi, or cellular, and they can be assigned an IP address. So by earlier definition, passive RFID readers can join the “Internet of Devices.”

UHF passive rfid tags are sensors that operate by way of the radio frequency power radiated from antennas attached to RFID readers. RFID tags communicate with RFID readers using the radio frequency waves transmitted to them. And although you cannot practically assign an IP address to a UHF passive RFID tag, the tags are encoded (programmed) with an ID that uniquely identifies it to a particular business or organization. With this understanding, you can begin to understand how placing UHF passive RFID tags on inanimate objects, or ‘things,’ allows these assets to become visible to the Internet, further enabling the vision of the ‘Internet of Things.

A vital component to a passive RFID system is the RFID middleware. This critical software component is used to configure and control the RFID readers. It receives and processes RFID tag data from the readers and communicates RFID tag events to business systems such as ERP, MRP, and/or WMS. To summarize, the RFID middleware makes RFID tags visible to the business systems, and the business systems make the RFID tags visible to the Internet.

You can now see how passive RFID technology truly enables the Internet of Things. Check out Part II of “How Does Passive RFID Technology Enable the Internet of Things?” where we will further explore how to use the technology to develop transactions and business events about the “things” that are important to your business.

Expanding the Value of Passive RFID Across Operations

For most organizations, passive RFID started as a simple tracking tool. Today, it’s become something much more central to how modern operations actually run, connecting assets, inventory, equipment, and workflows in ways that give teams real visibility and room to make smarter calls.

The difference from older tracking methods is significant. Manual scanning and data entry put the burden on people to keep information current. RFID shifts that burden off your team, so they can spend less time hunting down assets or correcting records and more time on work that actually moves the business forward.

Improving Operational Visibility

The most immediate benefit most organizations notice is visibility, real, continuous awareness of what’s happening across facilities and supply chains.

With RFID, teams can monitor:

• Inventory movement between locations
• Equipment usage and availability
• Tool checkout and return activity
• Shipment staging and loading accuracy
• Asset dwell times within facilities
• High-value asset movement across departments

Place readers strategically throughout a warehouse, production floor, distribution center, or healthcare facility, and you get asset intelligence flowing in real time, without anyone having to stop and scan something.

That visibility directly cuts down on:

• Lost or misplaced assets
• Manual inventory reconciliation
• Time wasted searching for critical equipment
• Delays from inaccurate data
• Operational blind spots

Strengthening Inventory Accuracy

Inventory problems rarely announce themselves until the damage is already done, a stock shortage, a delayed shipment, a count that doesn’t match reality. Most of those problems trace back to disconnected or manual tracking processes.

RFID addresses this at the source by automating how data gets collected. The practical benefits include:

• Faster inventory counts
• More efficient cycle counting
• Automated stock verification
• Fewer human errors
• Real-time inventory updates
• More reliable forecasting

Audits that used to take hours with barcode scanners now happen in a fraction of the time, and the accuracy holds up even across multiple facilities.

Supporting Smarter Warehouse Operations

Warehouses today don’t have the luxury of slowing down to stay accurate. RFID helps teams move faster without sacrificing precision.

In practice, that looks like:

• Automated receiving processes
• Real-time pallet and case tracking
• Shipment verification
• Dock door monitoring
• Inventory location tracking
• Order fulfillment validation

Less manual handling means teams can process higher volumes without the usual margin for error creeping in. And as operations grow, RFID scales with them; multi-site visibility becomes manageable rather than chaotic.

Enhancing Asset Utilization

Most organizations have invested more in physical assets than they realize, such as tools, mobile equipment, containers, and operational gear. The problem is rarely ownership. It’s visibility. Without knowing where things are or how they’re being used, it’s hard to manage them well.

RFID gives that visibility back. Teams can:

• Monitor how and where assets move
• Spot equipment that’s sitting idle
• Avoid unnecessary purchases
• Improve availability for the people who need it
• Track maintenance-related activity
• Cut replacement costs tied to loss or misplacement

Better asset intelligence leads to better financial decisions and more value from what you already own.

Enabling More Intelligent Business Processes

Tracking items is useful. What becomes genuinely powerful is when RFID data connects to the broader systems running your business, ERP, WMS, and asset management platforms, and starts triggering real workflows automatically.

That can mean:

• Inventory records update on their own
• Replenishment alerts firing at the right moment
• Shipment accuracy is getting verified without manual checks
• Asset movement history logging itself
• Compliance documentation staying current
• Maintenance workflows kick off when needed

The administrative load drops. Consistency improves. Teams respond faster because the system is already working alongside them.

Creating a Foundation for Future Innovation

Organizations investing in RFID today are also building the infrastructure for what comes next. As IoT strategies mature, RFID slots in naturally as a scalable layer within a broader connected environment.

Paired with technologies like:

• IoT sensors
• GPS tracking
• Bluetooth Low Energy (BLE)
• Cloud-based analytics
• Predictive maintenance platforms

RFID becomes part of a connected ecosystem rather than a standalone tool. Organizations can move from simply tracking assets to understanding usage trends, anticipating disruptions, and continuously improving how operations run.

The Business Impact of Passive RFID

When it’s implemented well, passive RFID produces results you can actually measure.

Organizations typically see:

• Higher inventory accuracy
• Lower labor costs
• Faster workflows
• Stronger asset accountability
• Less downtime
• Better supply chain visibility
• Improved customer service
• More confident business decisions

As connected operations become the standard rather than the exception, passive RFID stands out as one of the more practical paths to bridging the physical and digital sides of a business. It makes everyday assets visible, traceable, and useful in ways they simply weren’t before, and that foundation matters for wherever operations need to go next.

Also read – The Lean Process You May Be Missing: Smart Printers