The Internet of Things (IoT) is the network of physical devices, such as sensors, meters, cameras, vehicles and machines, that connect to the internet or a private network to send data or take commands. The point is to measure and control things that used to need a person on site: a freezer’s temperature, a pump’s vibration, a truck’s location, or whether a door is open.
At a glance
- IoT devices sense something (temperature, motion, location, power use) or control something (a valve, a lock, a thermostat), and connect to a network to do it.
- Devices connect over Wi-Fi, Ethernet, Bluetooth, cellular, LoRaWAN or other networks, chosen by range, power and data needs.
- Data usually flows to a cloud or on-site platform that stores it, shows dashboards and triggers alerts or actions.
- Security is the biggest buyer concern: many devices are hard to patch and easy to forget.
- Connectivity, device management and data costs add up as device counts grow.
What problem it solves
Many business processes depend on information that is slow or expensive to collect. Staff walk the floor to read gauges, drive to remote sites to check equipment, or learn about a failure when a customer complains. Assets get lost, energy is wasted in empty rooms, and maintenance happens on a fixed schedule whether it’s needed or not.
IoT replaces manual checks with continuous data. A sensor reports a cooler warming before the stock spoils, a meter reports usage without a site visit, and a tracker shows where a vehicle or pallet is. That data can trigger an alert, a work order or an automatic action, and over time it shows patterns that support decisions such as predictive maintenance or reducing space and energy use.
How it works
An IoT system has four layers.
Devices. Sensors and actuators with just enough computing power to take readings and communicate. Many run on batteries for years, which limits how much data they send and how often.
Connectivity. Devices inside a building often use Wi-Fi, Ethernet or short-range radio such as Bluetooth or Zigbee, sometimes through a gateway. Devices on the move or at remote sites often use cellular, including low-power options such as LTE-M and NB-IoT where carriers offer them. LoRaWAN and similar low-power wide-area networks suit small amounts of data over long distances. Cellular IoT is usually billed through data plans or pooled IoT plans, which need their own management.
Platform. Data flows to a cloud service or an on-site system that stores it, manages devices (provisioning, updates, health) and applies rules. Some processing happens close to the devices, an approach known as edge computing, to cut latency or bandwidth.
Applications. Dashboards, alerts, integrations with maintenance, building or ERP systems, and analytics turn data into action.
Security across all layers. Each device is a networked computer that needs an owner, unique credentials, updates and a place on a segmented network. See IoT security and our article on cloud security in the IoT age for more.
When it matters for buyers
- When devices are already arriving. Cameras, building controls, badge readers and smart TVs are IoT, whether or not anyone calls them that, and need to be inventoried and segmented.
- When you’re planning a network refresh. Wi-Fi, switching and power over Ethernet capacity should account for device counts.
- When remote or mobile assets matter. Vehicles, trailers, kiosks and remote sites usually need cellular connectivity and a plan to manage it.
- When cyber insurance or audits ask about unmanaged devices. IoT is a common gap.
- When a pilot is ready to scale. Costs and management effort that were trivial for 50 devices are not trivial for 5,000.
Smaller businesses can start small; our article on how IoT can transform small business operations and the whitepaper on IoT integration cover practical first steps, and our IoT solution page covers how to source it.
Questions to ask vendors
- What connectivity does the device use, and what happens to data if the connection drops?
- How are devices provisioned, updated and retired, and how long will you provide security updates?
- Can each device have unique credentials, and does it support our network segmentation and access control?
- Where is the data stored, who owns it, and can we export it?
- What does connectivity cost per device, and are plans pooled across devices?
- What is the battery life in real use, and how are batteries replaced at scale?
- Which systems does the platform integrate with, and through what APIs?
Problems this helps with
- Finding out about equipment failures only after they happen
- Sending staff to read meters or check sites by hand
- Hundreds of connected devices nobody inventories or patches
- Paying for cellular data plans on devices we can't track
