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How do IoT systems work? Four layers from sensor to decision

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The Internet of Things often brings to mind a small sensor stuck on a machine. But the sensor is only the first link. An IoT system that really helps a business has four layers.

1. Sensing: collecting data at the source

Temperature, humidity, energy use, vibration, liquid level or location are measured by sensors. Choosing the right sensor matters as much as placing it where it truly represents what you want to measure.

2. Connectivity: moving the data

Strong Wi-Fi or mobile signal isn't everywhere. In warehouses, field sites or basements, long-range low-power wireless such as LoRa is often the choice, and devices are designed to run for long periods on battery or small solar panels.

3. Processing: making data meaningful

Data collected in the cloud is cleaned, compared with history and checked against thresholds. Once enough data has built up, AI models can be added for failure or consumption forecasts.

4. Decision: reaching the right person

The most valuable data reaches the right person at the right moment. A dashboard or mobile app shows plain alerts such as "Cold room 2 has been above its threshold for 30 minutes", and a relay or control board can act on that decision automatically.

What a business gains

  • Fewer losses: cold-chain breaks, leaks and faults are caught early.
  • Energy savings: you see which equipment uses how much, and when.
  • Planned maintenance: service based on measurement, before things break.
  • Records: every reading can be traced back later.

When each layer comes from a different vendor, mismatches are common. At Orellian we develop the layers together, from sensor hardware to the mobile app. See our IoT solutions or tell us about your project.

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