§01SPEC · CHOOSING-CONNECTIVITY-FOR-IOT-DEVICES
Choosing connectivity for IoT devices
Connectivity shapes battery life, range, cost and reliability for every Internet of Things project. Wi-Fi offers high bandwidth where networks exist but consumes more power. Bluetooth Low Energy suits short-range devices that connect through phones or gateways, such as wearables and sensors in a single room.
Low-power wide-area networks such as LoRaWAN cover large areas with very low power use, suiting agriculture, utilities and campuses where devices send small readings infrequently. Cellular options like NB-IoT and LTE-M provide wide coverage through mobile networks, useful for assets spread across cities or regions.
Industrial environments often add wired protocols such as Modbus or OPC UA, connecting machines and controllers to gateways that translate data for cloud platforms. Many projects combine several technologies depending on device location and data needs. Test connectivity in real locations early. Metal structures, underground spaces and rural areas can disrupt signals in ways that office testing never reveals, and discovering this after manufacturing devices is costly.


