LoRaWAN
A low-power, long-range wireless protocol for connecting battery-operated sensors to the internet, used in smart-city and agricultural IoT deployments.
LoRaWAN is the networking layer that makes large-scale IoT economical. Devices run on coin-cell batteries for years, transmit small payloads (a few hundred bytes), and reach gateways kilometers away. The trade-offs: low bandwidth, infrequent updates, and a non-trivial deployment phase to get gateway coverage right.
The applications we have shipped include smart-city sensor networks (parking, environment, waste), agricultural monitoring, and industrial telemetry. The pattern is the same in all of them: cheap, dumb sensors at the edge; gateways aggregating to a network server; the network server forwarding to your application backend.
Worked example of where the budget actually goes, and the mistake founders make: they price the sensors and forget the coverage. A farm or a city district needs gateways positioned so that every sensor reaches at least one, and getting that wrong means dead zones, retransmissions, and batteries that drain in months instead of years. On a real deployment the site survey and gateway placement is often the harder half of the project, well after the per-unit sensor cost has been signed off. Walls, terrain, and metal silos all eat range, and you only find out by measuring on site.
The other decision founders rush is who owns the network. With LoRaWAN you typically run your own gateways, which means no per-device cellular bill but a real responsibility: you operate the gateways, the network server, and the coverage. The cellular alternatives (NB-IoT, LTE-M) flip that, the carrier owns coverage everywhere they reach, and you pay a per-device data plan in exchange. For a dense, fixed deployment you control (a campus, a farm, a city district), owning the network usually wins on cost over the device lifetime. For a low device count spread unpredictably across regions, paying the carrier is cheaper than building coverage you will barely use.
The honest trade-off: LoRaWAN trades bandwidth and latency for range and battery life, and that trade is non-negotiable, not tunable. It is the right tool when you need many sensors over a wide area with multi-year battery life and you only send a few bytes now and then. It is the wrong tool when you need high bandwidth, low latency, or per-device connectivity that follows the device around; for those, 5G NB-IoT or LTE-M is usually the better fit. Decide which axis your product actually lives on before committing to the radio.