Use cases LoRaWAN: exam questions with worked answers

Questions for the "Use cases" topic

1. Q01

   Typical LoRaWAN smart-city use cases include: smart water meters, parking-bay occupancy sensors, fill-level sensors for waste bins, public-lighting telemonitoring, air-quality stations, EV charger monitoring (status and energy readings — not the OCPP charge-control protocol) and flood alerts — a typical LoRaWAN sensor costs between EUR 30 and EUR 150.

   TrueFalse

   7. Use cases· Smart City· Medium

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   Correct answer

   True

   Learning tip

   Representative price ranges for smart-city LoRaWAN devices: water meters (Veolia, Suez) at EUR 30-50 per unit; parking sensors (Smart Parking, Vinci Park) at EUR 80-150 per bay; waste-bin level sensors at EUR 50-100 per bin; public lighting often combined with D4i for monitoring and dimming; atmospheric-pollution stations at EUR 200-500 per station. Cities such as Paris, Lyon, Nantes and Bordeaux have significant LoRaWAN deployments across several of these verticals.

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2. Q02

   In building retrofits, LoRaWAN competes with EnOcean for energy sub-metering and wireless monitoring (temperature, CO2, presence): long range (one gateway covers a large building), 5-10 years of battery life on the sensors, but higher latency (Class A).

   TrueFalse

   7. Use cases· Gebäudemonitoring· Medium

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   Correct answer

   True

   Learning tip

   LoRaWAN typically reaches 500 m to 1 km indoors (so a single gateway can cover an entire large building), with a latency that effectively equals the uplink period — usually minutes for a Class A device. EnOcean only reaches 30-50 m indoors and therefore needs many gateways, but it offers second-level latency for instantaneous control. LoRaWAN is therefore preferred for monitoring use cases: retrofit sub-metering (10-100 meters per gateway), tertiary-sector monitoring for regulatory reporting (in France, the OPERAT platform under the Décret Tertiaire) and warehouse or factory logistics. EnOcean remains the better choice for instantaneous control (push-buttons, lighting commands).

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