LoRa / LoRaWAN

LoRa

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LoRa (Long Range) is a proprietary wireless communication technology designed for long-range connectivity with very low power consumption. It is mainly used in IoT (Internet of Things) applications. LoRa is based on a spread-spectrum technique using Chirp Spread Spectrum (CSS) modulation.

Features

Long range: Up to 15 km in rural areas, 2–5 km in urban areas
Low power consumption: Devices can operate for years on a single battery
Low data rate: Typically 0.3–50 kbit/s
Robust to interference: CSS modulation ensures reliable communication even in noisy environments

LoRaWAN

LoRaWAN (Long Range Wide Area Network) is a network protocol built on top of LoRa that manages communication between LoRa end devices and gateways. It defines the MAC layer protocol and system architecture for a secure and scalable IoT network.

Architecture

LoRaWAN networks consist of three main components:

End devices: Sensors or actuators that collect data or perform actions
Gateways: Receive radio signals from end devices and forward them to the network server
Network servers: Manage the network and route messages to application servers

Device Classes

LoRaWAN defines three classes of end devices:

Class A: Energy-efficient, bidirectional; the device can only receive downlink messages immediately after an uplink transmission
Class B: Scheduled receive windows allow regular downlink messages
Class C: Almost always listening, higher power consumption

Security

End-to-end encryption: AES-128 encryption for messages between the end device and the application server
Network key: Authentication and integrity at the network level
Application key: Protection of application payloads

Applications

LoRa and LoRaWAN are mainly used in:

Smart cities (e.g., street lighting, waste management)
Agriculture (e.g., soil moisture, livestock monitoring)
Industry 4.0 (e.g., machine monitoring)
Asset tracking (e.g., logistics, transportation)