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![Overview of LoRaWAN communication and breakdown of LoRadar (Version 1)](https://drive.google.com/uc?export=view&id=1_DZtQ1pf7xVO5VPIY57kWERC9kML--kG)
![Overview of LoRaWAN communication and breakdown of LoRadar (Version 1)](https://drive.google.com/uc?export=view&id=1dRjqzCVLUKTCDUUo-21DoLjALqH2dRrb)
![Overview of LoRaWAN communication and breakdown of LoRadar (Version 1)](https://drive.google.com/uc?export=view&id=1lEeb3PsEt0KPR1qc5CjvcFaS846hATWO)
## Introduction
LoRa is the physical layer access technology that employs a variant of the chirp spreadspectrum modulation, allowing low powered transmission of small data rates (0.3 kbps to 50 kbps) over a long distances (up to 15 km in suburban and 2 km in dense urban areas). LoRaWAN is a star topology network architecture developed on top of LoRa physical layer for communication between a gateway and an IoT sensor.