Design of Security Alarm System Based on LoRa Technology.

At present, in order to overcome the shortcomings of traditional wired cabling and deployment, including complex construction and high cost, most of the security alarm systems employ ZigBee, Wi-Fi and other wireless technologies, whose communication distance, however, are severely limited. This paper proposes a new type of wireless security alarm system, which uses LoRa radio frequency chip of SX1278 series and adopts a star-shaped network topology to achieve the acquisition and long-distance transmission of data from alarm detectors. It meets the demand of low-cost, wide-coverage for alarm network deployment. Through testing, this wireless security alarm system has the advantages of long transmission distance, low cost, high reliability, and convenient networking. It offers a significant reference for Internet of Things applications, which requires a wide wireless network coverage.