Field automatic warning network based on LoRa

Aiming at problems such as insufficient communication coverage, high power consumption and complex deployment, a low- power wide-area monitoring network architecture based on LoRa technology is proposed in this paper. The network adopts the dual-star hybrid topology, combines the dynamic spread factor allocation and time division multiplexing mechanism, and realizes the balance between low power consumption and long distance communication by optimizing the configuration of LoRa parameters (bandwidth, spread factor, coding rate).Regarding hardware design, the STM32 series microcontroller and SX1268 RF module are used to build terminal nodes, which support multi-sensor access and power partition management. At the software level, an adaptive anti-collision algorithm is proposed, which combines signal enhancement and collision decoding technology to improve network reliability.