An Intelligent Wireless Networking and Application Layer Protocol Design Based on LoRa

Aiming at the problem of LoRa wireless communication network, this paper analyzes the access mechanism based on polling, time slice and trigger between LoRa terminal and LoRa gateway, summarizes their advantages and disadvantages, and analyzes the main parameters affecting signal transmission performance in LoRa modulation, such as spread spectrum factor, bandwidth, error correction coding rate, etc. A LoRa Modbus RTU protocol is established, and a wireless networking design based on LoRa is proposed, and its communication message application format is designed. The experimental results show that the scheme can complete intelligent wireless communication, and the communication packet efficiency is high. The relationship between spread spectrum factor and polling delay period is given.