| Abstract [eng] |
This master thesis deals with weather monitoring system using LoRa technology which fetches weather conditions using various sensors like temperature, humidity, soil moisture, solar radiation, accumulated precipitation, etc., The measured data from the weather station are transmitted to a farm management information system for further processing and planning field works (seeding, irrigation, crops protection, harvesting, etc.) using featured precision agriculture technologies. The main objective of this work is to develop long-range wireless data transmission solution optimising power consumption using license-free frequency ranges (169 MHz and 868 MHz). The advantage of this solution is high transmission distance using low RF power (till 100mW), high sensitivity, and data transfer security optimizing power consumption creating the possibilities to use renewable energy sources (solar energy and/or wind energy). The research methodology part in this thesis deals with the details of weather monitoring system, hardware and software architecture development optimising for electric power reduction considering time synchronization between network nodes, using of power control modes for MCU and RF transceiver and data encoding for integrity and security. Experimental part shows the workbench chosen for testing and analysing the overall energy consumption. |
