Browsing by Author "Goos, Pieter"

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    Low cost sensor monitoring using mesh connected ultra-low power long-range transceivers
    (Stellenbosch : Stellenbosch University, 2023-12) Goos, Pieter; Barnard, Arno; Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering.
    ENGLISH ABSTRACT: The deployment of a sensor monitoring, or telemetry, system can reduce the upkeep cost and time investment for a farmer in the rural agricultural sector. This thesis investigates the design of a relevant network simulation tool and physical test platform. Several networking terms are discussed and used to compare and select applicable mesh routing protocols. The AODV protocol is selected, and investigated, for implementation into the remaining components of this research. Network simulation tools are investigated to predict and minimize real world deployment issues. SatSim is selected and modified f or i ncreased terrestrial link accuracy by introducing a new signal propagation simulation tool. The simulation results are compared to measured, real world, values to show their accuracy and performance. Mesh network node hardware is designed, and built, to meet low power, low cost, and long transmission range requirements. A large focus is placed on component selection. The hardware performance is characterised to prove its ability. Firmware is designed to implement a modified AODV p rotocol. Its performance is then compared to the relevant routing standard and simulator results. The results prove the designed system is functional with SatSim acting as an effective n etwork p lanning t ool. Recommendations f or i mprovements are also made.