Wireless sensor networks (WSNs) are of great interest in agriculture in analyzing and monitoring the effects of soil quality, irrigation, fertilization, and environmental conditions on plant growth and health. Currently, WSNs are battery-powered. The use of batteries leads to potential problems, given their limited lifespan and the need for replacement. Supercapacitors coupled with energy harvesting solutions are a possible substitute for batteries in WSNs. Therefore, this thesis aims to discover the energy harvesting capabilities of plant microbial fuel cells (PMFC) for long-term usage in WSNs. The PMFC is a technology that produces bioelectricity by utilizing plants and bacteria. Plants in the PMFC produce organic matter, while bacteria are responsible for oxidizing this organic matter to release electrons, protons, and carbon dioxide.