The power of wireless sensor network node is usually provided by a dry battery, which the power energy is limited, and the life cycle of wireless sensor network is determined by the battery directly. On the basis of the analysis of energy-saving mechanism of wireless sensor networks, have come up with a plant electrolyte power, a new renewable energy, which attains energy from the electrolytes in the body of plants. The plant electrolyte power can be used in the tropical crop pest monitoring system and it can also be widely applied in wireless sensor network node associated with the plant.
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