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forms. is module is expected to be developed in a great variety of usage environments such as housing into a smart meter, installation into an outdoor monitoring post which takes wind and rain eects into account, a small plug-in radio equipped with a USB terminal, devices connected to sensors, etc.3.2Application demonstration to fisheries fieldIn the following, we report the demonstration of the low-energy wireless grid by the application of a low-energy radio with an embedded low-energy radio module. is subsection describes an example of remote sensing on the Mozuku shery as the application demonstration to the sheries eld. is demonstration laid, on the sea surface, multiple buoys which are equipped with a low-energy radio at the top and which connect to sensors that measure the sea temperature and salt concentration around the Mozuku seaweed farm on the ocean oor 8 m deep in an area 2 km from the coast, and was successful in the collection of the above periodic sensing data into a coast building through the low-energy multi-hop communications. Figure 8 is the appearance of the sensor buoy in this demonstration and Fig. 9 is the installation appearance of the sensor buoy, respectively.3.3Application demonstration to agricultural fieldis subsection describes the remote sensing and control using the low-energy radio in eld water manage-ment as an application demonstration to the agricultural eld. is demonstration combined low-energy sensing and low-latency control, and successfully operated the pattern to properly implement low-energy action in the whole PAN through radio communications by connecting to a water level sensor which assumes the water level sens-ing for the eld, to a pump and valves subject to control, and to a PCL (Programmable Logic Controller) which is sometimes used for control equipment in the agricultural business. Figure 10 shows this demonstration which was implemented in a test eld in an experiment building. Furthermore, we are planning an expanded outdoor dem-onstration in an actual eld for the future.4Conclusionsis paper described the research and development regarding low-energy action as one operation mode of a wireless grid structure. As a result of studying the imple-mentation of a low-energy multi-hop communication conguration, the battery capacity of three AA batteries or so was found to be theoretically operable over 10 years. Furthermore, developing a low-energy radio, we im-plemented periodic sensing for water temperature and salt concentration on a Mozuku seaweed farm as an application case. Consecutively, in the agricultural eld, we studied and demonstrated the setting of the low-energy radio to com-bine low-energy sensing for information on the eld water level, etc. and low-latency control for agricultural equip-ment such as a pump. A future agenda item is further function expansion assuming a variety of application elds which require low-energy action.AcknowledgmentsSUN was standardized by Professor Hiroshi HARADA of Kyoto University as IEEE 802.15.4g [1], and the social development of SUN is also being promoted through the establishment of Wi-SUN Alliance [11], a standard certi-cation body. In addition, the research and development for some of this report was supported by the Cabinet Oce, Government of Japan, Cross-ministerial Strategic Innovation FiF8　 Appearance of sensor buoyFiF9　Installation appearance of sensor buoy292-4 Research and Development on the Low-Energy Wireless Grid Technologies for Agricultural and Aquacultural Sensings