Design of Distributed Agricultural Service Node with Smartphone In-field Access Supporting for Smart Farming in Beijing-Tianjin-Hebei Region

1Department of Computer Science and Technology, North China Institute of Science and Technology, Langfang, Hebei 065201, China 2Hebei IoT Monitoring Engineering Technology Research Center, North China Institute of Science and Technology, Langfang, Hebei 065201, China 3College of Information Science and Technology, Donghua University, Songjiang, Shanghai 201620, China 4School of Economics and Management, Yanshan University, Qinhuangdao, Hebei 066004, China