Journal of the Korea Society of Computer and Information (한국컴퓨터정보학회논문지)

Korean Society of Computer Information (한국컴퓨터정보학회)
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Design and implementation of IoT based controllers and communication module interfaces for stand-alone solar system

  • Received : 2018.10.22
  • Accepted : 2018.12.07
  • Published : 2019.01.31
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Abstract

This paper is part of research and development for stand-alone solar system without commercial power supply. It implements firmware of controller for operation of stand-alone solar system by applying IoT technology and also develops communication modules that allow multiple solar lamps to send and receive data through wireless network. The controller of the developed stand-alone solar system can effectively charge the power generated by the solar module, taking into account the battery's charge and discharge characteristics. It also has the advantage of attaching wireless communication modules to solar lamp posts to establish wireless communication networks without incurring communication costs. In addition, by establishing IoT gateway middleware platform for each installation site, it forms a foundation to operate multiple solar lamp posts into multiple clusters. And, it is expected that the data collected in each cluster will be used to enable configuration and control of operational information, thereby inducing convenience and efficiency of remote operation and management.

Keywords

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Fig. 1. IoT based monitoring and control system

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Fig. 2. Controller and communication modules

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Fig. 3. Flowchart of stand-alone solar lamp controller

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Fig. 4. Operation flow diagram of IoT gateway

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Fig. 5. Graph on the relationship between solar module voltage and battery charging voltage

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Fig. 6. Graph on the relationship between solar module current and battery charging current

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Fig. 7. Middleware class diagram for IoT gateway operation

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Fig. 8. Screen of controller data received

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Fig. 9. Screen of stored files(in case of TCP/IP communication connection failure)

Table 1. Development environment for IoT gateway middleware platform

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