Browsing by Author "Minga, Lusajo"

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    Development of Internet of Things-Based System for Monitoring and Controlling the Water Quality in Small-Scale Aquaculture
    (MUST Journal of Research and Development, 2023) Nyoni, Abbas; Minga, Lusajo; Kusyama, Sadiki L.
    Water quality is an essential factor for any successful aquaculture project. For high productivity from aquaculture, critical water quality parameters such as temperature, pH, dissolved oxygen, salinity, and turbidity must be kept in the optimum range. Temperature is the second-most critical water quality parameter after dissolved oxygen. Tropical fish prefer temperatures ranging from 250 c to 320 c. This study designed and implemented a system prototype for monitoring and controlling water temperature in an aquaculture environment based on the Internet of Things (IoT). The system comprises temperature sensors, a NodeMCU Esp8266 Microcontroller, a 2-channel relay switch, a liquid-crystal display, a cooling fan, a water heater, and a mobile application. The temperature sensor immersed in a fish pond collects the pond's temperature. The collected temperature data from fish ponds is sent to the microcontroller, a NodeMCU Esp8266, for processing and transmission to the cloud server. The Blynk Cloud IoT platform was used for data visualisation and controlling actuators. The system users could access data through the Blynk Mobile application installed on a smartphone. The system automatically switches ON the cooling fan to cool the water when the temperature is above 32o c and switches ON the water heater when the temperature is below 25o c. The system was tested both in the laboratory and in field to evaluate the system's performance in detecting pond temperature and data dissemination to the users. This study's findings have proved the system's capability in data acquisition with accuracy and efficiency. In addition, the results have shown that the system can effectively control pond temperature.