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A multi-sensor farming prototype system for growing tomato in Algeria

This paper introduces and explains the development procedure of a smart system developed to help farmers in the growing of tomato in greenhouse in Algeria. The system based on Arduino microcontroller card, takes the values of the temperature, the humidity, the light intensity and the soil humidity in the greenhouse as input parameters. Four sensors are used to capture these values and feed them to the Arduino card. After a proper processing, the system outputs the corresponding values of the speed of fans, the illumination intensity and the amount of water used to irrigate the plant. To achieve the correct humidity and temperature, two fans are used to replace the air inside the greenhouse by air from outside. This ventilating process is quite complex due the correlation between the temperature and the humidity. The amount of water needed by the plant is controlled by a pump which is driven by a pwm dc chopper. The right values of these parameters are selected based on a thorough study of the tomato plant and its required conditions to grow efficiently.