Light intensity and human machine interface environmental control of a greenhouse system

Abstract

This paper presents the regulation of light intensity control of a greenhouse system by using human machine interface. This objective of this paper is to support in the growth of plant even in sunless environment by using light emitting diode (LED). To design the prototype of a greenhouse system, it was built and instrumented with appropriate sensor such as light dependent resistor (Ldr) to measure the light intensity. There is also another factor that will help in the growth of plant such as temperature, humidity and carbon monoxide but this paper will focus more on the light intensity. The method that will be use is by supplying suitable amount of light source for the growth of basil by using combination of red and blue LED's considering their wavelength. Android and MIT application inventor 2 is used to control the light intensity which act as a human machine interface. Arduino (Uno) as a microcontroller and Bluetooth module as interface between Arduino and android. If light dependent resistor (ldr) sense insufficient light, alarm will trigger to alert surrounding. Then press push button, and led will on. By considering suitable light intensity it can be controlled through smart phone. The reading of the light intensity will be measure manually by using lux meter. With this system, it is expected that it can support in the growth of plant such as basil plant even in the sunless environment. To develop the system is easy and cost efficient.