USEOFMICROCONTROLLERIN GREENHOUSECONTROL

Abstract

Greenhouseis used to grow plants under controlled climatic conditions for optimum production.This thesis aims to design monitor and controlsystem of temperature,humidity, light intensity and soil moisture of the greenhouse environment. Themicrocontroller reads sensors output and thencompares the output with a pre-decided value stored in themicrocontroller memory. Once the input value from sensor crosses set value then the microcontroller gives a high output to the relays connected to the output of the microcontroller. These relays are used to control the various parameters of the greenhouse environment. It can connect the first relay to the fan to control the temperature.Second relay to the sprayer to control thehumidity. Third relay to the water pump to increase the soil moisture. Liquid crystal display (LCD) is used to display parameters values.