Modbus based Multinode Irrigation Automation

As we know that Cultivating some plants and flowers in a closed environment requires precise control of Humidity, Temperature, Light Intensity and becomes risky and difficult. So if we automate this process by using sensors and actuators whose settings are set accordingly by the user then the work and burden of the farmer gets reduced to maximum extent. In this paper we are designing this system, where we place a slave device in the land slots which acquire the data and send it to one main master device. The slave and master communicates through RS485 network using modbus protocol which is cheap and yet effective. So that the user can monitor and control each and every node from the master itself. The master also timely updates the conditions of the plants environment timely to the user through SMS using GSM technology.