1 INTELLIGENT PEST REPELLENT SYSTEM FOR SRI LANKAN FARMING INDUSTRY P.N. Karunanayake W.H.H.N. de Soysa J.A.C.L.C. Jayasundara Y.G. Wanniarachchi A.P.I. Karunarathne Abstract: Sri Lanka has a culture based on agriculture which has been descending from centuries. Currently in Sri Lanka cultivation activity from ploughing to harvesting and packing being carried out by machinery with less amount of labour. But even with such machines involved in the field, farmers find it very difficult to protect their crops from pests which cause maximal damages when strict supervision is absent. Though insects and rodents can be controlled by using pesticides, larger pests such as wild boars, warthogs, porcupines and birds cannot be controlled using such methods since it requires manpower to keep them away from the crops. The absence of advanced technology involved in this area has led the farmers to face many difficulties such as profit loss, the requirement of excess manpower to protect the crops from pests and usage of illegal and inhumane pest attack prevention mechanisms. A novel approach is introduced as a solution for the mentioned difficulties. Wireless sensor network is used to detect pests in the field, and once a pest is detected, an appropriate repellent system which is harmless to animals and the environment is activated by the system. Emitting ultrasonic sound waves and high-intensity flash lights are used as the repellent systems. Since there is a probability of sensor node failures, central node evaluates a pattern of the arrival of pests. When the central node detects a failure of one or more sensor nodes, it activates the repellent system automatically according to the evaluated arrival pattern of the pests and notifies about the node failure to the owner. Therefore this system is focused on the implementation of user-friendly, energy efficient, intelligent autonomous pest repellent system. Key Words: Intelligent, Wireless Sensor Networks, Pest Repellent, Autonomous, Pattern Recognition 1. Introduction Among the various agricultural sectors in Sri Lanka, the primary form of agriculture is rice production. Rice is the single most important crop occupying 708,000 hectares of land in Sri Lanka by 2016 [1]. In the past, the farmers used to the spent high amount of man power for cultivation, but nowadays with almost every cultivation activity from ploughing to harvesting and packing being carried out by machinery resulting minimization of labour requirement. The farmer is being transformed to a part time manager who coordinates various activities. But even with such machines involved in the field, Sri Lankan farmers find it very difficult to protect their crops from pests which cause maximal damages if strict supervision is absent. Though insects and rodents can be controlled using pesticides, larger pests such as wild boars, warthogs, porcupines and birds cannot be controlled using such methods since it requires manpower to keep them away from the crops. As a result, pest controlling has become major problem leading to economic, social and ethical issues in the Sri Lankan society such as, • Animal poacher. • Animal attacks on humans. • Usage of illegal pest control mechanisms. • People being victims of their own traps ( ex: Trap Guns ) • Crop Losses Eng. P.N. Karunanayake, M.Eng.(SL), B.Sc. Eng. (Moratuwa), Department of Electrical, Electronic & Telecommunication Engineering, General Sir John Kotelawala Defence University, Sri Lanka. W.H.H.N. de Soysa, B.Sc. Eng. (KDU), Department of Electrical, Electronic & Telecommunication Engineering, General Sir John Kotelawala Defence University, Sri Lanka. J.A.C.L.C. Jayasundara, B.Sc. Eng. (KDU), Department of Electrical, Electronic & Telecommunication Engineering, General Sir John Kotelawala Defence University, Sri Lanka. Y.G. Wanniarachchi, B.Sc. Eng. (KDU), Department of Electrical, Electronic & Telecommunication Engineering, General Sir John Kotelawala Defence University, Sri Lanka. A.P.I. Karunarathne, B.Sc. Eng. (KDU), Department of Electrical, Electronic & Telecommunication Engineering, General Sir John Kotelawala Defence University, Sri Lanka.