Available ONLINE www.vsrdjournals.com VSRD-IJEECE, Vol. 2 (6), 2012, 337-345 _ 1,2,3,4Research Scholar, Department of Electronics it makes the set-up low-cost and effective nevertheless. The program implements the Control Algorithms, sending control signals to the smart sensors in order to reach the desired conditions. As the system also employs an LCD display for continuously alerting the user about the condition inside the greenhouse, the entire set-up becomes user friendly. Keywords : WSN, Embedded System, MCU. 1. INTRODUCTION Many research and projects have been done in order to improve the conditions and cultivation of crops under greenhouse. Often it is necessary to develop a control system to implement these studies. Wireless sensor networks (WSN) have recently received a lot of attention in research community because of their continuous advancement. A greenhouse is a structure with different types of covering materials, like glass or plastic roof and frequently glass or plastic walls; it heats up because incoming visible solar radiation from the sun is absorbed by plants, soil, and other things inside the building. Glass is transparent to this radiation. The warmed structures and plants inside the greenhouse re-radiate this energy in the infra-red, to which glass is partly opaque, and that energy is trapped inside the glasshouse. Although there is some heat loss due to conduction, Jinling Institute of Technology (221.226.37.162) - 2012/11/9 DownloadManish Mittal et al / VSRD International Journal of Electrical, Electronics when the input is below another (lower) chosen threshold, the output is low; when the input is between the two, the output retains its value. Jinling Institute of Technology (221.226.37.162) - 2012/11/9 DownloadManish Mittal et al / VSRD International Journal of Electrical, Electronics soil wet sensor circuit, light intensity sensor circuit, GSM modem thru serial communication cable to the AT89S52 micro controller. Fig. 9 : Complete Hardware Jinling Institute of Technology (221.226.37.162) - 2012/11/9 DownloadManish Mittal et al / VSRD International Journal of Electrical, Electronics Dae Heon Park; Kyung Ryung Cho; Chang Sun Shin; Sung Eon Cho; Jang Woo Park; A Jinling Institute of Technology (221.226.37.162) - 2012/11/9 DownloadManish Mittal et al / VSRD International Journal of Electrical, Electronics Haron, M.N Design of digital display system for ISFET pH sensor by using PIC microcontroller Unit (MCU) Quality Electronic Design, 2009. ASQED 2009. 1st Asia Symposium on Digital Object dentifier: 10.1109/ASQED.2009.5206281 Publication Year: 2009, Page(s): 148 152 IEEE CONFERENCES 4 Hongbo Sun; Tan, D.K.P.; Yilong Lu; Aircraft target measurements using A GSM-based passive radar Radar Conference, 2008. RADAR 08. IEEE Digital Object Identifier: 10.1109/RADAR.2008.4721053 Publication Year: 2008 , Page(s): 1 6 IEEE CONFERENCES 5 Jifeng Ding; Jiyin Zhao; Biao Ma; Remote Monitoring System of Temperature and Humidity Based on GSM Image and Signal Processing, 2009. CISP 09. 2nd International Congress on Digital Object Identifier: 10.1109/CISP.2009.5304519 Publication Year: 2009 , Page(s): 1 4 IEEE CONFERENCES 6 Yan Hongwei; Pan Hongxia; Remote data monitoring system design based on GSM short message service Industrial Electronics 7 Stipanicev D., Marasovic J., Networked embedded greenhouse monitoring and control, Proceedings of 2003 IEEE Conference on Control Applications, June 2003. 8 Turnell, D.J. de Fatima, Q.V., Turnell, M., Deep, G.S., Freire, R.C.S., FarmWeb-an integrated, modular farm automation system, Proceedings of IEEE International Conference on Systems, Man, and Cybernetics, Vol. 2, Oct. 1998. Jinling Institute of Technology (221.226.37.162) - 2012/11/9 Download