The membership functions, a at input Error, b at Change of Error, c at output

42 the microprocessor is shown in figure 8. above. The sequence of switching on and off is given in the table . Switch ‐ ‐ ‐ ‐ ‐ ‐ ... Red Light OFF ON ON OFF ON ON Blue Light ON OFF ON ON OFF ON Green Light OFF OFF OFF OFF OFF OFF Results: BLUE RED PURPLE BLUE RED PURPLE 2.5. The Flood and Drain Sequence. The Flood and Drain of the water so;ution in to the grow tank is arranged by only the onoff period of the pump using a timer generated inside the microcontroller. The power source of the pump is a V DC connected through a relay, driven by a seried transistor to be controlled by the low powered signal from the microcontroller. The period and the length of pumping is predeterminde by the operator , by keying the time period in to the system using the keypad provided.

3. Conclusions

n this paper, Automation System for ydroponic Plantation Based on Flood and Drain Method has been designed and built. The system shows promising automated control of the aspects necessary in hydroponics farming using the method by having most those aspect of p, nutrition, lighting, and water flow under good controlled, providing the simplification hydroponics farming process. We had tried to apply the Fuzzy logic control to manage two of those important parameter for vegatable growing wil a success.There is still yet many room for improvements in the system such as using Neural Network or others algorithms in closed loop control of other aspects beside the p, which may be developed in the future. References PRNewswire. [Online].: http:www.prnewswire.comnews‐releases growth‐in‐the‐ hydroponics‐food‐industry‐set‐to‐outpace‐global‐markets‐by‐8 ‐ .html Karsono, Sudibyo, et al. . Hidroponik Skala Rumah Tangga. Jakarta : Agro Media Pustaka Sutioso, r. Yos. . Hidroponik Ala Yos. Jakarta : Penebar Swadaya SA orticulture [Online]. Available: http:sahorticulture.co.zasix‐hydroponic‐systems Resh, oward M. 8 . From Hydroponic Food Production. Woodbridge Press Kleitz, William. . Digital Electronics A Practical Approach. Fourth Edition. New Jersey : Prentice‐all nternational, nc. Bentley, John P. . Principles of Measurement System. Third Edition. Singapore : Longman Scientific Technical Mettler T., , Basic of Titration, Mettler‐Toledo AG, Analytical, C‐8 Schwerzenbach, Switzerland. METTLER T., , A Guide to p Measurement – the theory and practice of laboratory p applications”, Mettler‐Toledo AG, Analytical, C‐8 Schwerzenbach, Switzerland. Djaffri, Andhika Kumara , thesis, Departement of Electrical Engineering, Universitas ndonesia, Kampus U Depok, , ndonesia, in ndonesian . 43 On the Performance of Wireless ECG Monitoring System: Case of Off ‐Body Communications Basari a , M. Anugrah Agung a , Fitri Yuli Zulkifli a , Eko Tjipto Rahardjo a a Department of Electrical Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok City, West Java, Indonesia 16424 Abstract World ealth Organization WO reported that heart disease, stroke, lower respiratory infections and chronic obstructive lung disease have remained the top major killers in the world during the past decade. n ndonesia, it covers or about .8 millions mortality cases. ence, human vital sign monitoring such as electrocardiograph ECG monitoring system is very essential for mitigating and preventing people fail to be handled a proper assistance from healthcare physicians. n this paper, we propose a real time ECG monitoring system, which the ECG data is able to be checked wirelessly at specified device directlly without any server for data pooling centralized database . ECG QRS wave and arrhythmia detection are important features for ECG monitoring system. Up to now, there are several studies ECG wave detection, however, they are mainly focus on internet of things ‐ based telemedicine system for data transfer. n this case, real time monitoring system could be disrupted by a pooling time and packet loss due to its P‐based connection. ence, in this study, we propose a wireless ECG monitoring system with direct point to point communication at . Gz by using ‐lead acquistion system on single channel wireless ECG device. The system is developed based on AD8 chip for acquisition, NRF wireless link platform for data transfer and Arduino microcontroller for ECG data processing. n order to evaluate the performance of wireless ECG system, we use wearable textile antennas as Tx and Rx antenna , on which are attached the human body and experimentally tested in indoor environment, representing an off‐body communication. The results show that the developed system is able to transfer and display real time ECG signals up to approximately m of obstruction environment, which the measurement is conducted in a sitting position of volunteers. We have also validated the obtained ECG data, comparing to the data taken from the healthcare clinic equipment. Moreover, according to QRS wave analysis, our ECG signals have reasonable RR, PR, QRS and ST wave interval comparing to the standard ECG signals. Keywords Electrocardiograph; off‐body communications; real time monitoring system; textile antenna; wireless communications

1. Introduction

World ealth Organization WO has reported that heart disease, stroke, lower respiratory infections and chronic obstructive lung disease have remained the top major killers in the world during the past decade. The hearth desease contributed about 8. or . millions of death in the world, where in ndonesia, it covers or about .8 Corresponding author. Tel.: + ‐ ‐ 8; fax: + ‐ ‐ . E ‐mail address: basyarieeng.ui.ac.id