Microcontroller-Based Solar Data Logger System using Proteus Virtual System Modeller

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1 0 st International Conference on Future Trends in Computing and Communication Technologies Microcontroller-Based Solar Data Logger System using Proteus Virtual System Modeller Nurhakimah M.Mukhtar School of Electrical Systems Engineering University Malaysia Perlis (UniMAP) Perlis, Malaysia Nur S.Noorpi, Melaty Amirruddin and Hana A.Halim School of Electrical Systems Engineering University Malaysia Perlis (UniMAP) Perlis, Malaysia Abstract This paper presents a modeling and simulation of a Microcontroller-Based Solar Data Logger System. The Data Logger System is proposed to measures and records the data at a certain logging intervals. This paper describes how Data Logger is used to collect readings using sensors such as photodiode. These sensors could be measured industrial parameter which is solar radiation. When a data logger is powered, the microcontroller ATC is designed to get instruction from the operating system that is loaded in the data logger memory. This microcontroller is a single chip that control based on system software design using Proteus and KeilC. At the same time, data from the measurement will be display on LCD (Liquid Crystal Display). This system displayed and captured the real time data in the LCD and stored in kbyte of non-volatile memory. The prototype of Data Logger System was successful implemented and tested through simulation using Proteus Virtual System Modeller (VSM) software. Keywords-Microcontroller, Data Logger, Photodiode Sensor, Proteus VSM I. INTRODUCTION A data logger is an electronic device that records data over time or in relation to location either with a built in instrument or sensor or via external instruments and sensors []. They generally are small, battery powered, portable, and equipped with a microprocessor, Real Time Clock (RTC), external memory for data storage, and sensors. Data loggers interface with a personal computer and utilize software to activate the data logger and view and analyze the collected data, while others have a local interface device (LCD) and can be used as a stand-alone device. Data loggers vary between general purpose types for a range of measurement applications to very specific devices for measuring in one environment only. One of the primary benefits of using data loggers is the ability to automatically collect data on a -hour basis. Upon activation, data loggers are typically deployed and left unattended to measure and record information for the duration of the monitoring period []. This paper proposed to measures and records the data at a certain logging intervals. It is a standalone system powered by ordinary battery which is V. With the RTC system, the time can be maintained even with power disconnected from the board. The system is designed to store in kbyte of non-volatile memory. Proteus VSM is EDA tool that developed by the British LabCenter Electronics. There are part which is ARES; advanced routing editing software and ISIS; convenient software platform for electronic system simulation []. Proteus system is very well suited for educating future engineers in wide area of applications. It supported by major embedded system tool vendors such as Keil, Microchip, Atmel, IAR and their debuggers [],[]. In this paper, the standalone system is simulated by Proteus ISIS software. II. PROPOSED WORK Data Logger System was designed, implemented and tested. Generally, this project was divided into programming and simulating parts. The programming part consists of C language of microcontroller using Keil μvision software. The hex files code will be downloaded to ATC in Proteus VSM to check the functionality of the system. The simulating part equipped with sensor, main controller unit, Analog to Digital Converter, external memory, Real Time Clock and LCD Display. The system was built around by the microcontroller ATC chip, reset button, input and output port. The

2 0 st International Conference on Future Trends in Computing and Communication Technologies battery was used is V. A x character LCD was used to display real time data to the user. Figure show the general overview of the data logger system. The photodiode was used to sense the incoming solar insolation level. The Analog to Digital Controller (ADC) converter has a maximum input of V. In order to read the voltage, it was necessary to use a voltage divider to guarantee the voltage seen by the ADC was within its range. Figure show the flowchart of programming. VDC Input (from battery) SENSOR MEMORY Explanation below tells how to setup and uploading the data for Analysis. Table I indicates the functions of assigned key. Key Functions TABLE I FUNCTIONS OF ASSIGNED KEY Clarification 0 To the new set time and date To display the instantaneous value or to display the date and time that newly install. To give command for logging the new data. ANALOG TO DIGITAL CONVERTER µc BOARD PERSONAL COMPUTER To display the logging data that already install in the logger. LCD RTC Fig.. General overview of system III. DATA CAPTURE SYSTEM The Data Logger is a self-contained a microcontroller, battery powered and equipped with external memory for data storage, real time clock and photodiode sensor. It is powered by a standard V alkaline battery and converted it to V to makes it s suitable for IC Microcontroller. A. Data Logger When the Data Logger is first turned on, the system will greet the user with a quick greeting and the display at LCD appears WELCOME. Fig.. Welcome Message Under normal condition, at the first line on LCD will display the date and on the second line the system will display the clock time in the same format as in the time set mode. The LCD will display the instantaneous insolation value in Lux also on the second line. Fig.. Flowchart of data logger system Fig. : Screen shows the time and date

0 st International Conference on Future Trends in Computing and Communication Technologies The user may reset the time and date during operation by pressing the time and date set by 0 key functions

3 0 st International Conference on Future Trends in Computing and Communication Technologies The user may reset the time and date during operation by pressing the time and date set by 0 key functions that already explain above. The user also can view the reset time and date that newly install such as pressing key functions. The clock will now automatically update the time. Using the RTC, it will provide the accurate time of each data record to the system. System time can be displayed the present time using DS0 chip module. TABLE II MAXIMUM DEPLOYMENT DURATION Logging Interval (sec) Maximum Deployment Duration 0. hours 0. days 0. days 00. days 00. days Fig.. System start to logging the data Pressing the key function will make the previously stored data erased automatically. So, the user must make sure to store or save the logger data firstly before there start logging a new session. The LCD will then display the message Logging on the LCD screen at the second line. Setup is now completed and the system will commence normal logging operation. Table II shows the available logging intervals and corresponding maximum deployment durations. Considering the cyclic record mode, the data in device is the records generated in.~. days durations time. IV. VIRTUAL TERMINAL SYSTEM Figure show the simulation result using Virtual Terminal. Virtual Terminal used during setup. B. Full Resolution From the characteristic of photodiode, its need to calculate the value of Lux (); Lux = * Vo () For full resolution (V), the lux value is equal to.klx. The system will display in.klx on LCD if the photodiode get full insolation. C. Logging Interval The benefit of using data loggers is the ability of the system to collect data on hours basis. The external memory used for storing measured data. Only data lines are required for control and storage using the standard I C bus arrangement. Data is transferred serially using this protocol. Data is stored permanently in these devices, even with the power disconnected. Data is stored in non-volatile memory. If the data logger memory becomes full, the unit powers down automatically without loss of data. Data can be offloaded to a computer at a later time. The Solar Data Logger has room for up to,000 readings. Fig.. Simulation Result This system also added by a multiple choice to make this project to be flexible for user which is using a button. This button used to select a Logging function. The system continuously samples the insolation level and stores an average value over the logging interval to the external memory. The logging interval can range between minute and hour in single minute increments. The value displayed on the LCD is the logging interval in second. Each reading occupies -bytes of memory. The external memory can store up to,000 data points. If the logging interval is set at second, the logger can operate continuously for half of the days before using up the memory.

4 EA Illuminance(klx) 0 st International Conference on Future Trends in Computing and Communication Technologies If the logging interval is set at minute, the logger can operate continuously for. days before running out of memory. ::.0 ::. From Figure the graph found that the highest value of data captured is.klx. Vo = Lux / =.klx / =.V Fig.. Start logging the data with present time and date To read the data logging, pressing key functions. By pressing this functions will immediately commence a data upload of any data previously stored in the logger before it was turn off. RS was created in this research for one purpose which is to interface between Data Terminal Equipment (DTE) and Data Communications Equipment (DCE) employing serial binary data interchange. DTE is represent a Personal Computer (PC) and DCE represent by DB cable. The data in terminal program on the PC may then be copied into another program for storage or analysis. The data may be uploaded as many times as the user desires. Vo = Lux / =.klx / =.V So the output voltage for the highest should be like calculation below. The lowest value.klx also calculates...0. EA Illuminance versus Time A. Data Analysis From the data, user can observe the result for analysis. Table III shows the reading of voltage for a certain time per day. From result at Table III, user can use the graph to observe the result as shown in Figure. 0 :: :: ::0 :: :: ::0 :: ::0 :: :: Time Fig.. EA Illuminance versus Time Time TABLE III RESULT OF MEASUREMENT Value (klx) ::. ::.0 ::0. ::. ::. ::0. ::. V. CONCLUSION AND FUTURE WORKS The project entitled Microcontroller-Based Solar Data Logger System was successfully done. Data Logger is an electronic device that records data over time or in relation to location with a built in instruments and sensors. The objective of optimizing natural light resources or sunlight in order to observe the intensity of energy is achieved. An intelligent program for controlling the sensor applied to Solar Data Logger was successfully developed. Solar Data Logger can detect the sources with produce a value and log it into logger. Using serial communication it can be save by user manually. The whole project was done successfully and the aims and objectives were achieved. Last but not least, this system is able to ease the human life and save energy. ::0.

5 0 st International Conference on Future Trends in Computing and Communication Technologies For recommendation, the logger hardware and software are needed to specifically design for stand-alone data logging applications. This means that it is easy to connect and set up sensors and the logging system is more rugged and less power hungry. For example is use button to setup the Data Logger. ACKNOWLEDGMENT The author thanks to Universiti Malaysia Perlis for preparation of technical and financial supports to completed this research. The technical supports from all Electrical Systems Engineering staffs for helping us throughout this research project are highly appreciated. Not to forget, special thanks for the financial support through the Short Term Grant (STG). Thank you. REFERENCES [] Purwadi, A., Y. Haroen, et al. (0). "Prototype Development of a Low Cost Data Logger for PV Based LED Street Lighting System." International Conference on Electrical Engineering and Informatics, - July 0, Bandung, Indonesia. [] Yongzheng, Z. and X. Yingsha (0). "The Design and Implementation of Embedded System." (IEEE 0). [] Cika, D. and D. Grundler (00). "Proteus Virtual System Modelling used for Microcontroller Education." MIPRO 00, - May 00, Opatija, Crotia. [] Hai-feng, Z., X. Zhi-long, et al. (00). "Simulation Design of Inverter in Solar Photovoltaic System Based on MCU." (IEEE 00). [] Sehgal, V. K., Nitin, et al. (00). "Smart Wireless Temperature Data Logger using IEEE 0../ZingBee Protocol." (IEEE 00). [] Muhammad Ali Mazidi, Janice Gillispie Mazidi and Rollin D. McKinlay (00). The 0 Microcontroller and Embedded Systems, Using Assembly and C. nd Edition, Person Education, Inc., Upper Saddle River, New Jersey [] I. Scott Mackenzie and Raphael C.-W. Phan (00). The 0 Microcontroller. th Edition, Person Education, Inc., Upper Saddle River, New Jersey. 0

6 0 st International Conference on Future Trends in Computing and Communication Technologies Fig.. Overall system simulation using Proteus VSM. XTAL XTAL ALE 0 EA PSEN RST P0.0/AD0 P0./AD P0./AD P0./AD P0./AD P0./AD P0./AD P0./AD P.0 P. P. P. P. P. P. P. P.0/RXD 0 P./TXD P./INT0 P./INT P./T0 P./RD P./WR P./T P./A P.0/A P./A P./A0 P./A P./A P./A P./A MICROCONTROLLER ATC D D D D D 0 D D D0 E RW RS VSS VDD VEE LCD CS VIN(+) VIN(-) CLK VREF DO CONVERTER ADC0 X CRYSTAL.0MHz C p C p R k C 0u VBAT X X SCL SDA SOUT REAL TIME CLOCK DS0 X CRYSTAL.KHz B V SCK SDA WP A0 A A EEPROM LC R 0k R 0k TIN ROUT TIN 0 ROUT TOUT RIN TOUT RIN C+ C- C+ C- VS+ VS- U MAX C u C u C0 u C u J CONN-DF RV 0k RV k PHOTODIODE UF00 R 0k

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