wireless monitoring system of gas detector - Faculty of Electrical ...

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43 The last step is to test the connection between two zigbee. Figure 3.22 shows the data transfer between two zigbee is succesful. As shown in figure 3.22, the writing in blue colour is the data transfer at COM40. Meanwhile, the red colour in COM44 is the receiver and vice versa. Therefore, both of the Zigbee can be used as the receiver and transmiter terminal. Figure 3.22: Test The Connection of Both Zigbee. 3.3.4 LABVIEW Labview is used in the monitoring system in this project. Therefore, for interfacing the data transfer by zigbee in the LABVIEW, Virtual Instrument Software Architecture (VISA) configuration serial ports are required. VISA is the lower layer of functions in the LabVIEW instrument driver VIs that communicates with the driver software to communicate with extenal I/O devices such as zigbee modules. Figure 3.23 shows the VISA interfacing block diagram connection. There are three levels for the visa interface which are configure serial port, visa read and VISA closed. All three of the parts are a must have for the interfacing process.
44 Figure 3.23: VISA Interfacing Block Diagram The first level visa configure serial port is for initializes the serial ports specified by visa resources name to a specified settings. Wire data to the visa resources name input to determine the polymorphic instance to use or manually sellect the instance. In this project, COM 40 has been chosed as the zigbee port in that location. Besides that, the value of 9600 in the Figure 3.23 shows the bound rate of the project system from arduino and zigbee. From the Figure 3.23 also, the grey line in the figure shows the while loop for repeating the subdiagram inside it untill conditional terminal, an input terminal receives a particular Boolean value. The Boolean value depends on the continuation behaviour of the loop. Figure 3.24: VISA Read Output
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WIRELESS GAS MONITORING SYSTEM OF G
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“I hereby declare that I have rea
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ii I declare that this thesis entit
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iv ACKNOWLEDGEMENT In preparing thi
Page 9 and 10:
vi ABSTRAK Tujuan projek ini adalah
Page 11 and 12: viii 2.1 Introduction 6 2.2 The Haz
Page 13 and 14: x LIST OF TABLES TABLE NO. TITLE PA
Page 15 and 16: xii 3.1 Methodology of the Project
Page 17 and 18: xiv LIST OF SYMBOLS CO - Carbon Mon
Page 19 and 20: xvi LIST OF APPENDICES APPENDIX TIT
Page 21 and 22: 2 min, and death within 30 min. Ver
Page 23 and 24: 4 iv. Zigbee Arduino Uno is a devic
Page 25 and 26: 6 CHAPTER 2 LITERATURE REVIEW 2.1 I
Page 27 and 28: 8 (which is 300ppm), the actuator c
Page 29 and 30: 10 2.2 The hazardous gases Based on
Page 31 and 32: 12 From Ohms Law in equation 2.1, v
Page 33 and 34: 14 advanced analysis and data visua
Page 35 and 36: 16 2.5.1 Buzzer Figure 2.10: Buzzer
Page 37 and 38: 18 2.5.3 Exhaust Fan Exhaust fan as
Page 39 and 40: 20 Start Writing programming and co
Page 41 and 42: 22 Figure 3.3: Experiment Diagram o
Page 43 and 44: 24 Figure 3.6: Gas Sensor Circuit D
Page 45 and 46: 26 Table 3.1: Threshold Value for G
Page 47 and 48: 28 Last but not least, the output c
Page 49 and 50: 30 As mention in chapter 2, Arduino
Page 51 and 52: 32 iii. Step 3: (200, 2) (1000, 1)
Page 53 and 54: 34 iv. Step 4: Since Arduino only r
Page 55 and 56: 36 start read the output voltage by
Page 57 and 58: 38 void setup() { Serial.begin(9600
Page 59 and 60: 3.3V RX TX 5V GND 40 digitalWrite(l
Page 61: 42 The set up for the Zigbe data tr
Page 65 and 66: 46 The last stage in the data monit
Page 67 and 68: 48 Figure 3.28: Step 2 Then, the fi
Page 69 and 70: 50 CHAPTER 4 RESULT AND DISCUSSION
Page 71 and 72: 52 The overall project set up shown
Page 73 and 74: 54 After that, the system of gas mo
Page 75 and 76: 56 CHAPTER 5 CONCLUSION AND RECOMME
Page 77 and 78: 58 REFERENCES [1] Incorporated, C.
Page 79 and 80: 60 APPENDIX 1. Block diagram for MQ
Page 81 and 82: 3. Arduino programming for MQ3 62
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