ZigBee Wireless Soil Moisture Sensor Design for Vineyard ...

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2.2.2 Texas Instrument (Chipcon) Chipcon is one of the most popular SoC ZigBee devices in the market. Texas Instrument (TI) is the first manufacturer to combine the 8051 microcontroller architecture with the Chipcon ZigBee transceiver. This revolution made the TI wireless device the most popular among wireless system designers. Chipcon devices provide reasonable RF range and power consumption performance. The main advantage of TI devices is they provide a full featured ZigBee and IEEE 802.15.4 MAC software layer, with most of the source code. This is very attractive for software development and research applications. 2.2.3 Meshnetics Figure 9: CC243x ZigBee Development Tool Meshnetics has several ZigBee products in the market. All these devices are Atmel hardware based modules. The main advantage of the Meshnetics is they provide a more complete ZigBee stack compared to the Atmel stack. Moreover the Meshnetics ZigBee stack comes with a real time operating system (RTOS) to reduce the software development time and the complexity of introducing user defined application layer tasks. The main disadvantage of 21
the supplied ZigBee stack is that most of the source code is hidden in precomplied libraries. When developing a normal application this is not an issue, but due to unforeseen circumstances if the software developer is required to modify or change the functionality of the stack, this could create a problem. 2.2.4 Microchip Figure 10: Meshnetic ZigBee Development Tools Microchip is currently trying to enter the wireless transceiver market. At present they have a limited number of ZigBee transceivers. These transceivers have tolerable RF performance range and power consumption. In general the main advantage of Microchip devices is they normally provide all the source code to software developers. Software developers have full access to their ZigBee stack. This makes the development time faster. However the main disadvantage of the Microchip ZigBee stack is it has limited functionality compared with the TI or Meshnetics ZigBee stack. Figure 11: Microchip ZigBee Development Tool 22
Page 1 and 2: ZigBee Wireless Soil Moisture Senso
Page 3 and 4: Statement of Originality ‘I hereb
Page 5 and 6: Abstract The soil moisture level is
Page 7 and 8: 6.4.2 PCB Design Version Two ......
Page 9 and 10: Figure 46: Low Pass Filter and Comp
Page 11 and 12: 1 Introduction Wireless Sensor Netw
Page 13 and 14: 2 Literature Review 2.1 Wireless Se
Page 15 and 16: IEEE 802.15.4 networks can be separ
Page 17 and 18: The cluster tree topology is a spec
Page 19 and 20: Figure 6: Standard Technology Map [
Page 21: 2.2 Currently Available ZigBee Devi
Page 25 and 26: determine the soil moisture content
Page 27 and 28: 2.3.4 Tensionmeter A tensiometer is
Page 29 and 30: 3 Vineyard Monitoring and Managemen
Page 31 and 32: Web Server Database Server Server L
Page 33 and 34: EW . e . T T For the temper
Page 35 and 36: Heaters: This is the only method, w
Page 37 and 38: Sprinklers: Relatively warm water g
Page 39 and 40: Figure 23: Bud-break Out to Bloom S
Page 41 and 42: 4 Objective and Methodology The mai
Page 43 and 44: and heat pulse readings for calibra
Page 45 and 46: etter stability with respect to sup
Page 47 and 48: 5 Wireless Sensor Network (ZigBee M
Page 49 and 50: 5.2 Hardware Design The hardware im
Page 51 and 52: simple differential interface to th
Page 53 and 54: Figure 31: CC2430 Microcontroller M
Page 55 and 56: sensor readings are obtained via th
Page 57 and 58: 5.2.4 USB Coordinator Dongle Module
Page 59 and 60: functionality. This process allows
Page 61 and 62: 5.4 WSN Embedded Software Figure 38
Page 63 and 64: config.idleTimeout = 50; config.rx.
Page 65 and 66: frequency caused by introducing wat
Page 67 and 68: 1 1 2 1 2 1 1 2 B E C Figure 42: Cl
Page 69 and 70: oscillation characteristic. Tempera
Page 71 and 72: The input signals are sinusoidal wa
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+5V GND C19 0.1uF U6 8 Vcc Out 1 EN
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comparator reference clock circuit,
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6.5 Enclosure Design and Fabricatio
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Figure 53: Sensor Initial Calibrati
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Total Volume = 432 mL is constant.
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Once data was collected, a third co
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The main reason for the capacitance
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As the capacitance increases, the l
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Capacitance (pF) The moisture value
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In the final software calibration,
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8.2 Hardware and Software Improveme
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8.3 Second Generation Soil Moisture
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than over the whole vineyard. The s
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13. Henebry, G.M. and A.K. Knapp. S
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38. Wallace R., Antenna Selection G
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6V C18 1uF 1 3 1 5 0 0 2 1 2 1 3 1
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104 Sensor module schematics Vs 3 -
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106 Coordinator module schematics G
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108 Appendix B - Soil Moisture Sens
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Soil Moisture senor top/bottom laye
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Software Directory Soil Moisture Se
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