smart irrigation ppt
TRANSCRIPT
PRESENTED BY
ANJALI GOPAL
GUIDED BY Prof. PRADEEP
HOD ECE
GSM BASED SMART IRRIGATION
• ObjectiveIntroductionArchitectureResourcesFlow chartExecution codeConclusion
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OVERVIEW
INTRODUCTION
Reduce the man power & conserve the water
Real time sensing and control
Interfacing of microcontroller through moisture sensor and hence to GSM through MAX 232
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ARCHITECTURE
MasterControlle
r32bit
solenoid
Relay driver
Water
Pump
ADC
Moisture sensor
MAX 232
GSM Power supply
User
Android
mobile
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RESOURCES
SENSORMICROCONTROLLERMAX 232GSM
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SENSOR
The feedback control mechanismfrequency domain moisture sensors (capacitance
sensor)
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SOIL MOISTURE MEASUREMENTS
DIRECT METHODS
THERMO-GRAVIOMETRIC
THERMO-VOLUMETRIC
INDIRECT METHODS
VOLUMETRIC
TENSIOMETRIC
6
cru.cahe.wsu.edu/CEPublications/FS083E/FS083E.pdf
SOIL MOISTURE SENSORS
TRANSIOMETRICVOLUMETRIC
TDR
FDR (CAPACITANCE
SENSOR)
NEUTRON PROBE
GYPSUM BLOCK
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Time domain reflectometry sensors(TDR)
• TDR is the most accurate sensor
• measure the reflectance of the pulse
• The travel time of the pulse is used to directly calculate dielectric const(Ka)
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Neutron probe sensors• Measure hydrogen atoms in the soil
• The neutrons collide with hydrogen atoms in the soil (i.e. water)
• More collisions the more water in the soil
• A measurement is made of the number of neutrons that have collided
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Frequency domain sensors (capacitance sensors)
•Determines Ka by measuring the charge time of a capacitor
•Ideal in field applications using wireless networks
•Better resolution than TDR
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HYDRA PROBES• Relatively inexpensive and widely used
• It measures both the real (εr) and Imaginary (εi) components of the complex soil dielectric constant at 50 MHz
•Hydra Probe is buried in the soil hence referred as “in-situ” placement
• Buried at several different depths in order to measure soil parameters over a wide area
• power supply 7-30VDC 30.7.201511
• The Hydra probe is a sensor that consists of : a 4-cm diameter cylindrical head four 0.3-cm diameter tines tines protrude 5.8 cm measure temperature
• The Hydra Probe delivers very accurate measurements of soil conditions, including:
soil moisture temperatureelectrical conductivityDielectric permitivity 30.7.201512
• The Hydra Probe is available in three versions:
SDI-12 RS-485 Analog
• ANALOGfast measurement rateThe output is 4 voltages
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The tines serve as wave guides
Tines are pushed into soil material
The probe converts the signal response into the dielectric permittivity
14
http://www.stevenswater.com/soil_moisture_sensors/
MICROCONTROLLER The NXP (founded by Philips) LPC2129 is an ARM7TDMI-S 32-bit RISC Microcontroller 256KB on-chip Flash ROM with In-System Programming (ISP) and In-Application Programming (IAP) 16KB RAM 9 External intrrupts Two UARTs I2C serial interface 2 SPI serial interfaces Two timers (7 capture/compare channels) PWM unit with up to 6 PWM outputs 4-channels 10bit ADC 2 CAN channels. Real Time Clock Watchdog Timer 46 General purpose I/O pins CPU clock up to 60 MHz On-chip crystal oscillator and On-chip PLL
30.7.201515www.keil.com/dd/docs/datashts/philips/lpc2119_2129.pdf
GSMGSM -Global System for Mobile communications.
•ETSI - European telecommunication standards
• protocols for second-generation (2G) digital cellular networks
•developed as a digital system using TDMA technology
30.7.201516www.engineersgarage.com/articles/gsm-gprs-modules
FEATURES
Dual band GSM/GPRS 900/1800MHz
Configurable baud rate
SIM card holder
Built in network status LED
Inbuilt powerful TCP/IP protocol
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WorkingGSM modem doesn’t have a keypad &
display. serial interfacecommands are called as AT commandsEvery command starts with "AT“ hence called
as AT commands. AT stands for attention
GSM/GPRS module consists of a GSM/GPRS modem assembled together with power supply circuit and communication interfaces.
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GSM modem works with 12V DC mismatch of voltage levels. Interfaced with the help of RS232 cable. MAX232 device : convert TTL logic level to RS232
level The RS232 device is an interface between DTE
&DCE
GSM Modem Interfacing with Microcontroller
30.7.201520https://en.wikipedia.org/wiki/MAX232
FLOWCHART
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PROJECT EXECUTION STEPS
Sensor reads the moisture contained in the soil and feeds to the microcontroller .
Microcontroller compare the sensor input and the threshold value
If the sensor input value is less than 50%, user is informed via android mobile phone. plants get watered or else it continues to read the moisture value
The watering stops till the moisture contain reaches the threshold value
When the pump stops user is again signaled via mobile
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CONCLUSION
A reliable and efficient system for monitoring the environmental parameters
Allows user to see accurate changes in it
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REFERENCES
www.engineersgarage.com/articles/gsm-gprs-modules
www.edgefx.in/gsm-interfacing-8051-microcontroller/ www.stevenswater.com/catalog/Stevens-Hydra- Probe.aspx
www.ijert.org/.../smart-irrigation-system-using-wireless-sensor-network
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THANK YOU