Wi-Fi Enabled Soil Moisture Sensor
Overview
โข Circuit to Measure Capacitanceโข Soil Moisture Sensorโข Electric Imp (Wi-Fi)
Measuring Capacitance
)
h๐ ๐๐๐๐=๐ ๐ถ๐ ๐๐๐๐๐๐๐๐๐๐๐๐๐๐๐ โฆโฆ ..
๐ถ=โ๐ก
๐ โ ln (1โ๐ (๐ก )๐ 0
)
๐ธ๐๐ข๐๐ก๐๐๐๐น๐๐ ๐ h๐ถ ๐๐๐๐๐๐๐ถ๐๐๐๐๐๐ก๐๐ :
Measuring Capacitance
Measuring Capacitance
Measuring Capacitance
Measuring Capacitance
Measuring Capacitance
Measuring Capacitance
View of The Circuit
Circuit Output
Soil Moisture Sensor
Circuit Output With Sensor In Soil
Circuit Output with Sensor in Air
Testing
Using Capacitance to Estimate Dielectric Value of the Soil
C ๐0=Vacuum Permittivity
Testing Results
5.00E+00 1.00E+01 1.50E+01 2.00E+01 2.50E+01 3.00E+010
2
4
6
8
10
12
14
16
18
f(x) = 0.691042616968669 x โ 3.21588628446756Rยฒ = 0.68086321570672
Soil Moisture Probe Dielectric (Capacitance / Vacuum Permittivity)(F/m)
Deca
gon
Diel
ectr
ic (F
/m)
Electric Imp
Sending Emails of Dielectric Values
Sending Emails of Dielectric Values
Future Plans
โข Enclosureโข Further Testing to Improve Capacitance
Measuring Circuitโข Better Calibration
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