Soil Moisture Monitoring Project
hi all,
i new using arduino , having few issues on project working on. need monitor soil moisture contents @ high degree of accuracy.
at moment have arduino uno , vegetronix vh400 soil moisture probe (http://www.vegetronix.com/products/vg400/).
i have been doing tests calibration curve accurate possible. starting dry soil, adding few ml every half hour , monitoring values arduino give me. have gone thorough process 10 times, , have plotted of data points.
in dry soil value of around 175, , in saturated soil value of 630. when put sensor glass of water value around 630.
it looks relationship between voltage , soil moisture content approximately linear, there variation. example, soil/water mixture of 50%, have received values ranging 360 400. range in results similar if use 5v or 3.3 volts.
i trying find way of using of 0 - 1023 possible (i.e.: achieving value closer 1023 when putting sensor water). think may allow me obtain more accurate calibration curve.
someone has mentioned using signal amplifier may help, have done reading still not sure if going need.
if has suggestions appreciated.
i new using arduino , having few issues on project working on. need monitor soil moisture contents @ high degree of accuracy.
at moment have arduino uno , vegetronix vh400 soil moisture probe (http://www.vegetronix.com/products/vg400/).
i have been doing tests calibration curve accurate possible. starting dry soil, adding few ml every half hour , monitoring values arduino give me. have gone thorough process 10 times, , have plotted of data points.
in dry soil value of around 175, , in saturated soil value of 630. when put sensor glass of water value around 630.
it looks relationship between voltage , soil moisture content approximately linear, there variation. example, soil/water mixture of 50%, have received values ranging 360 400. range in results similar if use 5v or 3.3 volts.
i trying find way of using of 0 - 1023 possible (i.e.: achieving value closer 1023 when putting sensor water). think may allow me obtain more accurate calibration curve.
someone has mentioned using signal amplifier may help, have done reading still not sure if going need.
if has suggestions appreciated.
watch out temperature well. did project once , didn't take temperature account. turns out flooding every night 'cause temp messing sensors.
can't on electrical bit though. i'm thinking add more error system though.
-jim lee
can't on electrical bit though. i'm thinking add more error system though.
-jim lee
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