In this step, you will learn how to use your Moisture Phidget.
You will need to create a new project called PhidgetsPlant and import the Phidgets Library. If you’ve forgotten how to do this, revisit the Configure section from the Getting Started Kit.
Write Code (Java)
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package phidgetsplant;
//Add Phidgets Library
import com.phidget22.*;
public class PhidgetsPlant {
public static void main(String[] args) throws Exception {
//Create
VoltageRatioInput soil = new VoltageRatioInput();
//Open
soil.open(1000);
//Use your Phidgets
while(true){
System.out.println("Soil Moisture Level: " + soil.getVoltageRatio());
Thread.sleep(100);
}
}
}
//Add Phidgets Library
import com.phidget22.*;
public class PhidgetsPlant {
public static void main(String[] args) throws Exception {
//Create
VoltageRatioInput soil = new VoltageRatioInput();
//Open
soil.open(1000);
//Use your Phidgets
while(true){
System.out.println("Soil Moisture Level: " + soil.getVoltageRatio());
Thread.sleep(100);
}
}
}
//Add Phidgets Library
import com.phidget22.*;
//Define
VoltageRatioInput soil;
void setup(){
try{
//Create
soil = new VoltageRatioInput();
//Open
soil.open(1000);
}catch(Exception e){
//Handle Exceptions
e.printStackTrace();
}
}
void draw(){
try{
//Use your Phidgets
println("Soil Moisture Level: " + soil.getVoltageRatio());
delay(250);
}catch(Exception e){
//Handle Exceptions
e.printStackTrace();
}
}
Write Code (Python)
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#Add Phidgets Library
from Phidget22.Phidget import *
from Phidget22.Devices.VoltageRatioInput import *
#Required for sleep statement
import time
#Create
soil = VoltageRatioInput()
#Open
soil.openWaitForAttachment(1000)
#Use your Phidgets
while (True):
print("Soil Moisture Level: " + str(soil.getVoltageRatio()))
time.sleep(0.1)
Write Code (C#)
Not your programming language? Set your preferences so we can display relevant code examples.
//Add Phidgets Library
using Phidget22;
namespace PhidgetsPlant
{
class Program
{
static void Main(string[] args)
{
//Create
VoltageRatioInput soil = new VoltageRatioInput();
//Open
soil.Open(1000);
//Use your Phidgets
while (true)
{
System.Console.WriteLine("Soil Moisture Level: " + soil.VoltageRatio);
System.Threading.Thread.Sleep(100);
}
}
}
}
Write Code (Swift)
Not your programming language? Set your preferences so we can display relevant code examples.
The code below assumes you've created a single label and linked it to an IBAction named soilLabel
import Cocoa
//Add Phidgets Library
import Phidget22Swift
class ViewController: NSViewController {
@IBOutlet weak var soilLabel: NSTextField!
//Create
let soil = VoltageRatioInput()
override func viewDidLoad() {
super.viewDidLoad()
do{
//Subscribe to event
let _ = soil.voltageRatioChange.addHandler(soil_change)
//Open
try soil.open()
}catch{
print(error)
}
}
func soil_change(sender:VoltageRatioInput, voltageRatio: Double){
DispatchQueue.main.async {
//Use your Phidget
self.soilLabel.stringValue = String(voltageRatio)
}
}
}
Run Your Program
Your program will print a soil moisture value between 0 and 1.
Collect Values
Using your program, determine the following values:
| Moisture Sensor Location | Voltage Ratio |
|---|---|
| In Air | ? |
| In Dry Soil | ? |
| In Water | ? |
Make sure to write these values down. You will need them later when designing your system.
Troubleshoot
- Make sure everything is plugged in properly and your VINT Hub is connected to your computer.
- Stop running other programs that are using your Phidgets before running a program.
If you are still having issues visit Advanced Troubleshooting
