Moisture soil sensor

garden-water.ino

int soilPin = A0;
int soilPower = 7;

void setup() 
{
  Serial.begin(9600);   // open serial over USB
  pinMode(soilPower, OUTPUT);
  digitalWrite(soilPower, LOW);
}

void loop()
{
  Serial.print("Soil Moisture = ");    
  Serial.println(readSoil());
  delay(1000);
}

int readSoil()
{
  digitalWrite(soilPower, HIGH);
  delay(1000);
  int val = analogRead(soilPin);
  digitalWrite(soilPower, LOW);
  return val;
}