const int p1ValAir = 571;  // input your completely dry probe reading here
const int p1ValWater = 260;  // input your completely submerged probe reading here


void setup() {
  Serial.begin(9600);
}


void loop() {
  int p1Val = analogRead(A2);
  int percent = map(p1Val, p1ValAir, p1ValWater, 0, 100);
  percent = constrain(percent, -10, 110);

  Serial.print("Soil capacitance = ");
  Serial.println(p1Val);

  Serial.print("Soil % = ");
  Serial.println(percent);

  delay(3000);
}