const int humid = A5;
const int dry=585; //value for dry conditions
const int wet=298; //value for wet conditions

void setup() {
  Serial.begin(9600);
}
void loop() {
  int sensorVal=analogRead(humid);
  int percHumidity=map(sensorVal, wet, dry, 100,0); 
//transform sensor range in a % soil humidity scale
//careful: 298=100%, 585=0%

  Serial.print(percHumidity);
  Serial.println("%");
  
 delay(1000);
}