Name: Rain Sensor (Water Level)
Description: Lesson 38 of Adventure Kit: Pandora's Box
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Rain Sensor (Water Level)
// Sensor pins
constexpr byte WATER_DETECTOR_PIN = A0;
constexpr byte POWER_PIN = 7;
 
void setup() {
  pinMode(WATER_DETECTOR_PIN, INPUT);
    pinMode(POWER_PIN, OUTPUT);
   
    // Set to LOW so no power flows through the sensor
    digitalWrite(POWER_PIN, LOW);
   
    Serial.begin(115200);
}
 
void loop() {
    //get the reading from the function below and print it
    int waterLevel = readSensor();
   
    Serial.print("Water level: ");
    Serial.println(waterLevel);
   
    delay(1000);
}
 
//This is a function used to get the reading
int readSensor() {
    digitalWrite(POWER_PIN, HIGH);  // Turn the sensor ON
    delay(10);                                  // wait 10 milliseconds
    int val = analogRead(WATER_DETECTOR_PIN);       // Read the analog value form sensor
    digitalWrite(POWER_PIN, LOW);       // Turn the sensor OFF
    return val;                                 // return current reading
}