#include <Arduino.h>

const int waterLevelPin = 34; // Potentiometer connected to GPIO34
const int relayPin = 25;      // Relay module connected to GPIO25
const int threshold = 50;     // Water level threshold percentage to trigger the relay

void setup() {
  Serial.begin(115200);      // Initialize serial communication at 115200 baud rate
  pinMode(waterLevelPin, INPUT); // Set GPIO34 as input for the potentiometer
  pinMode(relayPin, OUTPUT);     // Set GPIO25 as output for the relay module
  digitalWrite(relayPin, LOW);   // Initialize the relay as OFF
}

void loop() {
  int waterLevelValue = analogRead(waterLevelPin);  // Read the analog value from the potentiometer
  int waterLevelPercentage = map(waterLevelValue, 0, 4095, 0, 100); // Map the value to a percentage (0-100%)
  
  Serial.print("Water Level: ");   // Print the water level percentage to the Serial Monitor
  Serial.print(waterLevelPercentage);
  Serial.println("%");

  // Control the relay based on the water level
  if (waterLevelPercentage > threshold) {
    digitalWrite(relayPin, HIGH);  // Turn ON the relay if water level exceeds the threshold
    Serial.println("Relay ON");
  } else {
    digitalWrite(relayPin, LOW);   // Turn OFF the relay if water level is below the threshold
    Serial.println("Relay OFF");
  }

  delay(1000); // Add a delay before the next reading
}