const int voltagePin = A0; // Analog pin to read voltage
const int relayPin = 2;    // Digital pin to control relay
const float voltageThreshold = 20.0; // Voltage threshold for cutoff

void setup() {
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW); // Initially, relay is off
  Serial.begin(9600); // For debugging
}

void loop() {
  int sensorValue = analogRead(voltagePin);
  float voltage = (sensorValue / 1023.0) * 24.0; // Assume sensor range 0-50V

  Serial.print("Battery Voltage: ");
  Serial.println(voltage);

  if (voltage < voltageThreshold) {
    digitalWrite(relayPin, LOW); // Cut off relay
    Serial.println("Voltage below threshold, relay OFF");
  } else {
    digitalWrite(relayPin, HIGH); // Relay ON
    Serial.println("Voltage above threshold, relay ON");
  }

  delay(1000); // Delay for stability
}