#include <ACS712.h>

// Define pins
const int relayPin = 7;
const int voltagePin = A0;
const int currentPin = A1;
const float voltageCalibration = 11.0; // Adjust based on your voltage sensor
const float currentCalibration = 30.0; // Adjust based on your current sensor

// Initialize current sensor
ACS712 sensor(ACS712_30A, A1);

void setup() {
  Serial.begin(9600);
  pinMode(relayPin, OUTPUT);
  digitalWrite(relayPin, LOW); // Start with the relay off

  sensor.calibrate();
}

void loop() {
  // Read voltage
  int voltageReading = analogRead(voltagePin);
  float voltage = voltageReading * (voltageCalibration / 1023.0);

  // Read current
  float current = sensor.getCurrentAC();

  // Calculate power
  float power = voltage * current;

  // Print values
  Serial.print("Voltage: "); Serial.print(voltage); Serial.print(" V, ");
  Serial.print("Current: "); Serial.print(current); Serial.print(" A, ");
  Serial.print("Power: "); Serial.print(power); Serial.println(" W");

  // Control relay based on power consumption
  float powerThreshold = 100.0; // Set your power threshold here in watts
  if (power > powerThreshold) {
    digitalWrite(relayPin, LOW); // Turn off appliance
    Serial.println("Appliance turned off due to high power consumption");
  } else {
    digitalWrite(relayPin, HIGH); // Turn on appliance
  }

  delay(1000); // Adjust delay as needed
}