from machine import Pin, ADC, PWM
import utime

# Constants for simulation
VOLTAGE_MAX = 240  # Simulated maximum voltage (in volts)
CURRENT_MAX = 10   # Simulated maximum current (in amperes)
OVERLOAD_THRESHOLD = 500  # Overload threshold in watts

# Pins and components
voltage_sensor = ADC(0)  # Voltage sensor (potentiometer on ADC0)
current_sensor = ADC(1)  # Current sensor (potentiometer on ADC1)
overload_led = Pin(15, Pin.OUT)  # LED for overload indication
normall_led = Pin(13, Pin.OUT)  # LED for overload indication
buzzer = PWM(Pin(14))  # Buzzer on GP14 with PWM for tone control

def read_sensor(adc, max_value):
    """Read ADC value and convert to real-world value."""
    raw_value = adc.read_u16()  # ADC range: 0 to 65535
    return (raw_value / 65535) * max_value

def calculate_power(voltage, current):
    """Calculate power (P = V * I)."""
    return voltage * current

def play_buzzer():
    """Play a warning tone on the buzzer."""
    buzzer.freq(1000)  # Set frequency to 1kHz
    buzzer.duty_u16(32768)  # 50% duty cycle (0-65535)
    utime.sleep(0.5)  # Buzz for 0.5 seconds
    buzzer.duty_u16(0)  # Turn off buzzer

while True:
    # Read simulated voltage and current values
    voltage = read_sensor(voltage_sensor, VOLTAGE_MAX)
    current = read_sensor(current_sensor, CURRENT_MAX)
    
    # Calculate power
    power = calculate_power(voltage, current)
    
    # Display values (for debugging in the Wokwi console)
    print(f"Voltage: {voltage:.2f} V, Current: {current:.2f} A, Power: {power:.2f} W")
    
    # Check for overload condition
    if power > OVERLOAD_THRESHOLD:
        overload_led.value(1)  # Turn on LED
        normall_led.value(0)
        play_buzzer()  # Play buzzer sound
        print("Overload Detected")
    else:
        overload_led.value(0)  # Turn off LED
        normall_led.value(1)
        print("Normal")
    
    utime.sleep(1)  # Delay for readability