from machine import Pin, ADC
import time
import random
# Built-in LED
led = Pin(25, Pin.OUT)
# Pico's built-in temperature sensor
temperature_sensor = ADC(4)
# Temperature limit
LIMIT = 30.0
print("Raspberry Pi Pico Temperature Monitoring")
print("----------------------------------------")
print("Limit:", LIMIT, "°C")
print()

reading_number = 1
while True:
    # Read the built-in temperature sensor
    raw_value = temperature_sensor.read_u16()

    # Wokwi's internal temperature sensor is not physically modeled,
    # so generate a realistic simulated temperature for demonstration.
    temperature = random.uniform(20, 40)

    # Round to 2 decimal places
    temperature = round(temperature, 2)

    # Check temperature against limit
    if temperature > LIMIT:
        led.value(1)
        status = "ALERT - LED ON"
    else:
        led.value(0)
        status = "Normal - LED OFF"

    # Display reading
    print(
        "Reading:", reading_number,
        "| Temperature:", temperature, "°C",
        "|", status
    )
    reading_number += 1
    # Take a reading every 2 seconds
    time.sleep(2)