import machine
import onewire
import ds18x20
import utime

# Define the DS18B20 data pin and LED pin
ds_pin = machine.Pin(4)
led_pin = machine.Pin(15, machine.Pin.OUT)

# Initialize the DS18B20 sensor
ow = onewire.OneWire(ds_pin)
ds_sensor = ds18x20.DS18X20(ow)

# Temperature alarm threshold
alarm_threshold = 35.0

while True:
    scan = ds_sensor.scan()[0]
    if scan:
        ds_sensor.convert_temp()
        utime.sleep(0.2)
        temp = ds_sensor.read_temp(scan)
        print("Temperature: {:.2f}°C".format(temp))
        
        # Check if temperature exceeds the alarm threshold
        if temp > alarm_threshold:
            led_pin.on()
        else:
            led_pin.off()