import os
import glob
import time
import subprocess

# Base directory for the 1-Wire devices
base_dir = '/sys/bus/w1/devices/'
# Device folder for your specific sensor
device_folder = glob.glob(base_dir + '28-1f38831e64ff')[0]
# Path to the w1_slave file
device_file = device_folder + '/w1_slave'

def read_temp_raw():
    """Read the raw temperature data from the sensor."""
    with open(device_file, 'r') as f:
        lines = f.readlines()
    return lines

def read_temp():
    """Parse the raw temperature data and return the temperature in Celsius."""
    lines = read_temp_raw()
    # Wait until the sensor output is valid
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    # Find the temperature value in the second line
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos + 2:]
        temp_c = float(temp_string) / 1000.0
        return temp_c

def execute_command(command):
    """Execute a shell command."""
    subprocess.run(command, shell=True)

# Main loop to read and print the temperature
if __name__ == "__main__":
    execute_command('pinctrl set 18 op')    # First, set it as output
    while True:
        temp_c = read_temp()
        print(f"Temperature: {temp_c:.2f} °C")
        
        if temp_c >= 46:
            execute_command('pinctrl set 18 dl')
        elif temp_c <= 40:
            execute_command('pinctrl set 18  dh')
        
        time.sleep(1)