A little script to test the basic set-up of the Pi

thermo_test.py

import glob
import time
from pytz import timezone
from datetime import datetime


base_dir = '/sys/bus/w1/devices/'
device_folder = glob.glob(base_dir + '28*')[0]
device_file = device_folder + '/w1_slave'

amsterdam = timezone('Europe/Amsterdam')

def read_temp_raw():
    f = open(device_file, 'r')
    lines = f.readlines()
    f.close()
    return lines

def read_temp():
    lines = read_temp_raw()
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    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 get_time():
    # now = datetime.now()
    now = datetime.now(amsterdam)
    time = now.strftime("%H:%M:%S")
    return time

while True:
    with open('./temp_input.txt', 'a') as writer:
        timestamp = get_time()
        temp = str(read_temp())
        writer.write(timestamp + " : temperature: ")
        writer.write(temp + "C")
        writer.write("\n")
        time.sleep(60)