water temp sensor - sleep() does not work as intended!!

I have a water temp sensor DS18B20 (https://www.adafruit.com/product/381) It’s connected to pin GPIO4 and it has a 10k resistor like recommended I want to have readings every second So I’ve done this

from time import sleep
from datetime import datetime
from w1thermsensor import W1ThermSensor
## Constants
MEASURE_INTERVAL = 1   #seconds
while True:
    d = datetime.now()
    time_ = '{:%H:%M:%S}'.format(d)
    # (DS18B) Water temperature sensor
    try:
        w = W1ThermSensor()
        water_temp = str(w.get_temperature())  # default pin GPIO4 for data and temp in Celsius degrees
    except:
        water_temp = '0'
    print(time_,water_temp)
    sleep(MEASURE_INTERVAL)

However instead 1 sec interval I’m having 2 sec consistently (most of times) this is the result

17:20:55 19.437
17:20:57 19.437
17:20:59 19.437
17:21:01 19.437
17:21:03 19.437
17:21:05 19.437
17:21:06 19.437
17:21:08 19.437
17:21:10 19.437
17:21:12 19.437
17:21:14 19.437
17:21:16 19.437
17:21:17 19.437
17:21:19 19.437
17:21:21 19.437

Why? I don’t understand should i change something in W1ThermSensor class?

[Ricardosgeral]

Yes! But I placed the reading in a separate Thread. Thanks

On 5 Feb 2018 12:31 p.m., “Timo Furrer” [e-mail] wrote:

Thanks @bsimmo https://github.com/bsimmo ! @Ricardosgeral https://github.com/ricardosgeral does that solve your problem?

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/timofurrer/w1thermsensor/issues/45#issuecomment-363071319, or mute the thread https://github.com/notifications/unsubscribe-auth/AdESUDjeDe8g-02h3qqxNKEZr2biwAmeks5tRvSTgaJpZM4R3h1z .

[timofurrer]

Thanks @bsimmo ! @Ricardosgeral does that solve your problem?