Raspberry Pi 4 + DHT11 Sensor no floating point temps

[dvelaren]

Hello Adafruit Devs,

I would like to report a problem dealing with DHT11 sensor readings using your library. It seems that the decimals for the temperature are missing. I'm only getting temperatures without decimal precision (it is always 0).

Here is the minimal code to reproduce the issue:

import time
import board
import adafruit_dht

sensor = adafruit_dht.DHT11(board.D17)

while True:
    try:
        temperature = sensor.temperature
        humidity = sensor.humidity
        print(f"Temp: {temperature:.2f} °C, Hum: {humidity:.2f} %")
    except RuntimeError as e:
        print(f"Reading from DHT failure: {e.args[0]}")
        time.sleep(2)
        continue
    except Exception as e:
        sensor.exit()
        raise e
    time.sleep(2)

I'm getting this output always:

Temp: 28.00 °C, Hum: 64.00 %
Temp: 27.00 °C, Hum: 64.00 %
Temp: 28.00 °C, Hum: 64.00 %

[TheChilliPL]

I have the same issue

[manyhuis]

I did a little digging and found a fix for myself. If you are able to edit the source adafruit_dht.py file...

Change Line 239 from
new_temperature = buf[2]

to
new_temperature = buf[2] + float(buf[3])/10