Hello,

i use the example file dht_simpletest.py and replace D18 with D4 for use on Raspberry Pi 3.

But now I would like to set the pin over an enviroment variable. I add this to the script:

import os

DHT_DATA_PIN = int(os.environ.get('GPIO_PIN_DHT22', 4))

But now I have problem to replace the number 4 in this line:

dhtDevice = adafruit_dht.DHT22(board.D4)

This:

dhtDevice = adafruit_dht.DHT22(DHT_DATA_PIN)
# or
dhtDevice = adafruit_dht.DHT22(4)

works local on Raspberry, but not in Docker Container... error: self._pin = Pin(pin.id) AttributeError: 'int' object has no attribute 'id'. So i think i must use it with "board".

Can anyone help or have an idea? :-)

(My complete Code if it helps.)