Update count logic to auto calibrate based on 80us pulse at start. about adafruit_python_dht HOT 2 CLOSED

I implemented a different logic for AutoCalibrate using the 80uS pulses at the beginning. It certainly works (on my Pi2, with DHT11), and code becomes lot cleaner.

What I noticed is that the first 80uS is always records a larger counter than the second one, and it makes sense because I am doing bit of work when I detect a state change. So I took half of the average of the two 80uS pulses as the 40uS value. That is compared against the bit values.

https://github.com/AdysTech/raspy-weather/blob/master/dht11_driver/pi_2_dht_read.c

from adafruit_python_dht.

hi this repo is going to be deprecated soon, please try
https://github.com/adafruit/Adafruit_CircuitPython_DHT
which will replace this library

from adafruit_python_dht.