Although DHT11 and DHT22 are similar they are not the same. You cannot use a DHT22 library to read values from the DHT11 but also not a library which is for both and read the value for a DHT22 as you do in your posted code.
Although DHT11 and DHT22 are similar they are not the same. You cannot use a DHT22 library to read values from the DHT11 but also not a library which is for both and read the value for a DHT22 as you do in your posted code.