I’ve tried the DHT11 sensor modules at both Vcc 3.3V and 5.0V, and at both voltages the humidity values are bad. dfrobot has introduced a V2 DHT11 sensor module that changes the 10K pull-up to 4.7K.

This is exactly what I did. I just mounted a DHT22 sensor below the ESP8266 and made it sleep whenever its not getting any readings. If there’s any heat convection should pull room air across ...