Hello, I'm currently using the DHT22 sensor. I can read the data but i don't know how to put the sensor in stand by mode because i only need the data every +-5 minutes.
The sensor automatically goes into standby mode at the end of the reading cycle, and stays that way until you read it again.
It draws approx 50 uA in standby mode.
possibly you could connect the 5V of the sensor to a digital pin and do digitalWrite(DHTVOLTAGE, HIGH); place a transistor in between if the DHT draws too much current.