If you mean DHT22, isn't it 3V? Or at least the voltage output for the sensors is 3V. Since DHT22's (meaning the AM2302) are 3 - 5V it should be OK.
(The AM2302 specs say 3.3 - 5.5V but lots of places advertise them as 3 - 5V so presumably they're OK at the 3V the board provides).
I've just found (probably) the post you're referring to. It'll be interesting to see whether the DHT22's I've ordered work at 3V, it may be that some do purely by coincidence. I agree that either this problem should be documented or the output should be changed to 5V because the DHT11 has a similar issue. Only the DS18B20 definitely has a 3V minimum, but even that's a minimum voltage not the recommended one.
(The AM2302 specs say 3.3 - 5.5V but lots of places advertise them as 3 - 5V so presumably they're OK at the 3V the board provides).
I've just found (probably) the post you're referring to. It'll be interesting to see whether the DHT22's I've ordered work at 3V, it may be that some do purely by coincidence. I agree that either this problem should be documented or the output should be changed to 5V because the DHT11 has a similar issue. Only the DS18B20 definitely has a 3V minimum, but even that's a minimum voltage not the recommended one.