Also the ground on the sensor does need to be connected to the Arduino's ground!!!!
Just out of curiosity... what did you connect the ground to?
ReadyCurrent humdity = 70.0% temperature = 23.0C
DHT11 TEST PROGRAM LIBRARY VERSION: 0.3.2Read sensor: OKHumidity (%): 70.00Temperature (oC): 23.00Temperature (oF): 73.40Temperature (K): 296.15Dew Point (oC): 17.25Dew PointFast (oC): 17.23
Why bother providing the second byte in each case if its always 0? The Resolution is stated as 1 digit so the decimal fraction is useless?