Are you using this DHTxx breakout: seeedstudio.com/wiki/Grove-_ … ity_Sensor so you can have a look at the first photo: You can see the pin connections: The order is
GND VCC NC SIG
NC means not connected and SIG is your signal, so the last pin is the signal pin. Compare this with the Grove connector on your picture: So the last pin of Stalker’s connector is D7! Use D7 as input pin for the DHT:
#define DHTPIN 7 // what pin we're connected toShould work!