diff --git a/examples/DHTtester/DHTtester.ino b/examples/DHTtester/DHTtester.ino
index ff7a961..d13507b 100644
--- a/examples/DHTtester/DHTtester.ino
+++ b/examples/DHTtester/DHTtester.ino
@@ -20,7 +20,8 @@
 // NOTE: If using a board with 3.3V logic like an Arduino Due connect pin 1
 // to 3.3V instead of 5V!
 // Connect pin 2 of the sensor to whatever your DHTPIN is
-// Connect pin 4 (on the right) of the sensor to GROUND
+// Connect pin 3 (on the right) of the sensor to GROUND (if your sensor has 3 pins)
+// Connect pin 4 (on the right) of the sensor to GROUND and leave the pin 3 EMPTY (if your sensor has 4 pins)
 // Connect a 10K resistor from pin 2 (data) to pin 1 (power) of the sensor
 
 // Initialize DHT sensor.