update pin description

README.md

@@ -14,10 +14,10 @@ The default I²C address of [SEN66](https://www.sensirion.com/products/catalog/S
 
 ## Setup Guide
 
-### Connecting the Sensor
+### Connect the Sensor
 
-Your sensor has 6 different signals that need to be connected to your board: VDD, GND, SDA, SCL, GND, VDD.
-Use the following pins to connect your SEN66:
+Your sensor has 4 different pins that need to be connected to your board: VDD, GND, SDA, SCL.
+Use the following description to connect your SEN66:
 
 <img src="images/sen6x-pinout.png" width="300px">
 
@@ -27,8 +27,8 @@ Use the following pins to connect your SEN66:
 | 2 | black | GND | Ground |
 | 3 | green | SDA | I2C: Serial data input / output | TTL 5V compatible
 | 4 | yellow | SCL | I2C: Serial clock input | TTL 5V compatible
-| 5 |  | GND | Ground | Do not connect (Pins 2 and 5 are connected internally)
-| 6 |  | VDD | Supply Voltage | Do not connect (Pins 1 and 6 are connected internally)
+| 5 |  | NC | Do not connect | Ground (Pins 2 and 5 are connected internally)
+| 6 |  | NC | Do not connect | Supply voltage (Pins 1 and 6 are connected internally)
 
 
 
@@ -165,4 +165,4 @@ they are fixed.
 
 # License
 
-See [LICENSE](LICENSE).
+See [LICENSE](LICENSE).