Pin Number
Pin Name
Description
1
Vcc
The Vcc pin powers the sensor, typically with +5V
2
Trigger
Trigger pin is an Input pin. This pin has to be kept high for 10us to initialize measurement by sending US wave.
3
Echo
Echo pin is an Output pin. This pin goes high for a period of time which will be equal to the time taken for the US wave to return back to the sensor.
4
Ground
This pin is connected to the Ground of the system.