Obstacle avoidance module. Detects when objects are within the calibrated range.This device has 3 pins. Ground (G), VCC (V), and Signal (S). The signal wire line is digital. It will either be high or low. High if the detected range is further than the calibrated distance, low if the detected range is less than the calibrated distance. How to use it with the Arduino Power the device by connecting Ground to Ground, VCC to 5v. Connect signal to a digital pin. Youll then need to set the digital pin to INPUT mode. Read the digital pin. The pin will read high if the detected distance.