Cpolebev 1Pcs Ultrasonic Module -SR04 SR04 4Pin Distance Measuring Transducer Sensor Easy Install

Wiring methods, VCC, trig (control end), (receiver end), GND High precision module, blind spot (2cm) ultra close Description/Features: Stable performance and precise distance measurement Usage: If a control port sends a high level of 10US or more, you can wait for the high level output at the receiving port. Once there is an output, you can start the timer timer. When this port becomes low, you can read the value of the timer. This is the time for this distance measurement, and then the distance can be calculated. This continuous cycle measurement can reach the value of your mobile measurement