A1: When we provide a pulse trigger signal with more than 10uS through singal pin, the Grove_Ultrasonic_Ranger will issue 8 cycles of 40kHz cycle level and detect the echo. The pulse width of the echo signal is proportional to the measured distance. Here is the formula: Distance = echo signal high time * Sound speed (340M/S)/2.
Q2: Why Grove-Ultrasonic sensor only has 1 signal pin, comparing with other ultrasonic sensor Trig and Echo pins?
A2:Grove_Ultrasonic_Ranger’s trig and echo signal share 1 SIG pin through MCU.
Q3: Where can I find technical support if I have some other issue.
A3: Please send an email to firstname.lastname@example.org