Product Description
Main Features Include:
- HCSR04 ultrasonic module can offer non-contact distance sensing function
- Includes ultrasonic transmitter, receiver and control circuit
- Operation requirement: Take IO port TRIG to trigger ranging (needs 10us high level signal at minimum)
Operating principles:
- Can send 8 pro 40kz square wave automatically, and will test if any signal returned
- If signal returned, will output one high level signal via IO port ECH
- Duration of the high level signal is time from transmitter to receiving with ultrasonic
