Name: JSN-SR04T Ultrasonic Distance Measuring Module
Working Voltage: DC 5V
Static Working Current: 5mA
Total Working Current: 30mA
Sound Wave Emission Frequency: 40KHz
Maximum Measurement Distance: 5m / 16.4ft
Blind Zone: 25cm / 0.98in
Wiring Method:+5V (Power Positive)；Trig (Control Pin) RX；Echo (Receive Pin) TX；GND (Power Negative)
Electrical Performance: Lead length is 2.5m / 8.2ft
Module Dimensions: 41mm (L) × 28.5mm (W) / 1.61in × 1.12in
Resolution: Approximately 0.5cm
Angle: Less than 50 degrees
Working Temperature: -10 to 70℃
Storage Temperature: -20 to 80℃
Working Principle:
1、Use the IO pin TRIG to trigger distance measurement by sending a high-level signal of at least 10us.
2、The module automatically sends 8 pulses of 40kHz square waves and detects whether a signal is returned.
If a signal is returned, the IO pin ECHO outputs a high level; the duration of the high level indicates the time taken for the ultrasonic wave to travel to the object and back. The measured distance = (high level time × speed of sound (340M/S)) / 2.
3、Usage: Send a high-level signal of more than 10us from a control pin, then wait for a high-level output at the receiving pin. Start a timer as soon as an output is detected. When the receiving pin goes low, read the timer's value; this value represents the time taken for distance measurement. Using the formula, the distance can be calculated. By continuously cycling this process, you can obtain the required measurement values.