The basic working principle1. Using IO port TRIG trigger location, to the high level signal of at least 10us;2. Module automatically sends 8 40KHz Fang Bo, automatic detecting whether a signal return;3. A signal return, a high level is output through the IO port , the time duration of the high level is ultrasonic from launch to return. The test distance = (high level time x speed of sound (340M/S)) /2;4. This module uses the simple method, a control port with a 10US above high level, can wait for high level output at the receiving port. An output can drive the , when this port is low can read the value, this time for the location of the time, can be calculated distance. So constantly cycle test, that can achieve the measurement of the value of your mobile.Electrical properties1.Electrical parameters: JSN-SR04T2.Operating voltage: DC 5V3.Quiescent current: 5mA4.Total current work: 30mA5.Acoustic emission frequency: 40khz6.Farthest distance: 4.5m7.Blind: 25cm8.Wiring: + 5V (positive power supply)Trig (control side) RX(the receiver) TXGND (negative)9.Resolution: about 0.5cm10.Angle: less than 50 degrees11.Working temperature: -10 ~ 70 Celsuis12.Storage temperature: -20 ~ 80 CelsuisProduct Features1.Small size, easy to use2.Low voltage, low power consumption3.High accuracy4.Strong anti-jamming5.Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasionsApplication1.Horizontal distance;2.Obstacle avoidance, automatic control;3.The object approaches, there is a perceived4.Traffic control;5.Security, industrial control;6.Artificial intelligence, and researchColor: Random color, No specification acceptedMaterial: PCBSpecifications:Old versionThe appearance and color of the product from batch to batch, but will not affect the usePackage Contents:1 x Ultrasonic ModuleOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.