![]() Monitoring of objects and their movementĭimensions for the JSN SR-04T are given below.Using this information, the distance is measured as explained in the above heading. The amount of time during which the Echo pin stays high is measured by the MCU/MPU as it gives information about the time taken for the wave to return back to the Sensor. Once the wave is returned after it getting reflected by any object, the Echo pin goes high for a particular amount of time which will be equal to the time taken for the wave to return back to the sensor. This action will trigger an ultrasonic wave at a frequency of 40Hz from the transmitter and the receiver will wait for the wave to return. To start the measurement, the trigger pin has to be made high for 15uS and then turned off. The Trigger and the Echo pins are both I/O pins and hence they can be connected to the I/O pins of the microcontroller. Power the Sensor using a regulated +5V through the VCC ad Ground pins of the sensor. It can be interfaced with microcontrollers like Arduino, ARM, PIC, Raspberry Pi, etc. How to use the JSN-SR04 Waterproof Ultrasonic SensorĪs mentioned earlier, this sensor’s Pin-out and working are similar to the HC-SR04 distance sensor. Now simply calculate the distance using a microcontroller or microprocessor. This way, we can also know the time taken. The circuitry inbuilt on the module will calculate the time taken for the US wave to come back and turns on the echo pin high for that same particular amount of time. Since we are using the Ultrasonic wave, we know the universal speed of US wave at room conditions which is 330m/s. Now, to calculate the distance using the above formulae, we should know the Speed and time. This wave travels in air and when it gets objected by any material, it gets reflected back toward the sensor, this reflected wave is observed by the Ultrasonic receiver module. The Ultrasonic transmitter transmits an ultrasonic wave. The sensor works with the simple high school formula- Distance = Speed × Time This sensor module comes in two separate parts one being the transducer, which is the sensing element, and the other being the control board. But JSN SR-04 sensor has only one transducer that is connected through a 2.5 Meter cable. JSN SR-04 Sensor’s working is same as HC-SR04. US transmitter-Receiver pair, IR sensor module, IR sensor pair, IR Analog distance sensor Note: Complete technical details can be found in the JSN SR-04T Waterproof Ultrasonic Sensor Datasheet linked at the bottom of this page. Integrated with wire enclosed waterproof probe, suitable for wet, harsh measurement occasions.This pin is connected to the Ground of the system. This pin goes high for a period that will be equal to the time taken for the ultrasonic wave to return to the sensor. This pin has to be kept high for 10us to initialize measurement by sending ultrasonic waves. However, it typically works with 5.0V DC voltage and requires a maximum of 30mA current. It works with a nominal 4.5V to a maximum of 5.5 VDC supply voltage. It is very similar to the ultrasonic sensors which are found in car bumpers. JSN-SR0T4 is a waterproof ultrasonic distance measurement sensor module with a range of 25cm-450cm non-contact distance measurement.
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