HiLetgo 2pcs JSN-SR04T Integrated Ultrasonic Module Distance Measuring Transducer Sensor Waterproof for Arduino...

The original purchase of a year ago are still working fine.

Have these installed in four of my water tanks at home. I can monitor the levels on my phone from anywhere

Tengo en mi casa un medidor de nivel de tanque con un ESP32 y un sensor ultrasonido HC-SR04, que aunque me funciona muy bien, cada cierto tiempo tengo que cambiarlo porque se me daa producto de humedad y agua que le salpica cuando se llena el tanque. Vi este este sensor y pens que podra ser la solucin a mi problema pues es resistente al agua. La cuestin es que me lleg y lo prob de diferentes e incluso ajustando el cdigo con pequeos cambios como sugieren en las otras reseas e internet, pero que va no funciona como deseaba. Las mediciones no son buenas ni es constantes, adems de mostras muchas mediciones en 0 (que no es gran problema porque se puede solucionar por programacin). En fin no me siento satisfecho con este sensor as que seguir con mi sensor tradicional hasta que consiga una mejor opcin. I have in my house a tank level meter with an ESP32 and an HC-SR04 ultrasound sensor, which although it works very well for me, every so often I have to change the sensor because it gets damaged due to the humidity in the tank and the water that splashes on it when it is filling up. I saw this this sensor and I thought it could be the solution to my problem because it is waterproof. The point is that it came to me and I tried it in different ways and even adjusting the code with small changes as suggested in the other reviews here and on the internet, but it does not work as I wanted. The measurements are not good nor are they constant, in addition to indicating many measurements at 0 (which is not a big problem because it can be solved by programming). Anyway, I am not satisfied with this sensor so I will continue with my traditional sensor until I get a better option.

I am going to use this to measure water level in an in ground tank. When I first hooked it up and tried my code I was getting unstable and incorrect values. I found a U-tube video with sample code that changed the ranging delay from 10us to 20us. Magic! Accurate, stable readings. This code does not need a ranging library. void loop(void) { // Set the trigger pin to low for 2uS digitalWrite(TRIGPIN, LOW); delayMicroseconds(2); // Send a 20uS high to trigger ranging Try 20 here instead of 10 digitalWrite(TRIGPIN, HIGH); delayMicroseconds(20); // Send pin low again digitalWrite(TRIGPIN, LOW);

The description should be updated to indicate that these sensors are V 2.0. As such most V1 libraries out there DO NOT WORK. However this can be overcome with some simple code...example below: #define ECHOPIN 2// Pin to receive echo pulse #define TRIGPIN 3// Pin to send trigger pulse void setup(){ Serial.begin(9600); pinMode(ECHOPIN, INPUT); pinMode(TRIGPIN, OUTPUT); digitalWrite(ECHOPIN, HIGH); } void loop(){ digitalWrite(TRIGPIN, LOW); // Set the trigger pin to low for 2uS delayMicroseconds(2); digitalWrite(TRIGPIN, HIGH); // Send a 10uS high to trigger ranging delayMicroseconds(10); digitalWrite(TRIGPIN, LOW); // Send pin low again int distance = pulseIn(ECHOPIN, HIGH,26000); // Read in times pulse distance= distance/58; Serial.print(distance); Serial.println(" cm"); delay(50);// Wait 50mS before next ranging }