How to interface with an Arduino?

To interface the Waterproof Ultrasonic Module JSN-SR04T (or AJ-SR04M) with an Arduino UNO, you'll need to connect the sensor to the Arduino and write a sketch (code) to read the distance measurements. Here's a step-by-step guide:

Wiring the Sensor

1. Connect the VCC Pin:

   • JSN-SR04T: Connect the VCC pin to the 5V pin on the Arduino.
   • AJ-SR04M: Connect the VCC pin to the 5V pin on the Arduino.

2. Connect the GND Pin:

   • Connect the GND pin to the GND pin on the Arduino.

3. Connect the Trigger Pin:

   • JSN-SR04T: Connect the Trigger pin to a digital pin on the Arduino (e.g., pin 9).
   • AJ-SR04M: Connect the Trigger pin to a digital pin on the Arduino (e.g., pin 9).

4. Connect the Echo Pin:

   • JSN-SR04T: Connect the Echo pin to a digital pin on the Arduino (e.g., pin 10).
   • AJ-SR04M: Connect the Echo pin to a digital pin on the Arduino (e.g., pin 10).

Example Arduino Sketch

Here's a basic example of an Arduino sketch to measure distance using the JSN-SR04T or AJ-SR04M sensor:

// Define pins
const int triggerPin = 9;
const int echoPin = 10;

// Define variables
long duration;
int distance;

void setup() {
  // Start the serial communication
  Serial.begin(9600);
  
  // Set the trigger pin as an output
  pinMode(triggerPin, OUTPUT);
  // Set the echo pin as an input
  pinMode(echoPin, INPUT);
}

void loop() {
  // Send a 10 microsecond pulse to trigger the sensor
  digitalWrite(triggerPin, LOW);
  delayMicroseconds(2);
  digitalWrite(triggerPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(triggerPin, LOW);
  
  // Read the duration of the pulse from the echo pin
  duration = pulseIn(echoPin, HIGH);
  
  // Calculate the distance in cm
  distance = duration * 0.0344 / 2;
  
  // Print the distance to the Serial Monitor
  Serial.print("Distance: ");
  Serial.print(distance);
  Serial.println(" cm");
  
  // Wait for a short time before measuring again
  delay(500);
}

Key Points:

• Trigger Pin: Sends a pulse to start the measurement.
• Echo Pin: Receives the pulse that bounces back from the object.

Make sure to adjust the pin numbers if you use different pins on your Arduino. Also, ensure that your sensor is compatible with the voltage levels of the Arduino to avoid any damage.