A0221AU ultrasound distance sensor

Other Hardware Sensors
3

Hello,

Below the code I used for testing both sensors.

#include <SoftwareSerial.h>
int distance = 0;
int pinRX = 10;
int pinTX = 11;
unsigned char data_buffer[4] = {0};
unsigned char CS;

// Object to represent software serial port
SoftwareSerial mySerial(pinRX, pinTX);

void setup() {
// put your setup code here, to run once:
Serial.begin (9600);

// Set up SoftwareSerial port
mySerial.begin(9600);
}

void loop() {

// Check if data available on mySerial port
if (mySerial.available() > 0) {
delay (4);

if (mySerial.read() == 0xff) { // detect 0xff (= delimiter) before reading the 4 data bytes
  data_buffer[0] = 0xff;
  for (int i = 1; i < 4; i++) {  // Read 4 data bytes
    data_buffer[i] = mySerial.read();
  }

  // compute CheckSum
  CS = data_buffer[0] + data_buffer[1] + data_buffer[2];
  if (data_buffer[3] == CS) {
    distance = (data_buffer[1] << 8) + data_buffer[2];
  }
}

}

if (distance >= 4000 || distance <= 30) {
Serial.println("OutOfRange");
}
else {
// Serial.print (Dip1); Serial.print (Dip2);
Serial.print (distance);
Serial.println (" mm");
}
delay(2000);
}