Ping_UART.ino

/*
 * Codeing By IOXhop : www.ioxhop.com
 */
 
#include <SoftwareSerial.h>;
 
#define TX_PIN 2 // Pin connect to Tx
#define RX_PIN 3 // Pin connect to Rx

SoftwareSerial mySerial(RX_PIN, TX_PIN); // Rx, Tx

void setup() {
  Serial.begin(9600);
  mySerial.begin(9600);
  Serial.println("Distance");
}
 
void loop() {
  mySerial_flush();
  mySerial.write(???);
  delay(100);
  if(mySerial.available() < 2) {
    Serial.println("Error read");
    delay(500);
    return;
  }
  unsigned int distance = mySerial.read() ??? mySerial.read();
  
  Serial.print(distance);
  Serial.print(" mm.\t");
  delay(500);
}

void mySerial_flush() {
  while(mySerial.available())
    mySerial.read();
}