Simple serial device test program

#include <SoftwareSerial.h>

#define RX 2
#define TX 3
#define BAUD 9600

boolean echoOn = true;

SoftwareSerial ss (RX, TX);

void setup() {
  Serial.begin(BAUD);
  ss.begin(BAUD);
  Serial.print("Simple serial device tester.");
}

void loop() {
  if (Serial.available()) {
    char ch = Serial.read();
    if (echoOn) {
      Serial.println(ch);
    }
    ss.print(ch);
  }

  if (ss.available()) {
    char ch = ss.read();
    Serial.print(ch);
  }
}